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芦荟胶加冷元治疗多西他赛外渗致组织坏死4例 被引量:2
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作者 丛培馥 吴迎春 谭惠敏 《现代中西医结合杂志》 CAS 2010年第18期2286-2286,共1页
关键词 芦荟胶 冷元 多西他赛 外渗 组织坏死
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FEM simulation and experimental verification of temperature field and phase transformation in deep cryogenic treatment 被引量:4
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作者 黎军顽 汤磊磊 +1 位作者 李绍宏 吴晓春 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第10期2421-2430,共10页
Combining with the low temperature material properties and the boiling heat transfer coefficient of specimen immersed in the liquid nitrogen, a numerical model based on metallo-thermo-mechanical couple theory was esta... Combining with the low temperature material properties and the boiling heat transfer coefficient of specimen immersed in the liquid nitrogen, a numerical model based on metallo-thermo-mechanical couple theory was established to reproduce the deep cryogenic treatment (DCT) process of a newly developed cold work die steel Cr8Mo2SiV (SDC99). Moreover, an experimental setup for rapid temperature measurement was designed to validate the simulation results. The investigation suggests that the differences in temperature and cooling rate between the surface and core of specimen are very significant. However, it should be emphasized that the acute temperature and cooling rate changes during DCT are mainly concentrated on the specimen surface region about 1/3 of the sample thickness. Subjected to DCT, the retained austenite of quenched specimen continues to transform to martensite and finally its phase volume fraction reduces to 2.3%. The predicted results are coincident well with the experimental data, which demonstrates that the numerical model employed in this study can accurately capture the variation characteristics of temperature and microstructure fields during DCT and provide a theoretical guidance for making the reasonable DCT procedure. 展开更多
关键词 deep cryogenic treatment boiling heat transfer coefficient finite element method phase transformation cold work tool steel
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FEM modeling of softened base metal in narrow-gap joint by CMT+P MIX welding procedure 被引量:2
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作者 舒凤远 吕耀辉 +4 位作者 刘玉欣 徐富家 孙哲 何鹏 徐滨士 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第6期1830-1835,共6页
A required finite element method(FEM) model applicable for narrow gap CMT and CMT+P MIX welding was established based on the interactions between arc,base metal and filler metal.A novel method of simplifying wire f... A required finite element method(FEM) model applicable for narrow gap CMT and CMT+P MIX welding was established based on the interactions between arc,base metal and filler metal.A novel method of simplifying wire feeding pulses and heat input pulses was supposed under the conduction of equivalent input.The method together with composed double-ellipse heat sources was included in the model.The model was employed in the investigation of thermal cycling and the identification of the softened zone of AA7A52 base plates.Low-frequency behavior emerged in the form of low-cooling rate sects,which were not expected under experimental conditions.The softened zone including the quenched zone and averaging zone of the base plate was much wider internal the base plate than that close to the surfaces.The reliability of the predictions in thermal cycling was supported by infrared imaging test results of the thermal cycle process. 展开更多
关键词 cold metal transferring finite element method equivalent input low-cooling rate sects softened zone
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Effects of Reducing Mn^(2+),Cu^(2+) and Zn^(2+) Concentrations in Nutrient Solution on SOD Activity in Grafted Cucumber Seedling Leaves Under Cold Stress
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作者 李涛 高俊杰 于贤昌 《Agricultural Science & Technology》 CAS 2011年第11期1625-1627,1679,共4页
[Objective] The research aimed to study the effects of reducing the concentrations of Mn2+, Cu2+ or Zn2+ in nutrient solution on the contents of Mn, Cu and Zn of grafted cucumber leaves as well as on the SOD and is... [Objective] The research aimed to study the effects of reducing the concentrations of Mn2+, Cu2+ or Zn2+ in nutrient solution on the contents of Mn, Cu and Zn of grafted cucumber leaves as well as on the SOD and isozymes activities and the rate of electrolytic leakage under cold stress. [Method] Nutrient solution containing low concentrations of Mn2+, Cu2+ or Zn2+ were used for cultivating the grafted cucumber seedlings for the cold treatment. [Result] The results indicated that reducing the concentrations of Mn2+, Cu2+ or Zn2+ in nutrient solution had declined the SOD activities in grafted cucumber leaves and increased the rates of electrolytic leakage. Mn2+ had shown the maximum influences, followed by Cu2+, and Zn2+ had shown the minimum influences. [Conclusion] Cold resistance of cucumber can be improved by changing the contents of Mn2+, Cu2+ or Zn2+ in nutrient solution. 展开更多
关键词 Grafted cucumber Microelement Cold stress SOD Rate of electrolytic leakage
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RESEARCH ON COLD EXPANDED HOLE WITH FEM
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作者 傅仕伟 王珉 左敦稳 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1998年第1期7-14,共8页
Because of the generated residual stress after applying cold expanded technique with split sleeve, fatigue life of joint hole in aircraft can be distinguishedly prolonged. To study residual stress around cold expan... Because of the generated residual stress after applying cold expanded technique with split sleeve, fatigue life of joint hole in aircraft can be distinguishedly prolonged. To study residual stress around cold expanded hole, some hypothesises such as small deformation in radial symmetry, plane stress, plane strain, uniform distribution pressure have been presented in most papers. However, accurate result cannot be gained based on these hypothesises. In order to overcome the shortage, a 3 dimensional model is proposed which takes into consideration of the effect on split sleeve and the different distribution pressure along thick direction of specimen. The stress distributions of cold expanded hole with split sleeve under loading or unloading, as well as under fatigue tension have been stu died. To reveal the advantage of cold expanding process with split sleeve, the expansion without split sleeve has also been studied and compared with the former. 展开更多
关键词 cold worked finite element residual stress PHOTOPLASTIC anti fatigue
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Preliminary Study on the Accumulation Characteristics of Mineral Elements in Potted Poa crymophila under Drought and Water Stress
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作者 李天才 曹广民 +2 位作者 林丽 李以康 柯浔 《Agricultural Science & Technology》 CAS 2017年第12期2216-2218,共3页
[Objective] This study was conducted to explain the mechanism of the accumulation characteristics of mineral elements in alpine grassland plants. [Method] Cultivated alpine grassland plant, Poa crymophila, was treated... [Objective] This study was conducted to explain the mechanism of the accumulation characteristics of mineral elements in alpine grassland plants. [Method] Cultivated alpine grassland plant, Poa crymophila, was treated with drought and wa- ter stress, and then the samples were collected and analyzed. [Result] Compared with the control group, under drought and water stress, multiple mineral elements tended to accumulate and increase, and there were significant differences in the contents of Cu, Mn, Ni and P (P〈0.05). [Conclusion] Under drought and water stress, mineral elements in potted Poa crymophila tended to accumulate and in- crease, which is the adaption and response of Poa crymophila to drought and water stress, as well as the re-verification of the starvation effect hypothesis of mineral effects. The starvation effect of mineral elements is one of the endogenic forces for the accumulation and differentiation of mineral elements in grassland plants. 展开更多
关键词 Potted Poa crymophila Mineral elements Accumulation characteristic Drouaht: Water stress
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APPLICATION POSSIBILITY OF BINARY NONAZEOTROPIC REFRIGERANT IN JET REFRIGERATION *
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作者 张于峰 张利民 +1 位作者 李灿华 孙萍 《Transactions of Tianjin University》 EI CAS 1998年第1期26-30,共5页
This paper analyzes the possibility of applying binary nonazeotropic refrigerants in the jet refrigeration cycle. The thermodynamic cycle performance of two kinds of working pairs (R30/R142b, R30/R124) are calculated ... This paper analyzes the possibility of applying binary nonazeotropic refrigerants in the jet refrigeration cycle. The thermodynamic cycle performance of two kinds of working pairs (R30/R142b, R30/R124) are calculated using the EOS of PR equation of state, and the results are discussed. The theoretical calculations indicate that refrigerating quality can be improved if the binary mixtures evaporate just in the low temperature region. The character of the rejecter to compress two phase medium supports the possibility of this kind of cycle. 展开更多
关键词 jet refrigeration evaporating in low temperature region vapour liquid two phase compression binary nonazeotropic refrigerant
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An analytical model for predicting sheet springback after V-bending 被引量:8
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作者 ZHANG Dong-juan CUI Zhen-shan +1 位作者 CHEN Zhi-ying RUAN Xue-yu 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第2期237-244,共8页
Springback is caused by the redistribution of stress in sheet material after the tooling is removed. Precise prediction of sheet springback is very important in die design. Based on Hill’s yielding criterion and plan... Springback is caused by the redistribution of stress in sheet material after the tooling is removed. Precise prediction of sheet springback is very important in die design. Based on Hill’s yielding criterion and plane strain condition, an analytical model is proposed in this paper which takes into account the effects of contact pressure, the length of bending arm between the punch and die, transverse stress, neutral surface shifting and sheet thickness thinning on the sheet springback of V-bending. The predicted results by this analytical model indicated that the contact pressure and transverse stress have much effect on the springback when the bending ratio (the ratio of punch radius to sheet thickness) is less than five. The contact pressure declined when the length of bending arm goes up, which means that shorter length of bending arm will result in larger springback. The effect of neutral surface shifting on the springback is less than that of contact pressure and decreases with the bending ratio. However, this research showed that the influence of thickness thinning on the springback can be ignored. Comparison with finite element method (FEM) simu-lating results shows that the predicted results by the analytical model accord well with simulation results by FEM. In addition to that, the bending ability—the limit bending ratio for a given sheet thickness and material properties was also determined. 展开更多
关键词 SPRINGBACK V-bending Contact pressure Neutral surface shifting Transverse stress Bending ratio
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Protective Role of Ca Against NaCl Toxicity in Jerusalem Artichoke by Up-Regulation of Antioxidant Enzymes 被引量:38
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作者 XUE Yan-Feng LIU Ling +2 位作者 LIU Zhao-Pu S. K. MEHTA ZHAO Geng-Mao 《Pedosphere》 SCIE CAS CSCD 2008年第6期766-774,共9页
The ameliorative effect of external Ca^2+ on Jerusalem artichoke (Helianthus tuberosus L.) under salt stress was studied through biochemical and physiological analyses of Jerusalem artichoke seedlings treated with ... The ameliorative effect of external Ca^2+ on Jerusalem artichoke (Helianthus tuberosus L.) under salt stress was studied through biochemical and physiological analyses of Jerusalem artichoke seedlings treated with or without 10 mol L^-1 CaCl2, 150 mmol L^-1 NaCl, and/or 5 mmol L^-1 ethylene-bis(oxyethylenenitrilo)-tetraacetic acid (EGTA) for five days. Exposure to NaC1 (150 mmol L^-1) decreased growth, leaf chlorophyll content, and photosynthetic rate of Jerusalem artichoke seedlings. NaC1 treatment showed 59% and 37% higher lipid peroxidation and electrolyte leakage, respectively, than the control. The activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were decreased by NaCl, indicating an impeded antioxidant defense mechanism of Jerusalem artichoke grown under salt stress. Addition of 10 mmol L^-1 CaCl2 to the salt solutions significantly decreased the damaging effect of NaC1 on growth and chlorophyll content and simultaneously restored the rate of photosynthesis almost to the level of the control. Ca^2+ addition decreased the leaf malondialdehyde (MDA) content and electrolyte leakage from NaCl-treated seedlings by 47% and 24%, respectively, and significantly improved the activities of SOD, POD, and CAT in NaCl-treated plants. Addition of EGTA, a specific chelator of Ca2+, decreased the growth, chlorophyll content, and photosynthesis, and increased level of MDA and electrolyte leakage from NaCl-treated plants and from the control plants. EGTA addition to the growth medium also repressed the activities of SOD, POD, and CAT in NaCl-treated and control seedlings. External Ca2+ might protect Jerusalem artichoke against NaC1 stress by up-regulating the activities of antioxidant enzymes and thereby decreasing the oxidative stress. 展开更多
关键词 antioxidant enzymes CALCIUM Jerusalem artichoke lipid peroxidation salt stress
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Development of magnetocaloric materials in room temperature magnetic refrigeration application in recent six years 被引量:2
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作者 刘敏 俞炳丰 《Journal of Central South University》 SCIE EI CAS 2009年第1期1-12,共12页
Some magnetocaloric materials were used successfully in magnetic refrigeration application and became one of the critical parts of magnetic refrigeration technology whose delightful progresses were made worldwide in t... Some magnetocaloric materials were used successfully in magnetic refrigeration application and became one of the critical parts of magnetic refrigeration technology whose delightful progresses were made worldwide in the past 30 years. At the same time, the research on giant magnetocaloric materials will accelerate the development of room temperature magnetic refrigeration. In this paper, the new theoretical and experimental investigations on magnetic materials in room temperature application were described, including Gd and its binary and ternary intermetallic compounds, Mn-based compounds, La(Fe13-xMx)-based compounds and manganites. Based on the analysis of hysteresis, corrosion, cost and heat process, the comparison between different families of magnetic materials was discussed. Further research of room temperature magnetic refrigerant was suggested. 展开更多
关键词 magnetic material REFRIGERATION magnetocaloric effect magnetic resistance
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Quantitative evaluation of urban park cool island factors in mountain city 被引量:7
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作者 卢军 李春蝶 +2 位作者 杨永川 张歆晖 靳鸣 《Journal of Central South University》 SCIE EI CAS 2012年第6期1657-1662,共6页
Evaluating how park characteristics affect the formation of a park cool island(PCI) is the premise of guiding green parks planning in mountain cities.The diurnal variation of PCI intensity was achieved,and correlation... Evaluating how park characteristics affect the formation of a park cool island(PCI) is the premise of guiding green parks planning in mountain cities.The diurnal variation of PCI intensity was achieved,and correlations between PCI intensity and park characteristics such as park area,landscape shape index(LSI),green ratio and altitude were analyzed,using 3 010 temperature and humidity data from measurements in six parks with typical park characteristics in Chongqing,China.The results indicate that:1) the main factor determining PCI intensity is park area,which leads to obvious cool island effect when it exceeds 14 hm2;2) there is a negative correlation between PCI intensity and LSI,showing that the rounder the park shape is,the better the cool island effect could be achieved;3) regression analysis of humidity and PCI intensity proves that photosynthesis midday depression(PMD) is an important factor causing the low PCI intensity at 13:00;4) the multivariable linear regression model proposed here could effectively well predict the daily PCI intensity in mountain cities. 展开更多
关键词 park cool island park characteristics regression analysis photosynthesis midday depression statistical model
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Numerical simulation of freezing effect and tool change of shield machine with a frozen cutterhead 被引量:6
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作者 DAI Wei XIA Yi-min +1 位作者 XU Hai-liang YANG Mei 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第4期1262-1272,共11页
A shield machine with freezing function is proposed in order to realize tool change operation at atmospheric pressure. Furthermore, the transformation project of freezing cutterhead and tool change maintenance method ... A shield machine with freezing function is proposed in order to realize tool change operation at atmospheric pressure. Furthermore, the transformation project of freezing cutterhead and tool change maintenance method are put forward. Taking the shield construction of Huanxi Power Tunnel as an example, a numerical analysis of the freezing cutter head of the project was carried out. The results show that when the brine temperature is-25 °C, after 30 d of freezing, the thickness of the frozen wall can reach 0.67 m and the average temperature drops to-9.9 °C. When the brine temperature is-30 °C, after 50 d of freezing, the thickness of the frozen wall can reach 1.01 m and the average temperature drops to-12.4 °C. If the thickness of the frozen wall is 0.5 m and the average temperature is-10 °C, as the design index of the frozen wall, the brine temperature should be lower than-28 °C to meet the excavation requirements in 30 d. Analyzing the frozen wall stress under 0.5 m thickness and-10 °C average temperature condition, the tensile safety factor and compressive safety factor are both greater than 2 at the most dangerous position, which can meet the tool change requirements for shield construction. 展开更多
关键词 shield machine CONSTRUCTION frozen cutterhead tool change maintenance finite element simulation
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Design and Realization of Metadata Standard for Informationized Construction of the Auxiliary Shaft in Longgu Mine 被引量:1
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作者 TONGFeng-jian WULi-juan XIYan-tao 《Journal of China University of Mining and Technology》 EI 2005年第2期105-109,共5页
Based on the analysis of status quo of metadata technology and the informationized freezing construction of an auxiliary shaft in Longgu mine, the necessity and feasibility of applying metadata standards for informati... Based on the analysis of status quo of metadata technology and the informationized freezing construction of an auxiliary shaft in Longgu mine, the necessity and feasibility of applying metadata standards for informationized construction is discussed. The prototype of metadata standard for the construction is designed and established by using a modeling method, and the framework with XML/RDF for such standard is given. 展开更多
关键词 METADATA informationized construction freezing method Extensible Markup Language) Resource De- scription Framework
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Optimization on springback reduction in cold stretch forming of titanium-alloy aircraft skin 被引量:5
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作者 何德华 李东升 +1 位作者 李小强 金朝海 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第12期2350-2357,共8页
An optimization method was presented for cold stretch forming of titanium-alloy aircraft skin to determine process parameters and to reduce springback.In the optimization model,a mathematical formulation of stress dif... An optimization method was presented for cold stretch forming of titanium-alloy aircraft skin to determine process parameters and to reduce springback.In the optimization model,a mathematical formulation of stress difference was developed as an indicator of the degree of springback instead of implicit springback analysis.Explicit finite element method(FEM)was used to analyze the forming process and to provide the stress distribution for calculating the amount of the stress indicator.In addition,multi-island genetic algorithm(MGA)was employed to seek the optimal loading condition.A case study was performed to demonstrate the potential of the suggested method.The results show that the optimization design of process parameters effectively reduces the amount of springback and improves the part shape accuracy.It provides a guideline for controlling springback in stretch forming of aircraft skin. 展开更多
关键词 titanium alloy aircraft skin stretch forming SPRINGBACK OPTIMIZATION
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On Q Values and Other Energy Parameters for Superheavy Element Synthesis
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作者 ZHONG Xian-Hui LI Lei NING Ping-Zhi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第4X期679-683,共5页
Q value and optimal exciting energy of hypothetical superheavy nuclei in cold fusion reaction are calculated with relativistic mean field model and semiemperical shell model mass equation (SSME) and the validity of th... Q value and optimal exciting energy of hypothetical superheavy nuclei in cold fusion reaction are calculated with relativistic mean field model and semiemperical shell model mass equation (SSME) and the validity of the two models is tested. To give useful references for the experiments in the superheavy nuclei synthesized in cold fusion reactions,the Q value, fusion barrier and optimal exciting energy for the possible target plus projectile combinations suggested by Gupta et al. are calculated and the most possible target plus projectile combinations are pointed out according to our calculations. 展开更多
关键词 superheavy nuclei cold fusion Q value
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Study on mechanism of circumferential cracks in cold-region tunnels 被引量:2
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作者 ZHOU Lincong ZHENG Yifeng LI Zhong 《Global Geology》 2010年第2期75-78,共4页
There exists frost damage in cold-region tunnels. The circumferential cracks affect the function of tunnels. Using three-dimensional finite element method, the authors analyzed the mechanism of circumferential cracks ... There exists frost damage in cold-region tunnels. The circumferential cracks affect the function of tunnels. Using three-dimensional finite element method, the authors analyzed the mechanism of circumferential cracks in cold-region tunnels It is proved that the internal thermal stress in lining exceeds the tensile strength of concrete, which is the direct cause for circumferential cracks occurring. The laws of thermal stress in lining induced by parameters such as temperature drop, horizontal drag coefficient and length of lining are analyzed. The conclusions are valuable to the design and construction of cold-region tunnels considering the thermal stress. 展开更多
关键词 TUNNEL cold region circumferential crack temperature stress
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The Makings of an Icon: Analysis of Photograph of Israeli Soldiers
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作者 Edna Barromi Perlman 《Journalism and Mass Communication》 2015年第6期298-308,共11页
This study analyses an iconic photograph of Israeli paratroopers, photographed in Jerusalem in 1967. It explores how visual and formal structural components in the image function in this photograph and how they contri... This study analyses an iconic photograph of Israeli paratroopers, photographed in Jerusalem in 1967. It explores how visual and formal structural components in the image function in this photograph and how they contribute to the process of creating an icon. It explores the mechanisms that exist in visual icons and addresses the question of why some press photographs turn into iconic images while other do not, and if there is a connection between the visual structural elements in the images and the way they are perceived by the public. The study discusses how this visual logic correlates with other elements such as public opinion and myths. 展开更多
关键词 Photographs icons SYMBOLS Israel SOLDIERS MYTHS ZIONISM
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The contribution of trace elements from seawater to chimneys:a case study of the native sulfur chimneys in the sea area off Kueishantao,northeast of Taiwan Island
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作者 刘长华 汪小妹 +2 位作者 靳新娣 曾志刚 陈镇东 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2009年第1期162-171,共10页
Hydrothermal fuid containing abundant matter erupts from seafloor, meets ambient cold seawater and forms chimneys. So the main matter origins of chimneys are seawater and matter which are taken by hydrothermal fluid f... Hydrothermal fuid containing abundant matter erupts from seafloor, meets ambient cold seawater and forms chimneys. So the main matter origins of chimneys are seawater and matter which are taken by hydrothermal fluid from deep reservoir. However, because of seawater's little contribution to the forming of chimneys, it is usually covered by the abundant matter which is taken by hydrothermal fluid. Therefore, chimneys formed in ordinary deep elements, cannot be used to study the seawater's seawater hydrothermal activity, containing complex contribution to their formation. While the native sulfur chimneys, formed by hydrothermal activity near the sea area off Kueishantao, are single sulfur composition (over 99%), and within chimneys distinct layers are seen. Different layers were sampled for trace element determination, with Inductively Coupled Plasma Mass Spectrometry (ICP-MS). By analyzing the data, we consider C-layer (secondary inner-layer) as the framework layer of the chimney which formed early (Fig.4), and its trace elements derive from hydrothermal fluid. While the trace elements within A, B, D layers have undergone later alteration. A, B layers are affected by seawater and D layer by hydrothermal fluid. The increase of trace elements of A and B layers was calculated using C layer as background. Based on the known typical volume of chimneys of the near sea area off Kueishantao, we calculated the volume of seawater that contributed trace element to chimneys formation to be about 6.37×10^4 L. This simple quantified estimate may help us better understand the seafloor hydrothermal activity and chimneys. 展开更多
关键词 seafloor hydrothermal activity CHIMNEY native sulfur trace element
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Stability Analysis of Spatial Cubic Spline Geometric Nonlinear Beam Element Considering the Second-Order Effect
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作者 陆念力 赵欣 张宏生 《Journal of Donghua University(English Edition)》 EI CAS 2011年第4期396-399,共4页
To analyze the stability problem of spatial beam structure more accurately, a spatial cubic spline geometric nonlinear beam dement was proposed considering the seeond-order effect. The deformation field was built with... To analyze the stability problem of spatial beam structure more accurately, a spatial cubic spline geometric nonlinear beam dement was proposed considering the seeond-order effect. The deformation field was built with cubic spline function, and its curvature degree of freedom (DOF) was eliminated by static condensation method. Then we got the geometric nonlinear stiffness matrix of the new spatial two.node Euler-Bernouili beam dement. Several examples proved calculation accuracy of the critical load by meshing a bar to one element using the method of this paper was equivalent to mesh a bar to 3 or 4 traditional nonlinear beam dements. 展开更多
关键词 geometric nonlinear static condensation cubic spline beam element Euler-Bernoulli beam element
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Studies on Thermal Contraction of Crankshaft Bearings under Extreme Low Temperatures 被引量:4
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作者 Sever-Alexandru Haba Gheorghe Oancea 《Journal of Thermal Science》 SCIE EI CAS CSCD 2015年第5期496-501,共6页
This paper presents how the contractions of the main components of a V6 motor with low engine displacement are determined for the cold-start phase under extreme low temperature. Internal combustion engine components h... This paper presents how the contractions of the main components of a V6 motor with low engine displacement are determined for the cold-start phase under extreme low temperature. Internal combustion engine components have complex geometries and to obtain the thermal contractions, in the research, used the method of finite element analysis. The phenomena of thermal contractions are studied for the cold-start situations at extreme low temperature, knowing that the cold-start phase of an internal combustion engine is the main factor that determines moving rotational and translational parts wear life. Checking the proper choice of clearance is particularly important, as the use of inappropriate values of it leads to rapid operation destruction of the engine group components. The results obtained for the thermal clearances of crankshaft bearings are mathematically modeled and the relations can be used for calculating the clearances. The mathematical models are also useful for implementing in different software tools. 展开更多
关键词 ENGINE Engine block Crankshaft bearings Thermal contraction FEA
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