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Thermal-Structural Coupled Analysis of ITER Torus Cryo-Pump Housing
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作者 王松可 宋云涛 +1 位作者 谢韩 雷明准 《Plasma Science and Technology》 SCIE EI CAS CSCD 2012年第11期1011-1016,共6页
An ITER torus cryo-pump housing (TCPH), which encloses a torus cryo-pump, is connected to a vacuum vessel (VV) by a set of associated double bellows. There are complicated loads due to two different operating stat... An ITER torus cryo-pump housing (TCPH), which encloses a torus cryo-pump, is connected to a vacuum vessel (VV) by a set of associated double bellows. There are complicated loads due to two different operating states (pumping and regeneration) and foreseeable accidents with the cryo-pump. This paper describes a thermal-structural coupled analysis of the present TCPH according to tho allowatfle stress criteria of RCC-MR, in which the worst cases and outcomes of various load combinations are obtained. Meanwhile, optimization of the structure has been carried oul, to obtain positive analysis results and an adequate safety margin. 展开更多
关键词 ITER TCPH thermal-structural coupled analysis 1R CC-MR
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Numerical Simulation of Gear Heat Distribution in Meshing Process Based on Thermal-structural Coupling
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作者 Peixiang Xu Yihua Cao Wensong Nie 《Journal of Mechanical Engineering Research》 2019年第2期1-7,共7页
The thermal balance state of high-speed and heavy-load gear transmissionsystem has an important influence on the performance and failure of geartransmission and the design of gear lubrication system. Excessive surface... The thermal balance state of high-speed and heavy-load gear transmissionsystem has an important influence on the performance and failure of geartransmission and the design of gear lubrication system. Excessive surfacetemperature of gear teeth is the main cause of gluing failure of gear contactsurface. To investigate the gear heat distribution in meshing processand discuss the effect of thermal conduction on heat distribution,a finiteelement model of spur gear is presented in the paper which can representgeneral involute spur gears. And a simulation approach is use to calculategear heat distribution in meshing process. By comparing with theoreticalcalculation, the correctness of the simulation method is verified, and theheat distribution of spur gear under the condition of heat conduction isfurther analyzed. The difference between the calculation results with heatconduction and without heat conduction is compared. The research hascertain reference significance for dry gear hobbing and the same type ofthermal-structural coupling analysis. 展开更多
关键词 thermal-structural COUPLING TRANSIENT simulation Heat distribution
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Research on numerical welding experiment of a thick spherical shell structure
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作者 刘向东 姚熊亮 庞福振 《Journal of Marine Science and Application》 2008年第2期69-76,共8页
In this paper, in order to predict the residual deformation of thick spherical structure, a welding program is compiled in APDL language based on Ansys and a numerical welding experiment of a welding example is carrie... In this paper, in order to predict the residual deformation of thick spherical structure, a welding program is compiled in APDL language based on Ansys and a numerical welding experiment of a welding example is carried out. The temperature field of welding was simulated firstly, then a thermal-structure coupling analysis was carried out, and at last the residual stress and deformation after welding were got. After that, the numerical experiment result was compared with physical experiment one. The comparative analysis shows that the numerical simulation fits well with physical experiment. On the basis of that, a three-dimensional numerical experiment of a thick spherical shell structure was carried out to get the changing rule of stress and deformation of a thick spherical shell structure during welding. The research is of great value to the prediction of residual deformation and high precision machining. 展开更多
关键词 welding program thermal-structure coupling analysis residual stress residual deformation thick spherical shell structure
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Influence of Long-term Climate on Fatigue Life of Bridge Pier Concrete and a Reinforcement Method
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作者 Nam-Hyok Ri Kum-Hyok So +3 位作者 Yong-Sop Ri Zhiyao Ma Yong-Ae Kim Hui-Gwang Yun 《Hydro Science & Marine Engineering》 2019年第1期2-8,共7页
This paper quantitatively evaluated the fatigue life of concrete around the air-water boundary layer of bridge piers located in inland rivers,considering the long-term climate.The paper suggests a method to predict th... This paper quantitatively evaluated the fatigue life of concrete around the air-water boundary layer of bridge piers located in inland rivers,considering the long-term climate.The paper suggests a method to predict the low-cycle fatigue life by demonstrating a thermal-fluid-structural analysis of bridge pier concrete according to long-term climate such as temperature,velocity and pressure of air and water in the process of freezing and thawing in winter.In addition,it proposes a reinforcing method to increase the life of damaged piers and proves the feasibility of the proposed method with numerical comparison experiment. 展开更多
关键词 Hydraulic CONCRETE Bridge PIER CONCRETE depression failure Scour phenomenon Low-cycle fatigue life LONG-TERM CLIMATE thermal-structural ANALYSIS Fluid-structural ANALYSIS ANSYS
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Thermal-structural response and low-cycle fatigue damage of channel wall nozzle 被引量:3
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作者 Cheng Cheng Wang Yibai +2 位作者 Liu Yu Liu Dawei Lu Xingyu 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2013年第6期1449-1458,共10页
To investigate the thermo-mechanical response of channel wall nozzle under cyclic working loads,the fnite volume fluid-thermal coupling calculation method and the fnite element thermal-structural coupling analysis tec... To investigate the thermo-mechanical response of channel wall nozzle under cyclic working loads,the fnite volume fluid-thermal coupling calculation method and the fnite element thermal-structural coupling analysis technique are applied.In combination with the material lowcycle fatigue behavior,the modifed continuous damage model on the basics of local strain approach is adopted to analyze the fatigue damage distribution and accumulation with increasing nozzle work cycles.Simulation results have shown that the variation of the non-uniform temperature distribution of channel wall nozzle during cyclic work plays a signifcant role in the thermal-structural response by altering the material properties;the thermal-mechanical loads interaction results in serious deformation mainly in the front region of slotted liner.In particular,the maximal cyclic strains appear in the intersecting regions of liner gas side wall and symmetric planes of channel and rib,where the fatigue failure takes place initially;with the increase in nozzle work cycles,the residual plastic strain accumulates linearly,and the strain amplitude and increment in each work cycle are separately equal,but the fatigue damage grows up nonlinearly.As a result,a simplifed nonlinear damage accumulation approach has been suggested to estimate the fatigue service life of channel wall nozzle.The predicted node life is obviously conservative to the Miner's life.In addition,several workable methods have also been proposed to improve the channel wall nozzle durability. 展开更多
关键词 Channel wall nozzle Damage Life Low-cycle fatigue Reusable engine thermal-structural response
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Study of the thermal influence on the dynamic characteristics of the motorized spindle system 被引量:6
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作者 Song-Sheng Li Yuan Shen Qiang He 《Advances in Manufacturing》 SCIE CAS CSCD 2016年第4期355-362,共8页
The severe internal heat generation of the motorized spindle system causes uneven temperature dis- tribution, and will affect the vibration characteristics of the system. Based on the thermal analysis about the motori... The severe internal heat generation of the motorized spindle system causes uneven temperature dis- tribution, and will affect the vibration characteristics of the system. Based on the thermal analysis about the motorized spindle by finite element method (FEM), the thermal deformations of the spindle system are calculated by the thermal structure coupling simulation, and the thermal deformations of the rotor and the bearing units are extracted to analyze the bearing stiffness changes so that the modal characteristics of the rotor can be simulated in different thermal state conditions. And then the rotor thermal deformation experiment and the modal experiment of spindle by exciting with hammer are performed. The result shows that the thermal state of the motorized spindle system has a significant influence on the natural frequency of the rotor, which can be carefully treated when a spindle system is designed. 展开更多
关键词 Motorized spindle Thermal characteristic thermal-structure coupling Modal analysis Spindlesystem
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Experimental investigation of the thermally induced vibration of a space boom section 被引量:7
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作者 SU XinMing ZHANG JunHui +4 位作者 WANG Jing BI YanQiang QIE DianFu XIANG ZhiHai XUE MingDe 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2015年第4期58-66,共9页
Thermally induced vibration(TIV)is a typical failure of large-scale space structures.This paper reports a laboratory experiment that aims to investigate this unusual structural behavior of complex engineering structur... Thermally induced vibration(TIV)is a typical failure of large-scale space structures.This paper reports a laboratory experiment that aims to investigate this unusual structural behavior of complex engineering structures.With the help of a Fourier finite element program,the fixing of a space boom section is well designed so that the TIV can be successfully observed.Although the observed torsional vibration mode is different from the bending vibration mode predicted by the classic theory based on a simple beam model,it can be successfully explained by the general thermal structural interaction theory.This demonstrates the validity of the theoretical model and the necessity of using finite element program to analyze complex engineering structures. 展开更多
关键词 thermal-structural interaction VIBRATION EXPERIMENT
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Generation of Accelerated Stability Experiment Profile of Inertial Platform Based on Finite Element
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作者 CHEN Yunxia HUANG Xiaokai KANG Rui 《Chinese Journal of Aeronautics》 SCIE EI CSCD 2012年第4期584-592,共9页
The residual stress generated in the manufacturing process of inertial platform causes the drift of inertial platform parameters in long-term storage condition.However,the existing temperature cycling experiment could... The residual stress generated in the manufacturing process of inertial platform causes the drift of inertial platform parameters in long-term storage condition.However,the existing temperature cycling experiment could not meet the increased repeatability technical requirements of inertial platform parameters.In order to solve this problem,in this paper,firstly the Unigraphics(UG) software and the interface compatibility of ANSYS software are used to establish the inertial platform finite element model.Secondly,the residual stress is loaded into finite element model by ANSYS function editor in the form of surface loads to analyze the efficiency.And then,the generation based on ANSYS simulation inertial platform to accelerate the stability of experiment profile is achieved by the application of the analysis method of orthogonal experimental design and ANSYS thermal-structural coupling.The optimum accelerated stability experiment profile is determined finally,which realizes the rapid,effective release of inertial platform residual stress.The research methodology and conclusion of this paper have great theoretical and practical significance to the production technology of inertial platform. 展开更多
关键词 inertial platform residual stresses accelerated stability orthogonal experimental design ANSYS thermal-structural coupled analysis
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