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Analysis of Temperature Field and Thermal Crown of Roll During Hot Rolling by Simplified FEM 被引量:14
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作者 GUO Zhong-feng LI Chang-sheng XU Jian-zhong LIU Xiang-hua WANG Guo-dong 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第6期27-30,48,共5页
Thermal crown of roll is an important factor, which affects strip profile. It is necessary to analyze the temperature field and thermal crown of roll for hot strip mill. A new simplified finite element method (FEM) ... Thermal crown of roll is an important factor, which affects strip profile. It is necessary to analyze the temperature field and thermal crown of roll for hot strip mill. A new simplified finite element method (FEM) was used to analyze the temperature field and thermal crown of roll, and corresponding models were built according to the practical boundary conditions. Transient roll temperature field and thermal crown were simulated by ANSYS FEM software with considering transient thermal contact and complex boundary condition. Temperature and thermal crown variations on roll surface nodes were obtained. The thermal crown results of roll obtained by FEM simulation were in good agreement with the measured data, indicating that simplified FEM models and results were correct. 展开更多
关键词 temperature field thermal crown fem roll
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Temperature field analysis and its application in hot continuous rolling of Inconel 718 superalloy 被引量:2
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作者 Fengli SUI Liqing CHEN +2 位作者 Xianghua LIU Lintao WANG Wei LI 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2009年第2期81-90,共10页
A coupled thermo-mechanical model containing metal flow and temperature field for calculating temperature variation has been developed on fourteen-pass hot continuous rolling of round rod for Inconel 718 alloy using 3... A coupled thermo-mechanical model containing metal flow and temperature field for calculating temperature variation has been developed on fourteen-pass hot continuous rolling of round rod for Inconel 718 alloy using 3D elastic-plastic finite element method (FEM). The temperature of characteristic analysis points in the intermediate cross-section of the workpiece has been simulated at initial temperature ranging from 960 to 1000 ℃ and initial velocity in range of 0.15-0.55 m·s^-1. Based on finite element analysis and microstructural observation in cylindrical hot compression experiments, the appropriate hot continuous rolling technologies have been designed for rod products with different diameters. For a real rolling practice, the simulated surface temperature was examined and is in good agreement with the measured one. 展开更多
关键词 Hot continuous rolling Elastic-plastic finite element method(fem Coupled analysis temperature field Inconel 718
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Effects of Process Parameters on the Temperature Field in Ti-6Al-4V Alloy Blade Precision Forging Process 被引量:2
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作者 Yuli LIU He YANG Tao GAO Mei ZHAN 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2006年第4期473-477,共5页
Blade precision forging is a high temperature and large plastic deformation process. Process parameters have a great effect on temperature distribution in billet, so in this paper, by taking a Ti-6Al-4V alloy blade wi... Blade precision forging is a high temperature and large plastic deformation process. Process parameters have a great effect on temperature distribution in billet, so in this paper, by taking a Ti-6Al-4V alloy blade with a tenon as an object, the influence of process parameters on the temperature distribution in precision forging process was investigated using 3D coupled thermo-mechanical FEM (finite element method) code developed by the authors. The results obtained illustrate that: (1) the gradient of temperature distribution increases with increasing the deformation degree; (2) with increasing the initial temperature of the billet, the zones of high temperature become larger, and the gradient of temperature distribution hardly has any increase; (3) friction factors have little effect on the distribution of temperature field; (4) with increasing upper die velocity, temperature of the billet increases while the temperature gradient in billet decreases. The results are helpful to the design and optimization of the process parameters in precision forging process of Ti-alloy blade. 展开更多
关键词 Ti-alloy blade Precision forging Process parameter temperature field Finite element method fem
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基于FDM/FEM的镁合金挤压铸造温度场数值模拟 被引量:6
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作者 赵宇宏 牛晓峰 侯华 《兵器材料科学与工程》 CAS CSCD 2011年第5期1-4,共4页
开发模拟挤压铸造凝固过程中温度场变化的有限差分/有限元计算模型,该模型包括凝固过程中的潜热释放。温度场模拟中采用交替隐式算法;应力场模拟中采用热粘弹塑性本构模型。为验证模型的正确性,对镁合金AM50A圆柱体实验件挤压铸造温度... 开发模拟挤压铸造凝固过程中温度场变化的有限差分/有限元计算模型,该模型包括凝固过程中的潜热释放。温度场模拟中采用交替隐式算法;应力场模拟中采用热粘弹塑性本构模型。为验证模型的正确性,对镁合金AM50A圆柱体实验件挤压铸造温度场变化过程进行模拟计算,模拟结果与实验结果基本一致。 展开更多
关键词 挤压铸造 温度场 数值模拟 FDM/fem
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一种新的基于FDM/FEM挤压铸造温度场计算模型 被引量:2
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作者 杨伟明 赵宇宏 +1 位作者 侯华 牛晓峰 《兵器材料科学与工程》 CAS CSCD 北大核心 2013年第1期25-28,共4页
根据挤压铸造特点,构建一种新的基于FDM/FEM的温度场计算模型,实现FDM网格直接转化为FEM网格。建立AM50A镁合金压力和熔化温度变化的关系曲线,修正熔化温度值及与温度有关的热物性参数,通过温度与热物性参数关系建立数据库,为解决大型... 根据挤压铸造特点,构建一种新的基于FDM/FEM的温度场计算模型,实现FDM网格直接转化为FEM网格。建立AM50A镁合金压力和熔化温度变化的关系曲线,修正熔化温度值及与温度有关的热物性参数,通过温度与热物性参数关系建立数据库,为解决大型复杂铸件FEM网格剖分困难的问题提供参考。选用AM50A镁合金进行挤压铸造实验,验证测量结果与模拟结果基本一致。 展开更多
关键词 挤压铸造 温度场 FDM fem
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FEM Simulation on Artificial Freezing of Seepage Ground 被引量:3
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作者 ZHOU Xiao-min 《Journal of China University of Mining and Technology》 EI 2005年第4期370-375,共6页
The coupling mechanism in freezing process of seepage ground was studied and a simplified coupling math model was proposed. The nonlinear and coupling problems of PDEs were well solved using the exponential function, ... The coupling mechanism in freezing process of seepage ground was studied and a simplified coupling math model was proposed. The nonlinear and coupling problems of PDEs were well solved using the exponential function, error function and normal distribution function, and a series of FEM equations of coupled fields of temperature and seepage were deduced and put forward. With the example of shaft ground freezing, the formation of freezing wall in seepage ground was simulated. 展开更多
关键词 Seepage field temperature field coupled fields fem simulation
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一种新的基于FDM/FEM挤压铸造温度场计算模型
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作者 杨伟明 赵宇宏 +1 位作者 侯华 牛晓峰 《铸造》 CAS CSCD 北大核心 2013年第3期222-225,229,共5页
构建了一种新的挤压铸造过程中基于FDM/FEM的温度场计算模型,从而实现将FDM网格直接转化为FEM网格,之后建立了AM50A镁合金压力变化和熔化温度变化的关系曲线,修正熔化温度值的大小,修正其他与温度有关的热物性参数,通过建立温度与热物... 构建了一种新的挤压铸造过程中基于FDM/FEM的温度场计算模型,从而实现将FDM网格直接转化为FEM网格,之后建立了AM50A镁合金压力变化和熔化温度变化的关系曲线,修正熔化温度值的大小,修正其他与温度有关的热物性参数,通过建立温度与热物性参数关系数据库,为解决大型复杂铸件FEM网格剖分困难的问题提供了一种参考。为了验证模型的正确性,选用AM50A镁合金进行挤压铸造实验,实际测量结果与模拟结果基本一致。 展开更多
关键词 挤压铸造 温度场 FDM fem
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FEM SIMULATION FOR LASER FORMING PROCESSING
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作者 L.Q.Li Y.B.Chen +1 位作者 X.Y Wang S.Y Lin 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2004年第3期317-322,共6页
Laser forming involves heating sheet metal workpiece along a certain path with adefocused laser beam directed irradiate to the surface. During laser forming, a tran-sient temperature fields is caused by the irradiatio... Laser forming involves heating sheet metal workpiece along a certain path with adefocused laser beam directed irradiate to the surface. During laser forming, a tran-sient temperature fields is caused by the irradiation and travelling of a laser beam.Consequently, thermal expansion and contraction take place, and allows the thermal-mechanical forming of complex shapes. This is a new manufacturing technique thatforming metal sheet only by thermal stress. Therefore, the analysis of temperaturefields and stress fields are very useful for studying the forming mechanism and con-trolling the accuracy of laser forming. The non--liner finite element solver, MARC, isemployed to solve the thermal--mechanical analysis. Using this model, the stress andstrain distribution of pure aluminum plate with different thickness are analyzed. Theinfluence of scanning speed on temperature fields and plastic strain of metal sheet un-der the condition of constant line energy are also presented. Numerical results agreewell with the experimental results. 展开更多
关键词 laser forming fem simulation temperature fields stress distributton
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基于FDM/FEM耦合的铸造热应力分析 被引量:4
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作者 孙凌宇 廖敦明 +2 位作者 屠曹富 陈涛 周建新 《铸造》 CAS CSCD 北大核心 2012年第7期737-741,746,共6页
使用华铸CAE铸造模拟软件模拟铸造过程的温度场,通过自主开发的温度转换模块,将华铸CAE计算的温度场结果转换为有限元温度载荷,并加载到ANSYS的有限元模型中,进行铸造热应力分析。使用ANSYS中的接触单元处理铸件与铸型之间力的相互作用... 使用华铸CAE铸造模拟软件模拟铸造过程的温度场,通过自主开发的温度转换模块,将华铸CAE计算的温度场结果转换为有限元温度载荷,并加载到ANSYS的有限元模型中,进行铸造热应力分析。使用ANSYS中的接触单元处理铸件与铸型之间力的相互作用,对典型应力框试件进行了热应力分析,并与自由收缩模型的计算结果进行了对比。结果表明,采用接触单元法的计算结果更为准确。 展开更多
关键词 FDM/fem耦合 应力场 温度转换 接触单元
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FEM网格对圆钢温度场计算结果的影响 被引量:9
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作者 李长生 刘相华 +5 位作者 王国栋 姜正义 钱平 熊尚武 谢建国 宋永祥 《钢铁》 CAS CSCD 北大核心 1998年第9期38-41,共4页
采用3种不同网格划分,用有限元方法对圆钢待轧过程温度场进行了解析,结果表明,采用均匀网格所解出的温度分布曲线亦匀称光滑,反之,若相邻网格的尺寸相差过大或畸形,则解出的温度场将在相应的局部出现反常的温度波动。
关键词 网格划分 温度场 有限元 圆钢 轧制
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重轨断面温度场的FEM模拟 被引量:1
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作者 胡盛德 杭乃勤 韩传伟 《武汉科技大学学报》 CAS 2003年第3期224-226,共3页
根据有限元分析原理,利用Fortran语言编制了重轨断面温度场的计算程序。通过采用变时间步长、调整传热计算参数和变换划分的网格数等优化算法,对武钢重轨(50kg/m)冷却温度场进行模拟计算,寻求到了一种高效省时的单元网格划分数和计算步... 根据有限元分析原理,利用Fortran语言编制了重轨断面温度场的计算程序。通过采用变时间步长、调整传热计算参数和变换划分的网格数等优化算法,对武钢重轨(50kg/m)冷却温度场进行模拟计算,寻求到了一种高效省时的单元网格划分数和计算步长。实验验证表明,计算结果与实验结果吻合良好。 展开更多
关键词 网格划分 温度场 有限元 重轨
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Numerical Simulation of Temperature and Stress Fields of Ti-Alloy Thin-well Barrel during Quenching Process 被引量:3
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作者 LIYan-zeng YANMu-fu WUKun 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第05B期769-771,共3页
The mathematical models have been established to describe the temperature and stress profiles in T16A14V cylinder during quenching. The residual stress and deformation of the workpiece can be predicted precisely based... The mathematical models have been established to describe the temperature and stress profiles in T16A14V cylinder during quenching. The residual stress and deformation of the workpiece can be predicted precisely based on ANSYS software. The simulated results show that the temperature of the divided element decreases faster at the edge than that at the internal of the workpiece during quenching from 1050 to 20°C. The largest temperature difference and dimension change in diameter are about 90°C and -0.935%, respectively. The position of largest tensile stress occurs around the edge of the cylinder. 展开更多
关键词 fem 温度场 应力场 数值模拟 淬火 钛合金
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COUPLED NUMERICAL SIMULATION ON COLD ROLLER'S TEMPERATURE FIFLD-PHASE TRANSFORMATION - STRESS FIELD DURING ITS QUENCHING PSOCESS 被引量:14
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作者 J. F. Gu J. S. Pan M. J. Hu and F. F. Shen (School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第1期254-262,共9页
Complicated changns occur inside the steel parts during quenching process. The abruptly changed boundary conditions make the temperature field,micro - structure and stress field change dramatically in very short ti... Complicated changns occur inside the steel parts during quenching process. The abruptly changed boundary conditions make the temperature field,micro - structure and stress field change dramatically in very short time, and these variables take a contact interactions in the whole process. In this paper, a three dimensional non - linear mathematical model for queeching process has been founded and the numerical simulation on temperature field,microstructre and stress field has been realized.In the FEM analysis, the incremental iteration method is used to deal with such complicated nonlinear as boundary nonlinear, physical property nonlinear,transformation nonlinear etc.The effect of stress on transformation kinetics has been considered in the calculation of microstructure. In the stress field anal- ysis,a thermo- elasto - plastic model has been founded, which considers such factors as transforma- tion strain,transformation plastic strain, themal strain and the effect of temperature and transforma- tion on mechanical propertier etc. The transient temperature field, microstructure distribution and stress field of the roller on any time can be displayed vividly,and the cooling curve and the changes of stress on any position can also be given. 展开更多
关键词 quenching phase transformation temperature field stress field finite element method (fem) numerical simulation
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Residual stress and welding distortion of Al/steel butt joint by arc-assisted laser welding-brazing 被引量:11
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作者 Chun-ling LI Ding FAN +1 位作者 Xiao-quan YU Jian-kang HUANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第4期692-700,共9页
The thermo-elastic.plastic finite element method(FEM)is used to simulate the thermo-mechanical behavior of Al/steel tungsten inert gas(TIG)arc-assisted laser welding-brazing(A-LWB)butt joint.The influence of material ... The thermo-elastic.plastic finite element method(FEM)is used to simulate the thermo-mechanical behavior of Al/steel tungsten inert gas(TIG)arc-assisted laser welding-brazing(A-LWB)butt joint.The influence of material nonlinearity,geometrical nonlinearity and work hardening on the welding process is studied,and the differences in the welding temperature field,residual stress and welding distortion by A-LWB and by single laser welding-brazing(SLWB)are analyzed.The results show that the thermal cycle,residual stress distribution and welding distortion by the numerical simulation are in good agreement with the measured data by experiments,which verifies the effectiveness of FEM.Compared with the SLWB,A-LWB can make the high-temperature distribution zone of weld in width direction wider,decrease the transverse tensile stress in the weld and reduce the distribution range of longitudinal tensile stress.And the welding deformation also decreases to some extent. 展开更多
关键词 arc-assisted laser welding-brazing(A-LWB) Al/steel finite element method(fem) temperature field residual stress welding distortion
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热轧H型钢不同冷却方式的温度场研究及优化
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作者 肖金福 白宇 +1 位作者 张宏亮 王卫卫 《山西冶金》 CAS 2024年第7期38-40,43,共4页
轧后对H型钢进行控制冷却,既能提高强度,又可以节约能源。为了改善热轧H型钢轧后冷却温度场,采用有限元数值模拟不同控冷工艺下的热轧H型钢温度场,并通过差别冷却方式获得相对均匀的温度场。结果表明,针对性地对H型钢圆角加强冷却后,H... 轧后对H型钢进行控制冷却,既能提高强度,又可以节约能源。为了改善热轧H型钢轧后冷却温度场,采用有限元数值模拟不同控冷工艺下的热轧H型钢温度场,并通过差别冷却方式获得相对均匀的温度场。结果表明,针对性地对H型钢圆角加强冷却后,H型钢断面整体温度分布比较均匀,6 s冷却后,腹板和圆角的温差小于45℃。 展开更多
关键词 H型钢 控制冷却 有限元 温度场
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FINITE ELEMENT ANALYSIS OF AXIAL FEED BAR ROLLING
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作者 C.G. Xu G.H. Liu G.S. Ren Z. Shen C.P. Ma W. W. Ren 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2007年第6期463-468,共6页
A flexible technique of hot working of bars by axial feed rolling was introduced. The process deformation, strain field, stress field, and temperature fie M of the parts are analyzed by finite element method ( FEM)-... A flexible technique of hot working of bars by axial feed rolling was introduced. The process deformation, strain field, stress field, and temperature fie M of the parts are analyzed by finite element method ( FEM)-simulation software DEFORM-3D. The material flow rule and tool load have been investigated. 展开更多
关键词 axial feed bar rolling DEFORMATION fem (finite element method) stress field strain feld temperature field
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RESEARCH ON INFLUENCE OF TEMPERATURE ON A PRECISION FORGING PROCESS OF BLADE WITH A TENON
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作者 Y.L. Liu H. Yang T. Gao M. Zhan W. Cai 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2005年第6期749-755,共7页
The blade precision forging process is a forming process with high temperature and large plastic deformation. Interaction of deformation and heat conduction leads to large uneven distribution of temperature. The uneve... The blade precision forging process is a forming process with high temperature and large plastic deformation. Interaction of deformation and heat conduction leads to large uneven distribution of temperature. The unevenness of temperature distribution has a great effect on mechanical properties and the microstracture of materials. So it is necessary to consider the influence of temperature on the precision forging process of blades. Taking a blade with a tenon into consideration, a 3D mechanical model in precision forging is built up. The distribution laws of temperature field and the influence of the temperature on the equivalem stress in the process are obtained by using 3-D coupled thermo-mechanical FEM code developed by the authors Theresuits obtained illustrate that the influence of the temperature field on the blade forging process is considerable. The achievements of predicting microstructure and mechanical properties for forged blades is significant. 展开更多
关键词 blade with a tenon precision forging equivalent stress field temperature field thermo-mechanical coupled 3D fem simulation
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Theoretical and experimental investigation of gas metal arc weld pool in commercially pure aluminum:Effect of welding current on geometry 被引量:2
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作者 Farzadi A Morakabiyan Esfahani M Alavi Zaree S R 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第11期2556-2564,共9页
Effects of welding current on temperature and velocity fields during gas metal arc welding(GMAW) of commercially pure aluminum were simulated. Equations of conservation of mass, energy and momentum were solved in a th... Effects of welding current on temperature and velocity fields during gas metal arc welding(GMAW) of commercially pure aluminum were simulated. Equations of conservation of mass, energy and momentum were solved in a three-dimensional transient model using FLOW-3 D software. The mathematical model considered buoyancy and surface tension driving forces. Further, effects of droplet heat content and impact force on weld pool surface deformation were added to the model. The results of simulation showed that an increase in the welding current could increase peak temperature and the maximum velocity in the weld pool. The weld pool dimensions and width of the heat-affected zone(HAZ) were enlarged by increasing the welding current. In addition, dimensionless Peclet, Grashof and surface tension Reynolds numbers were calculated to understand the importance of heat transfer by convection and the roles of various driving forces in the weld pool. In order to validate the model, welding experiments were conducted under several welding currents. The predicted weld pool dimensions were compared with the corresponding experimental results, and good agreement between simulation and preliminary test results was achieved. 展开更多
关键词 simulation modeling heat transfer fluid flow AA1100 aluminum alloy finite element method (fem) WELD POOL GEOMETRY temperature and velocity fieldS
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宽温域下偏转板电液伺服阀温度场特性
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作者 严成坤 刘小雪 +3 位作者 郑树伟 王生荣 冯东玲 訚耀保 《流体机械》 CSCD 北大核心 2024年第3期49-56,共8页
针对电液伺服阀在极端温度服役环境下复杂零件各部位的温度分布规律无法测量的难题,在工作介质温度为-40~140℃和环境温度为-55~250℃的工况下,建立了一种考虑传热过程的电液伺服阀及其精密部件的温度分析方法,取得了各零部件的温度分... 针对电液伺服阀在极端温度服役环境下复杂零件各部位的温度分布规律无法测量的难题,在工作介质温度为-40~140℃和环境温度为-55~250℃的工况下,建立了一种考虑传热过程的电液伺服阀及其精密部件的温度分析方法,取得了各零部件的温度分布规律及其影响因素。结果表明:力矩马达壳体以及阀体的外表面温度最为恶劣,温度接近环境温度,阀体从外表面到内部呈现温度梯度;阀芯、阀套与工作介质直接接触,温度状况较好;力矩马达从上至下具有较大温度梯度,如高温工况下温度差值约为66℃,其中弹簧管上、下温差约为45℃,反馈杆上、下温差约为26℃。较大的温度梯度极易造成材料刚度、偶件配合尺寸等变化,显著影响服役性能,在材料选择上需要充分考虑;环境温度显著影响力矩马达组件中不与工作介质接触的部分,且对磁性材料性能、气隙、线圈均产生明显影响;介质温度通常低于环境温度,与介质接触的零部件受环境温度影响较小。本文分析方法和结果可用于宽温域下电液伺服阀的设计与分析。 展开更多
关键词 偏转板伺服阀 宽温域 温度场 力矩马达 反馈杆组件
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Numerical Simulation on Temperature and Stress Fields in Beryllium During Cutting Process
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作者 董平 张鹏程 李瑞文 《Journal of Shanghai Jiaotong university(Science)》 EI 2011年第3期329-332,共4页
The temperature and stress fields in beryllium during high speed cutting process were studied by employing a thermo-mechanically coupled finite element method(FEM).The results show that the temperatures in beryllium i... The temperature and stress fields in beryllium during high speed cutting process were studied by employing a thermo-mechanically coupled finite element method(FEM).The results show that the temperatures in beryllium increase only a little during the cutting process.Both of the residual stresses for along and normal to the cutting direction are tensile stresses in the surface of beryllium after cutting.The cutting force and thrust force are about 280 and-250kN/m at the steady stage,respectively.The main effects of coolant on the cutting process are to decrease the friction coefficient and heat between the tool and the workpiece,so to reduce the temperature,but almost no effects are made for stress.This study is helpful to enhance the understanding for stress formation and optimize the process parameters of beryllium. 展开更多
关键词 BERYLLIUM temperature field stress field CUTTING finite element method(fem)
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