共查询到20条相似文献,搜索用时 46 毫秒
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齿轮接触应力和温度场分析 总被引:1,自引:0,他引:1
郁晗 《机械工程与自动化》2013,(5):50-52
为了得到齿轮啮合过程中轮齿接触面的接触应力分布及温度场分布,建立了啮合齿轮接触应力和温度的分析模型,采用赫兹接触理论对标准渐开线齿轮的接触应力分布进行分析,并通过有限元温度场分析方法对齿轮温度场的分布情况进行了分析;研究了啮合过程中轮齿接触点相对滑动速度、齿面摩擦因数及摩擦热流密度的计算方法,得到了啮合齿轮接触应力分布和温度场分布。 相似文献
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微动接触应力的有限元分析 总被引:7,自引:1,他引:7
以方足微动桥,试样接触几何条件为研究对象,应用ANSYS有限元分析软件对其接触面上的应力分布进行弹性有限元分析,验证用ANSYS所建计算模型的正确性,分别计算不同名义接触压力和不同摩擦因数条件下接触状态(粘着区、滑动区、张开区)和接触面应力分布,选取不同水平的循环载荷进行计算,研究接触状态和应力分布随循环载荷的变化情况。结果表明,微动疲劳过程中接触表面拉应力与剪应力在接触面的粘,滑交界区存在突变,微动疲劳裂纹正是在这一区域内萌生并扩展,计算结果与实验结果吻合很好。 相似文献
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通过建立合理的减速器齿轮有限元模型并计算接触应力,分析了齿轮接触应力的分布和最大应力,并将有限元计算结果与试验结果相比较,评价有限元计算结果的准确度,说明了有限元分析在齿轮接触问题上的有效性,为其他类型接触问题的分析提供了参考。 相似文献
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TOOTH CONTACT ANALYSIS OF CONICAL INVOLUTE GEARS 总被引:4,自引:1,他引:4
HE Jingliang Department of Mechanical Engineering Beijing Institute of Machinery Beijing China WU Xutang School of Mechanical Engineering Xi'''' an Jiaotong University Xi''''an China CUI Yahui School of Mechanical Engineering Xi'''' an University of Technology Xi''''an China NIE Gang School of Mechanical Engineering Xi'''' an Jiaotong University Xi'''' an China 《机械工程学报(英文版)》2006,19(1):105-108
The mathematical model of conical involute gears is developed based on the theory of gearing and the generating mechanism. Tooth contact analysis (TCA) is performed to examine the meshing and bearing contact of the conical involute gear pairs with intersected and crossed axes. In addition, the principal directions and curvatures of the gear surfaces are investigated and the contact ellipses of the mating tooth surfaces are also studied. Finally, the numerical illustrative examples are provided to demonstrate the computational results, test gears are made for tooth-bearing tests, and the conclusion is verified that the theory has the applicability. 相似文献
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FINITEELEMENTSOLUTIONTOCOUPLEDTHERMO-ELASTICCONTACTSTRESSANDIMPACTRESPONSEOFMESHINGGEARSLiRunfang;OuHengan(ChongqingUniversit... 相似文献
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涡壳温度场和热应力的有限元分析 总被引:1,自引:0,他引:1
涡壳的热应力是引起涡壳破坏的主要原因.在涡轮增压器新产品开发过程中,必须对涡壳的强度问题进行深入研究.采用有限元方法对涡壳的温度场和热应力进行非线性分析.在CATIA软件中进行几何建模和网格划分,然后在ANSYS中进行分析计算.分析结果表明,涡壳的温度在几秒钟内迅速升至最高温度,在冷却阶段又迅速冷却至350°F.而且涡壳的舌形挡板(Tongue)对温度变化比较敏感.涡壳的最大热应力发生在冷却初始时刻,此时舌形挡板的压应力最大,流道分隔墙(Divider)和V型圈边(V-band)区域受的拉应力也为最大.这些分析结果与涡轮增压器涡壳的实测结果有很好的一致性. 相似文献
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基于子结构技术的复杂齿轮系统有限元三维接触分析 总被引:10,自引:0,他引:10
基于子结构分析技术,建立了复杂齿轮系统的三维整体有摩擦弹性接触计算模型,用有限元参数二次规划法求解非线性部分,对其进行了比较全面、精细的有限元分析。以韶山7电力机车牵引齿轮系统为例,分析了齿轮啮合处接触状态(齿面相对滑动状态、齿面接触应力、齿面接触区域、齿向载荷分布)的变化规律。分析结果表明,齿轮系统的支承方式对齿轮齿面接触状态有较大影响。同时也说明,对于齿轮系统这种重复结构多的工程结构,子结构分析技术在解题规模和计算效率上都有优越性。 相似文献
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Du Xuesong Li Runfang Lin Tengjiao State Key Laboratory of Mechanical Transmission Chongqing University Chongqing China 《机械工程学报(英文版)》2005,18(4):473-476
Sealing analysis of sealing system in reactor pressure vessels is relevant with multiple nonlinear coupled-field effects,so even large-scale commercial finite element software cannot finish the complicated analysis.A finite element method of 3D transient coupled thermo-elastic-plastic contact sealing analysis for reactor pressure vessels is presented,in which the surface nonlinearity, material nonlinearity,transient heat transfer nonlinearity and multiple coupled effect are taken into account and the sealing equation is coupling solved in iterative procedure.At the same time,a computational analysis program is developed,which is applied in the sealing analysis of experimental reactor pressure vessel,and the numerical results are in good coincidence with the experimental results.This program is also successful in analyzing the practical problem in engineering. 相似文献
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METHODFORPRECISECALCULATIONOFROOTSTRESSOFSPIRALBEVELGEARSMETHODFORPRECISECALCULATIONOFROOTSTRESSOFSPIRALBEVELGEARSChenLiangyu... 相似文献
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ZHAO Xin JIN Xuesong ZHAI Wanming State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu China 《机械工程学报(英文版)》2007,20(3):18-23
A coupling thermo-mechanical model of wheel/rail in rolling-sliding contact is put forward using finite element method. The normal contact pressure is idealized as the Hertzian distribution, and the tangential force presented by Carter is used. In order to obtain thermal-elastic stress, the ther-mal-elastic plane stress problem is transformed to an elastic plane stress problem with equivalent fictitious thermal body force and fictitious boundary distributed force. The temperature rise and ther-mal-elastic stress of wheel and rail in rolling-sliding are analyzed. The non-steady state heat transfer between the contact surfaces of wheel and rail, heat-convection and radiation between the wheel/rail and the ambient are taken into consideration. The influences of the wheel rolling speed and wear rate on friction temperature and thermal-elastic stress are investigated. The results show the following: ① For rolling-sliding case, the thermal stress in the thin layer near the contact patch due to the friction temperature rise is severe. The higher rolling speed leads to the lower friction temperature rise and thermal stress in the wheel; ② For sliding case, the friction temperature and thermal stress of the wheel rise quickly in the initial sliding stage, and then get into a steady state gradually. The expansion of the contact patch, due to material wear, can affect the friction temperature rise and the thermal stress during wear process. The higher wear rate generates lower stress. The results can help under-stand the influence of friction temperature and thermal-elastic stress on wheel and rail damage. 相似文献