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某重型变速箱端盖强度有限元分析及试验研究

FINITE ELEMENT ANALYSIS AND EXPERIMENTAL STUDY ON THE STRENGTH OF A HEAVY LOAD TRANSMISSION END CAP
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摘要 目前结构优化步骤一般是先有限元建模,后优化分析。为提高分析精度,进而确保结构优化结果的合理性,需要对有限元模型进行验证。针对我国某重载变速箱箱体左端盖进行有限元分析。根据有限元分析结果选取测点并实测载荷。用端盖实测载荷谱对有限元模型进行验证。经数据分析后发现,齿轮啮合产生的动态载荷是静态载荷的1. 1~2. 3倍左右,但是前期有限元分析却没有考虑动载的影响,这会导致端盖在服役过程中发生早期失效。最后结合间接获得的动载系数修正载荷的边界条件,使得修改后的有限元模型精度提高。为后期的优化设计提供了精确的模型。 The current structural optimization steps are the first finite element modeling,followed by optimization analysis.In order to improve the accuracy of the analysis and ensure the rationality of the structural optimization results,the finite element model needs to be verified. In this paper,finite element analysis is carried out for the left end cap of a heavy load transmission box in China. According to the finite element analysis results,the measured points are selected and the loaded is measured. The finite element model is verified by the measured load spectrum of the end cap. It is found that the dynamic load generated by the gear meshing is about 1. 1 to 2. 5 times of the static load,but the pre-finite element analysis does not take into account the effect of dynamic loading,which can lead to early failure of the end cap during service. Finally,the boundary condition of the load is modified by indirectly obtained dynamic load factor,which makes the modified finite element model more accurate. Which provides an accurate model for the later optimization design.
作者 姚瑶 于维一 赵礼辉 马炯 冯金芝 郑松林 YAO Yao;YU WeiYi;ZHAO LiHui;MA Jiong;FENG JinZhi;ZHENG SongLin(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Machinery Industry Key Laboratory for Mechanical Strength & Reliability Evaluation ofAuto Chassis Components,Shanghai 200093,China)
出处 《机械强度》 CAS CSCD 北大核心 2019年第1期133-140,共8页 Journal of Mechanical Strength
基金 国家自然科学基金项目(51375313,51705322) 上海市科技人才计划项目(14XD1420700) 上海市科委基础研究重点项目(13JC1408500) 上汽教育基金会项目(1624)资助.
关键词 端盖 有限元分析 模型验证 动载系数 End cap Finite element analysis Model validation Dynamic load factor
作者简介 姚瑶,女,1994年11月生,山西省原平市人,汉族。上海理工大学机械工程学院硕士研究生,研究方向为车辆结构强度与汽车轻量化设计理论;通讯作者:郑松林,男,1958年9月生,河南省温县人,汉族。上海理工大学机械工程学院教授,博士研究生导师,目前主要从事车辆结构强度与轻量化设计理论方面的研究,Email:songlin_zheng@126.com,Fax:+86-21-55270456。
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