不同工况下柴油机活塞变形的三维有限元分析  

3-D finite element analysis of piston deformation under different operating conditions of diesel engine

作　　者：童宝宏[1] 张强[2] 

机构地区：[1]安徽工业大学机械工程学院,马鞍山243002 [2]首钢总公司技术质量部,北京100041

出　　处：《农业工程学报》2010年第9期159-163,F0002,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(50575065);安徽省高校优秀青年人才基金资助项目(2009SQRZ077)

摘　　要：为了考察各种工况因素对柴油机活塞工作时变形的影响情况,以某4105型号柴油机活塞为对象,采用三维有限元分析方法,分别就各种工况因素对活塞变形的影响进行分析。结果表明,在机械负荷作用下,随着柴油机负荷或转速的增加,活塞的变形也相应的增大,活塞的最大变形均发生在活塞主推力面裙部下沿位置;在热负荷作用下,随着柴油机负荷的增加,活塞的变形也相应的增大,而此时转速差异对活塞变形的影响不是很明显,整个活塞的最大热变形发生在活塞顶部靠近排气口一侧边缘;活塞在机械—热负荷耦合作用下的变形情况与在机械负荷作用下分析得到的结果相似。该结果可以为活塞的结构改进和优化设计提供参考依据。In order to make a survey of the influences on piston deformation from operating conditions of diesel engine,3-D finite element analysis of piston＇s deformation under different operating conditions was carried out combining with 4105 diesel engine.Results of simulation show that the deformation of the piston under the mechanical load will increase with the rising of diesel engine＇s load or rotating speed.And maximum deformation is near the edge of thrust side of piston skirt.Under thermal load,the deformation of the piston will also increase with the rising of diesel engine＇s load or rotating speed.However,influence from different rotating speed is not evident.And maximum deformation of the piston is near the edge of exhaust side of piston head.Analyzing result of influencing from the coupled thermal and mechanical load is similar to that from the mechanical load.The results are expected to provide supports for the further design and optimization of piston structure.

关 键 词：活塞 变形 ANSYS 热负荷 机械负荷 耦合负荷 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]