柴油机活塞的热及惯性力耦合研究  

Study on Thermal and Mechanical Loads and Thermal-Mechanical Coupled Load on Diesel Engine Piston

作　　者：吕彩琴[1] 苏铁熊[1] 

机构地区：[1]中北大学机电工程学院,山西太原030051

出　　处：《柴油机设计与制造》2008年第2期19-24,37,共7页Design and Manufacture of Diesel Engine

基　　金：山西省自然科学(20031042)

摘　　要：采用IDEAS软件研究了某型号柴油机活塞分别在热负荷作用下、惯性力作用下、以及在惯性力和热负荷共同作用下的强度及变形变化规律,热-机械负荷耦合下应力与变形的分布规律,找出了惯性力和热负荷对活塞应力与活塞变形所作的贡献。通过对原方案和改进后的方案比较,表明改进后活塞第一环内的温度明显降低,证明了改进设计的有效性,为该型号活塞的改进设计提供了依据。Studying was made by using IDEAS on the strength and distortion changes of a certain diesel engine piston under thermal load and mechanical load separately, and under thermal-mechanical coupled load; stress and distortion distribution under thermal-mechanical coupled load. Based on the study, the contribution of the mechanical and thermal loads to the stress and distortion was determined. The comparison analysis of original and improved design shows that the improved design can significantly reduced the temperatttre of the top ring, which demonstrates the effectiveness of the improvement and provides the theory base for the practical work.

关 键 词：活塞 热负荷 惯性力 耦合 

分 类 号：TK423[动力工程及工程热物理—动力机械及工程]