高效柴油机缸盖机械应力分析

目的研究缸盖结构改变对其应力大小及分布的影响．方法运用Ｉ－ＤＥＡＳＭａｓｔｅｒｓｅｒｉｅｓ４．０软件的建模及分析功能，根据各种不同单元模拟缸盖的实际情况，采用温度法描述螺栓预紧力，较为准确地反映其随爆发压力变化的情况。结果得出了缸盖在不同工况下的应力分布规律，在此基础上对三种设计方案的分析结果进行了对比，得出了优选结构。结论缸盖顶板与立壁之间的过渡状况、顶板与中板的形状等因素均影响缸盖的应力分布。

Investigation of Mechanical Stresses for Cylinder Head of High Power Diesel Engine

Aim To ivestigate the influence on the cylinder head's stress distribution and value caused by its structure's changes.Methods Three types of cylinder heads of high power diesel engines were analysed with finite element method using I-DEAS Master series software.The actual condition of the cylinder head was simulated with different kinds of elements.Tempera- ture method was used to exert the predeformation of the bolts to the finite element model,so the pretightening force was discribed accurately Results Stress distribution regularities of the cylinder head under different working conditions were taken On the basis,the analysing results ofthreeof design schemes were compared and the optimum structure was taken Conclusion Transition condition between the head plate and the standing board ,shape of the head plate and the jobbing sheet,etc will affect the cylinder head's bearing condition