基于瞬态响应的柴油机缸盖多轴应力分析  

Multiaxial Stress Analysis of Diesel Engine Cylinder Head Based on Transient Response

作　　者：陈少林[1] 龙鑫[1] 杨迪[1] 张涛[1] 

机构地区：[1]湖南天雁机械有限责任公司增压器研究所,湖南衡阳421005

出　　处：《车用发动机》2012年第5期6-10,共5页Vehicle Engine

摘　　要：为了给缸盖的疲劳寿命预测提供准确的边界条件,以某型柴油机缸盖为研究对象,运用Ansys有限元分析软件,采用直接积分法对其进行了标定工况的瞬态计算,并将计算结果与有限元静力学分析结果进行了对比。考察瞬态计算得到的应力多轴状态,研究高应力梯度部位多轴应力的变化趋势,结果表明:气缸盖在工作时,结构上的多轴比例载荷与多轴非比例载荷状态共存。In order to provide the accurate boundary conditions for fatigue life prediction of cylinder head, the transient calcu- lation of rated condition for a diesel engine cylinder head was carried out with the direct integral method based on ANSYS FEA software and the calculated results were compared with the finite element statics results. The multiaxial stress state by transi- ent calculation was discussed and the variation tendency of multiaxial stress in the high-stress gradient location was researched. The results show that the states of structural multiaxial proportional load and multiaxial non-proportional load coexist when the cylinder head is working.

关 键 词：气缸盖 瞬态响应 直接积分法 多轴应力 

分 类 号：TK413.1[动力工程及工程热物理—动力机械及工程]