一种基于后处理的自适应方法在活塞应力场、温度场分析中的应用

Post-Result-Based Adaptive Method and Its Application to Stress and Temperature Field Analysis for Engine Pistons

本文从工程角度出发 ,充分利用有限元分析后处理的结果 ,对单元误差均布的h型自适应网格划分算法进行了改进 ,使得精度要求在不同结构区域是自适应变化的 ,也就是在应力集中、温度梯度大的一些工程上较为重要的部位精度要求高一些 ,而在一些非关键部位精度要求则适当放宽。将这种方法运用于某发动机活塞应力场、温度场的自适应分析中 ,收得了较好的效果。

From an engineering viewpoint, the H version adaptive mashing algorithm is improved by the post result based adaptive method. It is proposed that the accuracy requirement should be adapted according to the behavior of the relative stress or temperature gratitude distribution across the entire domain, namely higher accuracy is required in critical regions where the stress concentrates or temperature gratitude is relative higher, while lower accuracy is pcrmittcd in insignificant rcgions. Bcttcr rcxults arc obtaincd whcn this approach is uscd to the stress and temperature field adaptive analysis for engine pistons.