摘要
利用ANSYS Workbench建立了某高强化增压柴油机的活塞-缸套有限元耦合模型,通过插入命令流的方式完成边界条件的施加,由此得到了活塞的瞬态温度场,在此基础上计算了活塞的瞬态热应力。结果表明:活塞顶面2 mm深度范围内的瞬态温度场波动较为剧烈,但随着深度的增加趋于平缓;顶面瞬态热应力波动达到13.696 MPa,波动幅值较大,对活塞的疲劳寿命造成一定影响。
A coupling finite element model of certain turbocharged diesel engine piston and cylinder is established by using the software of ANSYS Workbench. The transient temperature filed is obtained by inserting the command flow into the boundary condition,and accordingly the transient thermal stress is calculated. The result shows that the transient temperature field fluctuation is active within 2 mm in depth on the piston top,but the fluctuation decreases with the increase of depth; the thermal stress fluctuation on the piston top reaches 13. 696 MPa,the level is higher,which affects the fatigue life of piston.
出处
《装甲兵工程学院学报》
2017年第2期44-47,共4页
Journal of Academy of Armored Force Engineering
基金
国家"973"计划项目
关键词
柴油机
活塞
有限元分析
瞬态温度场
瞬态热应力
diesel engine
piston
FEA
transient temperature filed
transient thermal stress
