摘要
为了研究温度载荷和机械载荷对活塞应力应变的影响,基于有限元方法,采用UG和ANSYS Workbench软件,建立了无人水下航行器(UUV)特种发动机活塞3D有限元模型。在ANSYS Workbench中对活塞进行了热分析、静力学分析及热-固耦合分析,得到了活塞温度场、应力场及应变的分布。结果表明,受温度场的影响,热-固耦合中活塞的应力、应变明显比静力学分析中的大,且出现的位置也不尽相同。同时,在活塞结构的应力应变分析中,活塞头部易产生裂纹。仿真分析结果与试验测试结果有较好的一致性,为活塞的设计和优化提供了理论依据和参考。
To study the influences of temperature load and mechanical load on the piston stress and strain, a three-dimensional finite element model of the special engine piston for an underwater unmanned vehicle（UUV） is set up based on the finite element method by using the UG and ANSYS Workbench. The thermal analysis, static analysis and thermal-solid coupling analysis of the piston are performed on the ANSYS Workbench, thus the temperature field, stress field and strain distribution in the piston are obtained. The results show that under the influence of temperature, the stress and strain in the thermal-solid coupling analysis are larger than that in the static analysis, and their positions are different from those in static analysis. In addition, in the static stress/strain analysis of the piston, cracks usually appear first on the head of the piston. Simulation results show good consistency with the test ones.
出处
《鱼雷技术》
2013年第4期287-292,共6页
Torpedo Technology
