| 摘要:基于活塞销与活塞销座表面型线几何型线及刚度的差异，在热载荷与机械载荷的作用下发生不协调形变，产生较大的局部接触应力，采用有限元法对某型船用柴油机活塞销孔结合面型线进行优化设计。通过对原活塞模型进行分析并与静载试验结果对比，找出应力集中位置；采用有限元软件和自行开发程序，实现活塞销-孔接触副型面的自动优化设计；最终从优化结果中选取最佳优化方案。优化后，活塞销孔型面应力集中显著降低，接触型面上最大Mises应力下降55.5%。 |
| 关键词: 船用柴油机 活塞组件 型线 应力集中 |
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| Automation of Contact Analysis Process and Research on Design ofContact Surfaces in Piston Components |
| Dong Chao,Wu Limin,Wang Yi,Li Mei,Li Jia,Cui Yi |
| Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai JiaoTong University,Shanghai 200240;Shanghai Marine Diesel Engine Research Institute,Shanghai 201108;Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai JiaoTong University,Shanghai 200240;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240 |
| Abstract:Due to the differences of the geometric profile and stiffness between the piston pin and the piston pin seat surface, there will be uncoordinated deformation under the action of thermal and mechanical load, which might produce high local contact stress. To solve this problem, FEA method was used to carry out optimum design on the piston pin-hole contact surface profile of a marine diesel engine. The original piston model was analyzed, and the results were compared with the static load test to find out the stress concentration position. By using commercial finite element software and the self-developed program, the automatic optimization design of the contact surface profile of piston pin-hole was realized. The best optimal scheme was selected based on the optimization results. After optimization, the stress at the contact surface of piston pin-hole was reduced remarkably, and the biggest Mises stress was reduced by 55.5%. |
| Key words: marine diesel engine piston component profile stress concentration |
