| 摘要:以6L23-30H型柴油机曲轴为例，采用有限元仿真软件对其进行有限元法分析和响应面法优化分析。建立曲轴三维仿真模型，根据曲轴实际受载情况施加载荷，进行柴油机第1、2、4缸发火3种工况的静力学分析，结果表明最大应力出现在主轴颈与曲柄臂间过渡圆角处，最大变形出现在连杆轴颈中心处。采用响应面法对曲轴进行结构优化分析，并选择遗传聚合法生成响应面，优化后的曲轴最大应力和最大变形分别减少11.26%和8.76%。通过优化模型验证响应面法对于柴油机曲轴结构优化设计的有效性和可行性，为进一步提高曲轴强度及其轻量化设计提供参考。 |
| 关键词: 曲轴 有限元法 响应面法 结构优化 |
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| Optimization of Marine Diesel Engine Crankshaft Based on Response Surface Method |
| YAN Ziteng,ZHOU Ruiping,LEI Junsong,MA Zhaozhao,HE Shuhao |
| School of Naval Architecture， Ocean and Energy Power Engineering， Wuhan University of Technology， Wuhan 430063， China;Shanghai Marine Equipment Research Institute， Shanghai 200031， China |
| Abstract:Taking the crankshaft of 6L23-30H diesel engine as an example，finite element simulation software was used to carry out finite element analysis and response surface optimization analysis.A 3D simulation model of the crankshaft was established，and the static analysis of the first，second and fourth cylinders of the diesel engine under three working conditions was carried out according to the actual load of the crankshaft.The results indicate that the maximum stress occurs at the transition fillet between the main journal and the crank web，the largest deformation occurs in the center of the connecting rod journal.The response surface method is used to optimize the structure of the crankshaft，and the genetic polymerization method is selected to generate the response surface.After optimization，the maximum stress and maximum deformation of the crankshaft are reduced by 11.26% and 8.76% respectively.The effectiveness and feasibility of the response surface method for the diesel engine crankshaft structure optimization design are verified by the optimization model，which can provide a reference for further improving the crankshaft strength and lightweight design. |
| Key words: crankshaft finite element method response surface method structure optimization |
