基于多目标优化算法往复隔膜泵机座轻量化设计

LIGHTWEIGHT DESIGN OF THE BASE FOR RECIPROCATING PISTON DIAPHRAGM PUMP BASE ON MULTI-OBJECTIVE OPTIMIZATION ALGORITHM

隔膜泵机座结构的轻量化设计对隔膜泵加工、生产具有重要的影响。基于某型号隔膜泵机座结构展开研究,针对实际工作环境建立等效模型并进行有限元分析,根据分析结果定义设计变量,从而提高计算效率。采用均匀试验设计法进行试验设计,通过仿真拟合计算出设计变量与应力、变形量之间的关系,利用多目标优化算法对隔膜泵机座结构建立轻量化优化数学模型,在满足性能要求的前提下,使得一些材料得到合理配置,同时使得隔膜泵机座结构应力、变形量、固有频率尽可能小。对轻量化优化设计后的机座结构进行仿真分析,并与优化前结构进行对比。结果表明,轻量化后机座结构属性基本不变,且质量由25372 kg减少至24582 kg,减少了790 kg,减重效果较好,同时最大应力值减少了45.1%,最大变形量减少了12.3%,优化效果显著,为新型隔膜泵结构有限元分析与轻量化优化设计提供了基础支撑。

The lightweight design of diaphragm pump base structure has an important impact on the processing and production of diaphragm pump.Based on the research of the frame structure of a certain type of diaphragm pump,the equivalent model was established for the actual working environment and the finite element analysis was carried out.The design variables were defined according to analysis results to improve the calculation efficiency.The uniform test design method was adopted for the test design,and the relationship between the design variables and the stress and deformation was calculated through simulation fitting.The lightweight optimization mathematical model was established for the diaphragm pump base structure by using the multi-objective optimization algorithm.On the premise of meeting the performance requirements,some materials were reasonably configured,and the stress,deformation and natural frequency of the diaphragm pump base structure were as small as possible.The frame structure after the lightweight optimization design was simulated and analyzed,and compared with the structure before optimization.The results show that the structural properties of the engine base remain unchanged after lightweight,and the weight is reduced from 25372 kg to 24582 kg,with a weight reduction of 790 kg.The weight reduction effect is good,the maximum stress value is reduced by 45.1%,and the maximum deformation is reduced by 12.3%.The optimization effect is remarkable,which provides a basic support for the finite element analysis and lightweight optimization design of the new diaphragm pump structure.