基于SQP的小尺寸大承载隔振弹簧优化设计

Optimum Design of Isolation Spring with Small Size and Large Bearing Capacity Based on Sequential Quadratic Programming

圆柱螺旋弹簧隔振器广泛运用于各类工程领域,然而当面对布置空间受限、承载较大的情况时,隔振弹簧需要进行系统的优化设计。针对某泵类设备隔振器小尺寸、大承载的顶层设计要求,借鉴高速动车组一系悬挂特征结构,选用了承载率较大的内外组合弹簧形式。然后,基于序列二次规划(SQP)的优化算法,对弹簧排布进行优化设计,得到2×2最优排布后,又对弹簧的中径、线径、圈数、高度等参数作了系统优化,最终得到满足各项设计要求的最优方案。结果表明:基于SQP优化算法,便捷高效,最大工作承载由37.9t优化到50t,提升幅度为32%,实现了隔振弹簧的小尺寸、大承载优化设计。相关研究可为小空间下大承载量的弹簧设计提供科学指导。

Cylindrical helical spring isolators have been found in wide application for vast kinds of engineering.However,when the space is limited and the load is large,isolation springs need to be optimized systematically.According to the design requirements for pump equipment isolator,which required small size and large bearing capacity,the basic form of combined spring were selected by using the structure of primary suspension.Then,based on the optimization algorithm of sequential quadratic programming(SQP),the spring arrangement was optimized.After that,the parameters of the spring,such as pitch diameter,wire diameter,number of circles and height,were optimized systematically.Finally,the optimal scheme to meet the design requirements was obtained.The results show that:The optimization algorithm based on SQP is convenient and efficient.The maximum working load is optimized from 37.9t to 50t,and the increase range is 32%,which realizes the optimum design of small size and large load of isolation spring.Relevant research can provide scientific guidance for spring design with high bearing capacity in small space.