基于拓扑优化的离心式压缩机底座轻量化设计

Lightweight Design of Centrifugal Compressor Baseplate Based on Topology Optimization

大型离心式压缩机底座既要保证结构的刚度、强度,又要力求轻量化。应用ANSYS有限元分析软件对某离心式压缩底座的振动模态进行分析,基于得到的前6阶振动固有频率及对应的振动变形量数据进行了底座支撑肋板结构的拓扑优化。优化后,离心式压缩机底座的一阶振动频率与优化前相近,合理避开了离心式压缩机转速20%的共振区域频率,底座支撑肋板结构减重30.7%,底座减重8.9%,在保证底座刚度、强度足够的前提下实现了轻量化设计。研究结果可为离心式压缩机底座的设计和压缩机组的降本增效提供参考。

Baseplate of a large centrifugal compressor not only ensures structural rigidity and strength,but also requires light weight.ANSYS finite element analysis software package was used to complete the modal analysis of the centrifugal compressor baseplate.Based on the obtained natural frequencies of the first 6 orders and the corresponding vibration deformation data,the topological optimization of the support rib plate of the baseplate was carried out.After optimization,the first-order vibration frequency of the centrifugal compressor baseplate is similar to that before optimization,and the 20%resonance region frequency of the centrifugal compressor speed is reasonably avoided.The weight of the baseplate support rib plate is reduced by 30.7%,and the weight of the baseplate is reduced by 8.9%.The lightweight design is realized under the premise of ensuring that the rigidity and strength of the baseplate are sufficient.The study results have provided a theoretical reference for the design of centrifugal compressor baseplate,which aims at reducing cost and increasing effectiveness.