Research on Optimization of Column Structure Design for Dynamic Performance of Machine Tool

doi:10.3901/JME.2016.03.161

Abstract

Abstract: Aiming at the optimization design of machine tool column structure which is weakest link, a method is presented based on topology optimization, ribs form selecting and layout, and size optimization. From kinetic analysis of the machine tool by finite element analysis (FEA), modal analysis and harmonic response analysis illustrate that the column structure is the key part to affect the dynamic performance of the machine tool. Taking the column as optimization object, its basic structure is designed by material distribution of topology optimization. Selecting the W ribs which have well bending stiffness and torsional stiffness to layout and optimize its sizes, the column structure is finally optimized. Analysis results demonstrate that the method effectively improve dynamic performance of the machine tool. On the premise of the column mass does not increase, 6 nature frequencies of the machine tool are increased with different degrees. The first nature frequency is increased by about 10%. The biggest resonance peaks of the machine tool in x direction are reduced by 49.8%, y direction 70.1%, z direction 66.2%.

Key words: column, dynamic performance, machine tool, size optimization, structure optimization, topology optimization

CLC Number:

TH113

LIU Chengying, TAN Feng, WANG Liping, CAI Zhaoyong. Research on Optimization of Column Structure Design for Dynamic Performance of Machine Tool[J]. Journal of Mechanical Engineering, 2016, 52(3): 161-168.

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