Static Topology Optimization and Dynamic Characteristics Analysis of 6000T Compression-Shear Test Machine Frame

Genshang Wu,Beibei Cui,Jinlong Yu,Zhanshu He,Chao Li,Yanmin Li,Jinggan Shao,Shusen Zhao,Fabio Di Trapani

doi:10.1155/2021/6954576

Genshang Wu, Beibei Cui + Show 7 more

Open Access

https://doi.org/10.1155/2021/6954576

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Abstract

This work aims to achieve the 6000t compression-shear test machine frame design with the lightweight. The force condition of the compression-shear test machine frame under limited working conditions is first analyzed, and the static analysis of the compression-shear test machine frame is performed using ABAQUS. Then, taking the volume of the frame of the compression-shear testing machine as the constraint condition, the topology optimization of the compression-shear testing machine frame is performed using the variable density method of topology optimization, and the model is reconstructed accordingly. Finally, not only the static characteristics of the frame before and after optimization but also the modal characteristics of the frame before and after optimization and the dynamic characteristics after sudden unloading are compared and analyzed. The results show that the weight of the frame decreases by 14.5% after optimization, and the maximum static stress of the frame is still less than the yield strength of the material; the maximum displacement is still less than the allowable maximum displacement, which meets the requirements of static strength and stiffness. The natural frequency of each mode is much greater than the working frequency, which meets the requirements of dynamic stiffness. After sudden unloading, the maximum dynamic stress of beams, columns, and base of the frame are less than the yield strength of materials, which meets the requirements of dynamic strength.

Highlights

Domestic and foreign scholars performed topology optimization and mechanical analysis on different types of test machines using finite element software, so as to achieve the test machines with the lightweight
Wang et al [6] performed static and modal analysis of the electrohydraulic servo test machine column using Hyper Mesh software and performed the topology optimization based on the analysis results. e results showed that the optimized column still met the requirements of static strength and dynamic stiffness, and the weight reduced by 6.58%
Wang et al [16] proposed a new topography optimization method called “windowed progressive structure optimization algorithm” and established the tie rod-compression rod model reflecting the working mechanism of the structure. e results showed that the topological optimal solution obtained by the windowed progressive structure optimization algorithm can better represent the internal stress state of the structure; by the optimization method, the opening ratio of I-beam structure is increased by 5.5 times compared with the experimental design, the ultimate load is increased by 1.2 times, but the amount of steel reduced by 30%

Summary

Introduction

Domestic and foreign scholars performed topology optimization and mechanical analysis on different types of test machines using finite element software, so as to achieve the test machines with the lightweight. Sensitivity analysis can obtain the variation relationship between the structural response and design variables of the compression-shear testing machine frame, which can significantly improve the optimization efficiency.

Results

Conclusion