CHEN Chui\|fu1, LAN Shuang1, YANG Xiao\|xiang1,  LIANG Wei1,2, WEI Tie\|ping3, YAO Jin\|hui2

(1. College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350000, China；

2. Fujian Metrology Institute, Fuzhou 350000, China; 3. Fujian Universtiy of Technology, Fuzhou 350000, China）

Abstract: Aiming at the problem that the weighing instrument load cantilever beam was too heavy,the operational principle of reaction force mechanism,the processing technology of cantilever and topology optimization methods were studied.Firstly,a statics analysis of reaction force mechanism was given by ANSYS software,cantilever topology optimization design was done based on SIMP theory. The topology optimization mathematical model under the displacement constraint was built. The design variables were updated by using optimization criteria method and the topology optimization problem was solved by using Tosca Structure. Statics analysis of the optimized reaction force mechanism was given.The results indicate that the optimized cantilever lighter by 19.8 percent,cantilever structure meet the strength requirements, and the maximum vertical displacement is 4.796 91 mm, it can guarantee the accuracy of the weighing instrument load.

Key words: topology optimization; displacement constraints; cantilever; SIMP