摘要
针对高精度衡器载荷测量仪反力机构的悬臂梁质量较大的问题,对高精度衡器载荷测量仪的工作原理、悬臂梁加工工艺和拓扑优化方法进行了研究。利用ANSYS对优化前的反力机构进行了静力学分析,基于固体各向同性材料(SIMP)理论对悬臂梁进行了拓扑优化设计,建立了悬臂梁拓扑优化数学模型,运用优化准则法更新了设计变量,求解了位移约束下悬臂梁体积最小的拓扑结构;利用Tosca Structure对建立的数学模型进行了求解,得到了满足设计要求的悬臂梁结构,最后对优化后的悬臂梁进行了静力学分析,并与优化前的分析结果进行了对比。研究结果表明,优化后悬臂梁减重19.8%,悬臂梁结构满足强度要求;且悬臂梁竖直方向最大位移量为4.796 91 mm,可以保证高精度衡器载荷测量仪检定的准确度,由此验证了新悬臂梁结构的可行性。
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.
出处
《机电工程》
CAS
2016年第4期383-387,共5页
Journal of Mechanical & Electrical Engineering
基金
国家重大科学仪器设备开发专项(2011YQ090009)
关键词
拓扑优化
位移约束
悬臂梁
SIMP
topology optimization
displacement constraints
cantilever
SIMP
