基于有限元的天平校准系统基座结构优化设计

在Solidworks环境下建立三维模型，运用有限元软件对基座结构进行动、静态性能分析，得到初始模型的性能参数.以最小质量为目标函数，以刚度、应力和频率为约束条件，建立数学模型.提出一种基于渐进结构优化法的拓扑优化方法，引入过滤函数来解决拓扑优化过程中容易出现的数值不稳定、数值分布呈棋盘模式的现象，保证计算结果的准确性.对拓扑优化后的模型重新分析计算后发现，其性能依然优异，基频提升26.7%，质量减少5.8%.

Optimization Design of Pedestal Structure of Balance Calibration System Based on Finite Element Method

The three-dimensional model is established in Solidworks,and the static and dynamic performance of the pedestal structure is analyzed by finite element software,which can help to get the performance parameters of the initial model.Based on the minimum-mass as the objective function,the mathematical model for topology optimization is established with the stiffness,stress and frequency as the constraint condition.For ensuring the accuracy of the calculation results,a method based on evolution structure optimization for topology optimization is presented and a filtering function is introduced in order to solve the numerical instability and checkerboard phenomenon in the topology optimization process.After analyzing the calculation of the topological optimized model,the structure performance is still excellent.As a result,the fundamental frequency increased by 27.6%,and the mass reduced by 5.8%.