基于响应面法的地震仪调整平台结构优化

Structural Optimization of Seismometer Adjustment Platform Based on Response Surface Method

为便于实现地震仪调整平台的无人化安装及其水平度的调节,课题组采用响应面法对调整平台进行结构轻量化的设计。在对地震仪调整平台进行静力学分析以及结构参数化基础上,借助参数敏感度分析获得影响其质量、最大等效应力和最大位移形变的关键参数;利用二次多项式响应面法对调整平台进行相关响应面拟合;并采用MOGA遗传算法全局寻优;对优化前后的调整平台各指标进行对比分析。结果表明:优化后最大等效应力降低41%、薄弱方向的最大位移形变下降5.6%,同时质量降低了12.8%。该响应面优化设计不仅达到轻量化的效果,又提升了装置刚度和强度。

In order to easily implement the unmanned installation and levelness adjustment of the seismograph adjustment platform,a response surface optimization method for the lightweight of the adjustment platform structure was adopted.Based on the statics analysis and structural parameterization of the seismograph adjustment platform,the key parameters affecting its mass,maximum equivalent stress and maximum displacement deformation were obtained with the aid of parameter sensitivity analysis.The quadratic poly nomial response surface method was used to adjust the platform to the response surface fiting,and MOGA genetic algorithm was used for global optimization.A comparative analysis of the indicators of the adjustment platform before and after optimization was carried out.The results show that the maximum equivalent stress is reduced by 41%,the maximum displacement deformation in the weak direction is reduced by 5.6%,and the mass is reduced by 12.8%。This response surface optimization design not only achieves the effect of weight reduction,but also improves the stiffness and strength of the device.