基于ANSYS Workbench的龙门式折弯机机架模态分析及工作台拓扑优化

为研究龙门式折弯机的静力学性能及其在满载工作时机架的抗振性能,运用ANSYS Workbench对一款龙门式折弯机机架进行有预应力的模态分析,得到静力学分析结果和前6阶固有频率及对应振型。利用拓扑优化,对折弯机工作台进行去除材料的形状优化,根据拓扑优化云图修整形状尺寸,然后在Solid Works中对工作台模型进行重建,将优化后的模型再次导入ANSYS Workbench中进行预应力模态分析,对优化前、后机架的静力学性能和动态特性进行比较和分析。最终,优化后的工作台质量减轻了11.7%,最大等效应力也有所减小,并且,龙门式折弯机的抗振性能不会受到影响,确定了拓扑优化的可行性。

Modal analysis of frame and topology optimization of workbench for gantry bending machine based on ANSYS Workbench

In order to study the static properties of the gantry bending machine and its anti-vibration performance of frame during full load operation,pre-stress modal analysis of a gantry bending machine frame was processed using ANSYS Workbench.The static analysis results and the first six orders of natural frequencies and corresponding vibration modes of vibration were obtained.Using topology optimization,the shape of removed material for the bending machine workbench was optimized.The workbench model was reconstructed in SolidWorks after the shape was resized according to the topology optimization nephogram.The optimized model was imported into ANSYS Workbench again for pre-stress modal analysis,and the static properties and dynamic characteristics of the frame before and after optimization were compared and analyzed.The weight of the final workbench was reduced by 11.7%.The maximum equivalent stress was also reduced.And the anti-vibration performance of the gantry bending machine was not affected.The feasibility of topology optimization was determined.