面向加工中心动态特性的立柱分析及优化设计

Analysis and Optimization of Vertical Column for Machining Center Dynamic Performance

针对加工中心机床VMC850B的立柱进行结构优化设计,提出了一种基于神经网络和遗传算法优化的结构设计方法。基于有限元设计方法,建立立柱的三维模型,并运用ANSYS软件对立柱进行静力学分析和模态分析,采用不同的遗传算法优化结果对立柱进行优化设计,对优化结果进行静动态特性分析。结果表明,在保证立柱刚度和稳定性的前提下,优化后立柱的一阶固有频率有不同程度的提高,有效改善了立柱的动态性能,提高了整机的稳定性,为机床的进一步优化提供了有效的理论依据。

A structural design method based on neural network and genetic algorithm optimization is proposed for the structure optimization design of the vertical column of the machine tool VMC850 B.Based on column the three-dimensional finite element method to design,model,and using the ANSYS software to column statics analysis and modal analysis,adopt different genetic algorithm optimization results to optimize a pillar design.After the optimization results are static and dynamic characteristics analysis,the results show that under the prerequisite of column stiffness and stability,the optimized pillar of first-order natural frequency have different degree of increase,effectively improve the dynamic performance of the columns and improve the stability of the machine,for machine tool provides effective theoretical basis for further optimization.