摘要
为减轻焊条自动计量机构重量,提高结构的整体性能,采用有限元分析和结构拓扑优化方法对计量盘进行轻量化设计。确定了计量盘模型的材料和初始参数,分析出计量盘模型在正常运转时4个工况的受力模型,通过有限元静力学分析校核了计量盘在所有工况下的刚度。基于变密度法以结构柔度为目标函数,以应变能为优化约束条件建立了计量盘拓扑优化数学模型。将优化的模型简化处理后利用Lanczos迭代法表征振动特征值和激励响应进行模态分析。优化结果表明:计量盘的重量比原结构降低了48.4%,低阶固有频率降低,相同静载荷条件下,最大等效应力最大位移均有所增加,优化后模型仍满足结构刚度要求。焊条计量盘模型远离外部激励频率,轻量化效果较为明显。
In order to reduce the weight of the automatic welding rod metering mechanism and improve the overall performance of the structure,finite element analysis and structural topology optimization methods were used to design the lightweight metering disk.The material and initial parameters of the metering disk model were determined,and the force models of the metering disk model under 4 working conditions were analyzed during normal operation.The stiffness of the metering disk under all working conditions was checked through finite element statics analysis.Based on the variable density method,taking the structural flexibility as the objective function and the strain energy as the optimization constraint condition,the mathematical model of the metering disk topology optimization was established.After simplifying the optimized model,the Lanczos iteration method was used to characterize the vibration eigenvalue and excitation response for modal analysis.The optimization results show that the weight of the metering disk is 48.4% lower than the original structure,the low order natural frequency is reduced,the maximum equivalent stress and maximum displacement are increased under the same static load conditions,and the optimized model still meets the structural stiffness requirements.The electrode metering disk model is far away from the external excitation frequency,and the lightweight effect is obvious.
作者
徐向前
杨培静
Xu Xiangqian;Yang Peijing(School of Materials Science and Engineering,Xi'an Petroleum University,Xi'an 710065,China)
出处
《机电工程技术》
2023年第1期224-228,共5页
Mechanical & Electrical Engineering Technology
基金
西安石油大学研究生创新与实践能力培养计划项目(编号:YCS21213245)。
关键词
焊条自动计量机构
静力学分析
拓扑优化
模态分析
轻量化
automatic electrode measuring mechanism
static analysis
topology optimization
modal analysis
lightweight
作者简介
第一作者:徐向前(1979-),男,博士,副教授,研究领域为材料成型设备及其自动控制等;通信作者:杨培静(1998-),男,硕士研究生,研究领域为机械自动化和轻量设计。
