基于有限元的轻量化焊接桁架结构优化设计  

Research on Stepwise Optimization Design of Welded Lightweight Truss Structure Base on Finite Element Analysis

作　　者：方超 施一丰 段宇航[1,2] 叶茂成 FANG Chao;SHI Yifeng;DUAN Yuhang;YE Maocheng(National Experimental Teaching Demonstration Center,Zhenjiang,Jiangsu 212003;School of Materials Science and Technology,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212003,China)

机构地区：[1]国家级实验教学示范中心,江苏镇江212003 [2]江苏科技大学材料科学与工程学院,江苏镇江212003

出　　处：《机电工程技术》2020年第3期124-127,共4页Mechanical & Electrical Engineering Technology

摘　　要：采用经验公式进行强度验算的传统方式已经不适应当前复杂化的桁架结构设计,通过ANSYS软件进行有限元模拟优化分析进行结构设计是新的技术手段。利用ANSYS Workbench软件,进行静态分析、屈曲分析和响应面分析,通过协同设计、逐步优化的方式,最终得到斜四棱柱式焊接桁架结构。通过瞬态分析对其最大承载力进行预测,结合实验验证了预测承载力的准确性。结果表明:基于ANSYS有限元优化的结构与试验焊接桁架的承载能力接近,对桁架结构失效变形预测准确;通过逐步优化的方式有效提高桁架结构单位质量的承载力,实现结构轻量化。The traditional method of strength checking by empirical formula was not suitable for the current complex truss structure design. It is a new technical method to carry out the structural design by ANSYS software for finite element simulation and optimization analysis. Using ANSYS Workbench software, static analysis, buckling analysis and response surface analysis were carried out. Through collaborative design and step-by-step optimization, the oblique quadrangular welded truss structure was finally obtained. The maximum bearing capacity was predicted by transient analysis, and the accuracy of prediction was verified by experiments. The results show that the load-carrying capacity of the structure optimized by ANSYS is close to that of the test welded truss, and the prediction of the failure and deformation of the truss structure is accurate;the gradual optimization method effectively improves the load-carrying capacity of the truss structure unit mass and realizes the lightweight of the structure.

关 键 词：桁架结构 逐步优化设计 有限元分析 轻量化设计 

分 类 号：TU311.41[建筑科学—结构工程]