基于响应面法的导向筛管结构尺寸优化

Size Optimization of Guide Sieve Tubes Based on Response Surface Method

考虑导向筛管的材料非线性和横缝之间的接触非线性,采用有限单元法,建立了单节导向筛管双重非线性有限元模型。通过静力学分析,得到导向筛管应力分布状态和危险截面位置。采用响应面法对导向筛管的主要结构尺寸(横缝宽度、竖缝长度、竖缝宽度和两竖缝中心线的夹角)进行了优化,优化后的导向筛管强度满足要求,整体应力水平与原结构相比有所降低,转过的弧长增加了90.8%。

Considering the guide sieve tube’s material nonlinearity and contact nonlinearity between transverse joints,the finite element method was adopted to establish a double-nonlinear finite element model for the single-section guide sieve tube.Through static analysis,the sieve tube’s stress distribution state and the position of its dangerous section were obtained.Having the response surface optimization method used to optimize the sieve tube’s main structure size(i.e.the width of the horizontal seam,the length of the vertical seam,the width of the vertical seam and the included angle of the center line)to show that,the sieve tube’s strength optimized can meet requirements and its whole stress level,as compared to the original structure,has been decreased to some extent together with an arc length increased by 90.8%.