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弛张筛面动态特性数值模拟及参数优化 被引量:10

Numerical simulation of dynamic characteristics and parameter optimization of flip-flow screen surface
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摘要 针对弛张筛筛面破损问题,考虑筛面的装配形式和工况条件,建立实际安装状态下的筛面有限元分析模型,分析工作条件下筛面不同位置的变形及应力分布;将响应面法与优化技术相结合,以安装半径和弯折角度为设计变量,通过中心复合试验设计,构建反映筛面设计参数与筛面应力关系的二阶响应面近似模型,分析各设计变量对筛面工作应力的影响规律;结合目标规划优化方法和NSGA-Ⅱ遗传算法对响应面近似模型进行寻优,获得筛面最佳几何参数。研究结果表明:筛面剪切应力主要分布在弯折区域中心部位;优化后,当弯折半径为22.5 mm,弯折角度为150°时,筛面剪切应力取得最小值,并较初始值降低12.6%。 Aiming to solve the problem about the damage of the screen mat of flip-flow screen,finite element analysis model of screen surface was established with consideration of the assembly form and working conditions of the screen surface.The distributions of deformation and stress at different positions on the screen surface under working conditions were analyzed.By combining the response surface method with the optimization technique and taking the installation radius and bending angle as the design variables,the second-order response surface approximate model reflecting the installation parameters and the stress of the screen surface was established through the design of the central composite test.The influence rule of the design variables on working stress of screen mat was analyzed.The response surface approximation model was optimized by combining the objective programming optimization method and NSGA-Ⅱgenetic algorithm,and the optimal geometric installation parameter was obtained.The results show that the shearing stress of screen surface is mainly distributed in the center of bending area.Through optimization,the minimal shearing stress is obtained when bending radius is 22.5 mm and the bending angle is 150°,12.6%lower than the initial value.
作者 武继达 刘初升 王振乾 江海深 邹梦麒 邱文强 WU Jida;LIU Chusheng;WANG Zhenqian;JIANG Haishen;ZOU Mengqi;QIU Wenqiang(School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou 221116,China;School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou 221116,China)
出处 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2019年第2期311-320,共10页 Journal of Central South University:Science and Technology
基金 国家自然科学基金资助项目(51775544 U1508210) 江苏省自然科学基金资助项目(BK20180650)~~
关键词 筛面 数值模拟 试验设计 响应面法 子模型 参数优化 screen surface numerical simulation experiment design response surface method sub-model parameter optimization
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