锻压技术

基于响应面分析法的开式预弯机轻量化设计

英文标题：Lightweight design of open prebending machine based on response surface methodology

作者：刘志刚管殿柱白硕玮张开拓

单位：青岛大学

关键词：预弯机轻量化设计响应面分析法 ANSYSWorkbench 有限元分析

分类号：TH122；TP319

出版年,卷(期):页码：2018,43(10):135-140

摘要：

针对一款公称力为22000 kN的开式液压预弯机，在生产前检测其机身结构设计是否满足变形与应力的要求，并且在此基础上降低安全系数以优化结构和进行轻量化设计，将其三维模型进行一定简化。在有限元分析软件ANSYSWorkbench中对预弯机进行静力学分析，确定最大变形量和应力集中分布的结构位置。将对预弯机最大应力影响较大的上横梁焊件和基座焊件的侧板及筋板等4个结构尺寸设为参数，以质量最小为优化目标，约束最大应力和最大变形以及结构尺寸，建立目标函数的优化数学模型。以响应面分析法对预弯机进行轻量化设计，通过中心复合设计产生49组实验数据，筛选和优化后结果显示预弯机质量减轻8330 kg，应力与变形满足设计和材料要求。

For an open hydraulic prebending machine with nominal force 22000 kN, the design of its body structure was tested before production to meet the requirements of deformation and stress, and based on these the safety factor was reduced to optimize the structure and carry out lightweight design, so that its 3D model was simplified to a certain degree. Then, the static analysis of the prebending machine was conducted by FEA software ANSYSWorkbench, and the location of the structure with the maximum deformation and stress concentration distribution was determined. Furthermore, four structural dimensions of side plate and rib plate for the upper beam weldment and the base weldment influencing on the maximum stress of the prebending machine greatly were set as parameters, the minimum weight was taken as the optimization objective to constrain the maximum stress, the maximum deformation and the structure size, and the optimization mathematical model of the objective function was established. Finally, the lightweight design of the prebending machine was carried out by the response surface methodology, and fortynine groups of experimental data were generated by the central composite design. After screening and optimization, the results show that the prebending machine weight reduces 8330 kg, and the stress and deformation meet the requirements of design and material.

基金项目：

国家自然科学基金资助项目(71701109)；山东省自然科学基金资助项目(ZR2017BG003)

刘志刚（1992-），男，硕士研究生，E-mail：lzg_178@163.com；通讯作者：管殿柱（1969-），男，硕士，教授，E-mail：gdz_zero@126.com

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