锻压技术

2000 kN双动三梁四柱式高强度中厚板成形液压试验机上横梁结构轻量化优化设计

英文标题：Lightweight optimization design on upper crossbeam structure of 2000 kN double-action three-beam and four-column forming hydraulic testing machine for high-strength medium plate

作者：关铂镔1 2 崔学习3 张毅升1 吴向东2 万敏2

单位：(1. 中国运载火箭技术研究院空间物理重点实验室 2. 北京航空航天大学机械工程及自动化学院 3. 北京航天试验技术研究所

关键词：成形试验机不确定性优化区间不确定性概率不确定性可靠性优化设计结构优化

分类号：TH122

出版年,卷(期):页码：2024,49(7):138-148

摘要：

为解决成形试验机因结构笨重而导致的运输及安装不便的问题，提出了考虑概率和非概率不确定性的结构轻量化设计方法。分别利用概率和非概率模型表征不确定性，构建了上横梁确定性、概率可靠性和区间不确定性优化设计这3种模型。进一步，建立了上横梁装配体有限元模型，并构建了其强度和刚度响应面模型。基于可靠性灵敏度因子分析选取了不确定性因素，完成了3种结构优化设计模型并进行了详细对比。结果表明，确定性优化所得结构的可靠性低，概率可靠性优化所得结构易受假定的概率分布参数影响，区间不确定性优化能够得到优异结构并严格保证其可靠性，适合工程结构轻量化设计。最终，所提出的方法使成形试验机上横梁减重10.29%。

To solve the inconvenience problem of transportation and installation caused by heavy structure of forming testing machine, a structural lightweight design method considering probability and non-probability uncertainties was proposed, and the uncertainties were characterized by using probability and non-probability models. Then, three models for optimizing the design of upper crossbeam with certainty, probability reliability and interval uncertainty were constructed. Furthermore, the finite element model of upper crossbeam assembly was established, and its strength and stiffness response surface models were constructed. Finally, based on the sensitivity factor analysis of reliability, the uncertain factors were selected, and three structural optimization design models were completed and compared in detail. The results show that the reliability of the structure obtained by deterministic optimization is low, and the structure obtained by probabilistic reliability optimization is easily affected by assumed probability distribution parameters. Excellent structures can be obtained by interval uncertainty optimization and its reliability is stricthy guaranteed, which is suitable for the lightweight design of engineering structures. Ultimately, the proposed method results in a weight reduction of 10.29% for the crossbeam on the forming testing machine.

基金项目：

国家自然科学基金资助项目 (51875027)

关铂镔（1996-），男，博士，工程师 E-mail：2725385673@qq.com 通信作者：吴向东（1970-），男，博士，副教授 E-mail：wuxiangdongbuaa@163.com

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