| 摘要: |
| 提出一种面向力学域与制造域相结合的、采用成形制造工艺力学模型精确表征制造特征影响的先验设计方法，并结合先进的边缘约束无模旋压成形工艺阐述先验设计理论方法与设计流程。通过旋压工艺力学模型获取箱底结构的制造工艺特征，针对制造工艺特征建立内压稳定性分析模型，研究了旋压工艺特征对稳定性的影响，与传统的一阶模态缺陷、单点凹陷缺陷进行了对比。研究结果表明，先验设计方法能够较好地捕捉制造工艺特征引起的结构屈曲模态的改变，能够较准确地预测结构的极限承载能力。 |
| 关键词: 椭球箱底 缺陷敏感性 稳定性 先验设计 |
| DOI： |
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| 基金项目:“慧眼行动”项目湖南省科技创新计划 |
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| Priori Design Study on the Internal Pressure Stability of Spin Formed Aluminum Alloy Storage Tank Dome |
| HUANG Cheng,DUAN Yuhang,SUN Weizhao,LIANG Kaiming,ZHU Lijun,CHANG Xin |
| (Institute of Light Alloys, Central South University, Changsha 410083, China;Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China) |
| Abstract: |
| This paper proposes a priori design method which combines the mechanical domain and the manufacturing domain, the mechanics model of the manufacturing process is established for the accurate characterization of the influence of manufacturing features, and combined with advanced edge-constraint die-less spinning forming technology, the prior design theory method and design process are illustrated. The manufacturing process characteristics of the dome structure are obtained through the mechanical model of the spinning process, and the internal pressure stability analysis model including the manufacturing process characteristics is established. The influence of the manufacturing process characteristics of the spinning process on the stability is studied, compared with the traditional first-order defects and single-point radial perturbation defects methods. The research indicate that priori design method can effectively predict the variation of the structural buckling mode caused by manufacturing features, and can accurately predict the ultimate loading capacity of the structure. |
| Key words: Ellipsoidal dome Imperfection sensitivity Stability Prior design |