• CN：11-2187/TH
• ISSN：0577-6686

›› 2008, Vol. 44 ›› Issue (4): 201-205.

• 论文 •

### 利用植物根系形态形成机理的加筋薄壳结构拓扑优化设计

1. 上海理工大学机械工程学院;日本金泽大学自然科学研究科
• 发布日期:2008-04-15

### Topology Design Optimization of Stiffened Thin-wall Shell Structures Based on Growth Mechanism of Root System

DING Xiaohong;LIN Jianzhong;YAMAZAKI Koestu

1. College of Mechanical Engineering, University of Shanghai for Science and Technology
• Published:2008-04-15

Abstract: The growth mechanism of root system in nature is applied to the research of the topology design optimization technique for stiffened thin-wall shell structures. The process of the stiffener generation on a thin-wall shell structure can be regarded as a gradual growth process to achieve a global optimum by adapting to the local working condition, which is similar to the growth process of root system of plants. The design criterion of the stiffener layout on thin-wall shell structures is suggested on the basis of the growth mechanism of root system morphology, i.e., the growth direction and velocity of a stiffener are decided by its design sensitivity, which is the derivation of the strain energy with respect to its cross-sectional area in the case of the minimum compliance design problem. The numerical results of stiffened thin-wall cylindrical shell are illustrated, and validated by the finite element analysis. The suggested design method is simpler and more effective than the conventional methods, and it is more applicable to the practical problem because the result is legible distribution of the stiffeners rather than the vague density distribution. The design results can be used to the initial optimum models in the further detail design process.