Optimal structural frequency design of stiffened shell

摘要：

Frequency-aimed optimal structural design of stiffened shell is concerned. It is a reverse design problem for the first several modal frequencies to converge to a set of target value. A design method combined modified bi-directional evolutionary structural optimization (BESO) and size optimization is presented. Optimization model consists of skin and regular grid frame structure. To solve irregular branches and holes that often exist in ordinary topology optimization results, instead of elements, the existence states of ribs in the frame are used as design variables and sensitivity of the rib is discussed. Detailed design is conducted by size optimization. Example shows that frequency requirements are achieved. And the optimum structure is regular and clear, the localized modes problem is avoid. This is very suitable for designing airplane wind tunnel flutter test models.

关键词： Stiffened Shell Structural Frequency Optimization Reverse Design Problem BESO

作者: Dahai Mi Rui Yang Liang Zhou Yang Liu Dongming Guo

作者单位: School of Mechanical Engineering, Dalian University of Technology,Dalian, Liaoning province, 116024, China

会议类型: 国际会议

会议名称: 2011 International Conference on Mechatronics and Applied Mechanics(2011年机电一体化与应用力学国际会议 ICMAM 2011)

会议地点: 香港

会议语种:英文

页码: 1636-1639

在线出版日期: 2011-12-27（万方平台首次上网日期，不代表论文的发表时间）