铰链
拓扑优化
块(置换群论)
刚度
拓扑(电路)
顺应机制
振动
计算机科学
结构工程
固有频率
模式(计算机接口)
工程类
数学优化
数学
有限元法
几何学
物理
电气工程
操作系统
量子力学
作者
Mark Naves,Dannis Michel Brouwer,Ronald M. Aarts
出处
期刊:Journal of Mechanisms and Robotics
[ASME International]
日期:2017-08-01
被引量:19
摘要
Large-stroke flexure mechanisms inherently lose stiffness in supporting directions when deflected. A systematic approach to synthesize such hinges is currently lacking. In this paper, a new building block-based spatial topology synthesis method is presented for optimizing large-stroke flexure hinges. This method consists of a layout variation strategy based on a building block approach combined with a shape optimization to obtain the optimal design tuned for a specific application. A derivative-free shape optimization method is adapted to include multiple system boundaries and constraints to optimize high complexity flexure mechanisms in a broad solution space. To obtain the optimal layout, three predefined three-dimensional (3D) “building blocks” are proposed, which are consecutively combined to find the best layout with respect to specific design criteria. More specifically, this new method is used to optimize a flexure hinge aimed at maximizing the frequency of the first unwanted vibration mode. The optimized topology shows an increase in frequency of a factor ten with respect to the customary three flexure cross hinge (TFCH), which represents a huge improvement in performance. The numerically predicted natural frequencies and mode shapes have been verified experimentally.
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