Evaluation of equivalent spring stiffness for use in a pseudo-rigid-body model of large-deflection compliant mechanisms
Evaluation of equivalent spring stiffness for use in a pseudo-rigid-body model of large-deflection compliant mechanisms
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DOI：
10.1115/1.2826843
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发表时间：
1996-03-01
影响因子：
3.3
通讯作者：
Norton, TW
中科院分区：
文献类型：
--
作者：
Howell, LL;Midha, A;Norton, TW
柔顺机构的部分或全部移动性来自其成员的灵活性，而不是仅仅来自刚体关节。为了充分利用柔顺机构的优点，需要更有效、更实用的分析和设计技术。为了满足这一需要，提出了一种与端承式几何非线性大挠度梁相对应的伪刚体模型概念。本文对拟刚体等效弹簧刚度进行了研究，提出了新的建模方程。其结果是简化了柔顺机构中大挠度构件的力/挠度关系的建模方法。所建立的模型对于大挠度系统运动的可视化，以及对柔顺机构设计的快速有效的评估和优化具有重要的价值。
Compliant mechanisms gain some or all of their mobility from the flexibility of their members rather than from rigid-body joints only. More efficient and usable analysis and design techniques are needed before the advantages of compliant mechanisms can be fully utilized In an earlier work, a pseudo-rigid-body model concept, corresponding to an end-loaded geometrically nonlinear, large-deflection beam was developed to help fulfill this need. In this paper, the pseudo-rigid-body equivalent spring stiffness is investigated and new modeling equations are proposed. The result is a simplified method of modeling the force/deflection relationships of large-deflection members in compliant mechanisms. The resulting models are valuable in the visualization of the motion of large-deflection systems, as well as the quick and efficient evaluation and optimization of compliant mechanism designs.