The determination and enhancement of compliant modes for actuation in structural assemblies
The determination and enhancement of compliant modes for actuation in structural assemblies
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DOI：
10.1016/j.ijsolstr.2016.11.006
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发表时间：
2017-02-01
影响因子：
3.6
通讯作者：
Morrison, Jonathan
中科院分区：
文献类型：
--
作者：
Bird, James;Santer, Matthew;Morrison, Jonathan
用于确定连接框架中的运动学和静力不确定性模式的线性代数方法被扩展以揭示在其他刚性装配中的柔顺模式。这些模式是通过奇异值分解从基于有限元的结构模型中提取的，并产生结构最容易变形的方式。这种模式方法还允许建立降阶结构模型，从而选择相关的模式并将其用作优化投诉结构的基础。通过对一个基于Kagome格子几何的结构的应用，证明了该方法是一种有用的设计工具。对于某些框架，一阶效应在激励下产生紧缩性。在此基础上，给出了一种考虑非线性影响的模式调整方案。(C)2016爱思唯尔有限公司。保留所有权利。
Linear algebra methods for determining modes of kinematic and static indeterminacy in jointed frames are extended to reveal modes of compliance in otherwise rigid assemblies. These modes are extracted from a structural model, based on finite elements, via a singular value decomposition and yield the ways in which a structure can be most easily deformed. This modal approach also allows for the formulation of a reduced-order structural model, whereby relevant modes are selected and used as the basis for the optimisation of a complaint structure. The method detailed is shown to be a useful design tool, demonstrated by its application to a structure based on the Kagome lattice geometry. For certain frameworks, first order effects produce tightening under actuation. As a result, a scheme to adjust the modes to take nonlinear effects into account is also given. (C) 2016 Elsevier Ltd. All rights reserved.