Quantitative Validation of Dynamic Stiffening Represented by Absolute Nodal Coordinate Formulation
Quantitative Validation of Dynamic Stiffening Represented by Absolute Nodal Coordinate Formulation
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DOI：
10.1115/detc2009-86955
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Y. Sugawara;Ken Shinohara;N. Kobayashi
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文献类型：
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作者：
Y. Sugawara;Ken Shinohara;N. Kobayashi
近年来，由于对大结构的要求，各种大变形柔性结构常被应用于空间应用的展开机构中。有必要在发射前掌握它们的复杂行为，以尽可能避免失败。由于大变形和整体运动的动力学是特别重要的。为了克服地面对其动力学检测的困难，迫切需要一种强大的数值分析方法。近十年来，针对大变形柔性多体系统的绝对节点坐标公式（ANCF）方法得到了发展，并在实际应用中得到了多种应用。然而，目前还没有足够的研究将该方法与实验数据进行对比验证。特别是对大变形整体运动进行定量验证的研究较少。本文将动力加劲作为一种重要的整体运动进行研究。基于蚁群函数，建立了二维简单柔性梁的数学模型。为模拟柔性梁以一定角速度水平旋转的动态加筋过程，分析了其变形时程。然后，将数值分析结果与相应的实验数据进行了定量比较。©2009 asme
In recent years, various flexible structures which undergo large deformations are often applied to deployment mechanisms of space applications due to the requirements for a large structure. It is necessary to grasp their complex behaviors before the launch to escape failures as much as possible. The dynamics due to the large deformations and the overall motions are especially quite important. To overcome the difficulties of ground check about their dynamics, a powerful numerical analysis method is required strongly. In the past decade Absolute Nodal Coordinate Formulation (ANCF) method has been developed for the flexible multibody systems with large deformation and various applications have been applied to ANCF for practical use. However, there are not enough researches which validate the method by the comparison with experimental data. Especially, there are few study which conducts a quantitative validation of ANCF about overall motion with large deformation. In this paper, dynamic stiffening is focused on as one of the important overall motion. A mathematical model of two dimensional simple flexible beam is constructed based on ANCF. To simulate the dynamic stiffening by the derived model, the flexible beam is rotated horizontally in a certain angular velocity and the time history of the deformation is analyzed. Then, the results of the numerical analysis are compared with the data of corresponding experiments quantitatively.© 2009 ASME