Absolute Nodal Coordinate Formulation in a Pre-Stressed Large-Displacements Dynamical System

IF 1.2 4区工程技术 Q3 ENGINEERING, MECHANICAL

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-07-17 DOI:10.5545/SV-JME.2017.4561

Luka Skrinjar, J. Slavič, M. Boltežar

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引用次数: 10

Abstract

The design process for dynamical models has to consider all the properties of a mechanical system that have an effect on its dynamical response. In multi-body dynamics, flexible bodies are frequently modeled as rigid, resulting in non-valid modeling of the pre-stress effect. In this research a focus on the pre-stress effect for a flexible body assembled in a rigid-flexible multibody system is presented. In a rigid-flexible assembly a flexible body is modeled with an absolute nodal coordinate formulation (ANCF) of finite elements. The geometrical properties of the flexible body are evaluated based on the frequency response and compared with the experimental values. An experiment including the pre-stress effect and large displacements is designed and the measured values of the displacement are compared to the numerical results in order to validate the dynamical model. The pre-stress was found to be significant for proper numerical modeling. The partially validated numerical model was used to research the effect of different parameters on the dynamical response of a pre-stressed, rigid-flexible assembly.

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预应力大位移动力系统的绝对节点坐标公式

动力模型的设计过程必须考虑对其动力响应有影响的机械系统的所有特性。在多体动力学中，经常将柔体建模为刚体，导致对预应力效应的建模不有效。本文研究了刚柔多体系统中柔性体的预应力效应。在刚柔组合中，用有限元的绝对节点坐标公式(ANCF)对柔体进行建模。基于频率响应评价了柔性体的几何特性，并与实验值进行了比较。设计了包含预应力效应和大位移的试验，并将位移实测值与数值结果进行了比较，以验证动力学模型的有效性。发现预应力对正确的数值模拟具有重要意义。采用部分验证的数值模型，研究了不同参数对预应力刚柔组合体动力响应的影响。

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来源期刊

Strojniski Vestnik-Journal of Mechanical Engineering 工程技术-工程：机械

CiteScore

3.00

自引率

17.60%

发文量

审稿时长

4.1 months

期刊介绍： The international journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.