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首页> 外文期刊>Mechanical systems and signal processing >Segment-to-segment contact elements for modelling joint interfaces in finite element analysis
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Segment-to-segment contact elements for modelling joint interfaces in finite element analysis

机译：用于有限元分析中的联合界面建模的段到段接触元素

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摘要

This paper presents an efficient approach to model contact interfaces of joints in finite element analysis (FEA) with segment-to-segment contact elements like thin layer or zero thickness elements. These elements originate from geomechanics and have been applied recently in modal analysis as an efficient way to define the contact stiffness of fixed joints for model updating. A big advantage of these elements is that no global contact search algorithm is employed as used in master-slave contacts. Contact search algorithms are not necessary for modelling contact interfaces of fixed joints since the interfaces are always in contact and restricted to small relative movements, which saves much computing time. We first give an introduction into the theory of segment-to-segment contact elements leading to zero thickness and thin layer elements. As a new application of zero thickness elements, we demonstrate the implementation of a structural contact damping model, derived from a Masing model, as non-linear constitutive laws for the contact element. This damping model takes into account the non-linear influence of frictional microslip in the contact interface of fixed joints. With this model we simulate the non-linear response of a bolted structure. This approach constitutes a new way to simulate multi-degree-of-freedom systems with structural joints and predict modal damping properties.
机译：本文提出了一种有效的方法，可以在有限元分析（FEA）中使用段到段接触元素（例如薄层或零厚度元素）来建模接头的接触界面。这些元素源自地质力学，最近已在模态分析中用作确定模型更新的固定接头接触刚度的有效方法。这些元素的一大优势是，没有像主从联系人中那样使用全局联系人搜索算法。接触搜索算法对于固定关节的接触界面建模不是必需的，因为该界面始终处于接触状态，并且限于较小的相对运动，从而节省了大量计算时间。我们首先介绍导致零厚度和薄层元件的段到段接触元件的理论。作为零厚度元素的一种新应用，我们展示了结构接触阻尼模型的实现，该模型是从Masing模型导出的，作为接触元素的非线性本构定律。该阻尼模型考虑了固定接头接触界面中摩擦微滑动的非线性影响。使用此模型，我们可以模拟螺栓结构的非线性响应。这种方法构成了一种新的方法，可以模拟具有结构节点的多自由度系统并预测模态阻尼特性。

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