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首页> 外文期刊>Journal of Vibration and Acoustics >Linear Finite Element Modeling of Joined Structures With Riveted Connections
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Linear Finite Element Modeling of Joined Structures With Riveted Connections

机译：铆接连接结构的线性有限元建模

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摘要

Riveted connections are widely used to join basic components, such as beams and panels, for engineering structures. However, accurately modeling joined structures with riveted connections can be a challenging task. In this work, an accurate linear finite element (FE) modeling method is proposed for joined structures with riveted connections to estimate modal parameters in a predictive manner. The proposed FE modeling method consists of two steps. The first step is to develop nonlinear FE models that simulate riveting processes of solid rivets. The second step is to develop a linear FE model of a joined structure with the riveted connections simulated in the first step. The riveted connections are modeled using solid cylinders with dimensions and material properties obtained from the nonlinear FE models in the first step. An experimental investigation was conducted to study accuracy of the proposed linear FE modeling method. A joined structure with six riveted connections was prepared and tested. A linearity investigation was conducted to validate that the test structure could be considered to be linear. A linear FE model of the test structure was constructed using the proposed method. Natural frequencies and corresponding mode shapes of the test structure were measured and compared with those from the linear FE model. The maximum difference of the natural frequencies was 1.63% for the first 23 out-of-plane elastic modes, and modal assurance criterion values for the corresponding mode shapes were all over 95%, which indicates high accuracy of the proposed linear FE modeling method.
机译：铆接连接广泛用于连接工程结构的基本组件，例如梁和面板。但是，使用铆钉连接对连接结构进行精确建模可能是一项艰巨的任务。在这项工作中，提出了一种用于铆接连接结构的精确线性有限元（FE）建模方法，以预测方式估算模态参数。所提出的有限元建模方法包括两个步骤。第一步是建立非线性有限元模型，以模拟实心铆钉的铆接过程。第二步是用第一步模拟的铆接连接建立连接结构的线性有限元模型。第一步使用实心圆柱体对铆钉连接进行建模，实心圆柱体具有从非线性有限元模型获得的尺寸和材料属性。进行了实验研究以研究所提出的线性有限元建模方法的准确性。准备并测试了具有六个铆钉连接的连接结构。进行了线性研究，以验证测试结构可以被认为是线性的。使用所提出的方法构建了测试结构的线性有限元模型。测量了测试结构的固有频率和相应的模式形状，并将其与线性有限元模型的频率进行了比较。前23个面外弹性模态的固有频率最大差为1.63％，相应模态形状的模态保证标准值均超过95％，这表明所提出的线性有限元建模方法具有很高的准确性。

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