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Numerical prediction of damping in structures with frictional joints

机译：摩擦连接结构阻尼的数值预测

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摘要

In many vehicle and space structures, friction in bolted joints is the primary source of energy dissipation during vibrations. Several simplified finite element models have proven their capacity to describe the energy dissipation owing to micro-slip in joints. However, these simplified models require extensive physical testing in order to extract model parameters. This paper proposes a methodology based on non-linear FE-analysis of the loading on joints for numerical evaluation of the energy dissipation due to micro-slip. The methodology is extended to allow for computation of modal damping in vibrating structures. Presented applications include studies of an isolated joint as well as a more complex structure subjected to dynamic excitation.
机译：在许多车辆和空间结构中，螺栓连接处的摩擦是振动过程中能量耗散的主要来源。几种简化的有限元模型已经证明了其描述关节微滑动引起的能量耗散的能力。但是，这些简化的模型需要大量的物理测试才能提取模型参数。本文提出了一种基于非线性有限元分析的关节载荷的方法，用于数值评估微滑动引起的能量耗散。扩展了该方法，以允许计算振动结构中的模态阻尼。目前的应用包括对孤立关节以及经受动态激励的更复杂结构的研究。

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