Abstract The low inherent damping for thin-walled structures often leads to prominent vibrational problem. This paper proposes a friction patch to enhance the damping for thin-walled structures. The damping patch is simple in structure and easy to adjust the normal preload. Based on a beam finite element model, parameters including geometry, stiffness and position of the proposed damper are optimized numerically. The steady-state response of the system is calculated by the DLFT in the frequency domain efficiently with high accuracy. The damping performance of the friction patch is quantified by the resonant amplitude for the target mode. The design guidelines summarized from numerical simulation are experimentally verified through a cantilever beam. Four optimized friction patches are implemented to a complex industrial thin-walled structure. Results show that the well-designed friction patches provide over 40% vibration reduction with less than 0.83% additional mass of the host structure for different modes.

中文翻译：

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用加速动态拉格朗日法设计薄壁结构干摩擦阻尼器

摘要 薄壁结构固有的低阻尼往往导致突出的振动问题。本文提出了一种摩擦片来增强薄壁结构的阻尼。阻尼片结构简单，易于调节正常预紧力。基于梁有限元模型，对所提出的阻尼器的几何、刚度和位置等参数进行了数值优化。系统的稳态响应由 DLFT 在频域中高效、高精度地计算。摩擦片的阻尼性能由目标模式的共振幅度量化。从数值模拟中总结的设计指南通过悬臂梁进行了实验验证。四个优化的摩擦片应用于复杂的工业薄壁结构。