In this paper, a symmetrically coated damping structure for entangled metallic wire materials (EMWM) of pipelines was designed to reduce the vibration of high temperature (300 °C) pipeline. A series of energy dissipation tests were carried out on the symmetrically coated damping structure at 20–300 °C. Based on the energy dissipation test results, the hysteresis loop was drawn. The effects of temperature, vibration amplitude, frequency, and density of EMWM on the energy dissipation characteristics of coated damping structures were investigated. A nonlinear energy dissipation model of the symmetrically coated damping structure with temperature parameters was established through the accurate decomposition of the hysteresis loop. The parameters of the nonlinear model were identified by the least square method. The energy dissipation test results show that the symmetrically coated damping structure for EMWM of pipelines had excellent and stable damping properties, and the established model could well describe the changing law of the restoring force and displacement of the symmetrically coated damping structure with amplitude, frequency, density, and ambient temperature. It is possible to reduce the vibration of pipelines in a wider temperature range by replacing different metal wires.

中文翻译：

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不同温度环境下管道对称涂层阻尼结构的耗能特性及参数辨识

本文设计了一种用于管道缠结金属线材（EMWM）的对称涂层阻尼结构，以减少高温（300℃）管道的振动。在20-300°C下对对称涂层阻尼结构进行了一系列能量耗散测试。根据能量耗散测试结果，绘制了磁滞回线。研究了EMWM的温度、振幅、频率和密度对涂层阻尼结构能量耗散特性的影响。通过对磁滞回线的精确分解，建立了带温度参数的对称涂层阻尼结构的非线性耗能模型。非线性模型的参数通过最小二乘法确定。耗能试验结果表明，对称涂覆的管道EMWM阻尼结构具有优良且稳定的阻尼特性，所建立的模型能够很好地描述对称涂覆阻尼结构的恢复力和位移随振幅、频率、密度和环境温度。通过更换不同的金属丝，可以在更宽的温度范围内减少管道的振动。