Abstract:  Aiming at the vibration reduction problems of pipeline systems under high temperature， a high temperature mechanics model of the metal rubber coated damping structure of the pipelines was established by equivalent linearization method. The model was used for analyzing the stiffness and response amplitude of metal rubber treated with different temperatures. The thermal-vibration joint test system of the pipelines was set up firstly. Then the damping performance of the coated damping structure of the pipelines was verified with different ambient temperatures and metal rubber densities， where the insertion loss was taken as the evaluation index. The results show that reducing the density of metal rubber may effectively increase the vibration attenuation effectiveness of the pipelines. At the same time， the effect of the ambient temperature on the metal rubber coated damping structure is negligible， indicating that the coated damping structure may work well in a high temperature environment. 

Key words: high temperature, pipeline coating, metal rubber, mechanics model, insertion loss

摘要： 针对高温管路系统的减振难题，利用等效线性化方法建立了管路金属橡胶包覆阻尼结构的高温力学模型，分析了金属橡胶刚度和响应幅值随温度的变化规律。搭建了高温管路振动测试试验平台，以插入损失为评价指标，对不同环境温度、不同金属橡胶密度的管路包覆阻尼结构减振性能进行了试验验证。试验结果表明，减小金属橡胶密度能有效增加管路减振效果，环境温度对管路金属橡胶包覆阻尼结构的影响较小，说明金属橡胶包覆阻尼结构能很好地在高温环境下工作。

关键词: 高温, 管路包覆, 金属橡胶, 力学模型, 插入损失