管状对称阻尼减振降噪结构的优化

OPTIMIZATION FOR VIBRATION-NOISE DAMPING REDUCTIVE STRUCTURES WITH TUBULAR SYMMETRICAL SHAPES

管状对称阻尼减振降噪结构有着结构损耗因数值大、用途广泛的优点，然而也存在着其结构参数互为耦连、参数不易合理选取的难题。建立了间隔及非间隔弹性约束层式管状对称结构的几何参数模型，对单阻尼层和多阻尼层式结构的几何参数及其对结构损耗因数的贡献开展了研究，并对该类结构进行了参数优化。把理论研究成果应用于轻轨列车转向架减振降噪装置的开发中。按照实用条件进行扫频动态试验，对结构优化模型进行试验验证并对开发出的装置进行了性能试验。结果表明，试验数据与理论模型有着良好的吻合性。

：There are larger loss factor values and wider application advantages with regard to the vibration-noise damping reductive structures with tubular symmetrical shapes. But on the other hand, there also are intractable problems on which the structural parameters are tightly coupled each other and the parameters are hard to be selected reasonably. In order to solve the problems, structural parametric models in which the structures are possessed of spacing-element and non-spacing-element types with tubular symmetrical shapes are established. The characteristics of structural parameters and their effects to structural loss factors are analyzed for the types of structures with single and multiple damping layers, and the optimizations are carried out as for the parameters. A new type of damping vibration-noise damping reductive equipment, which is applied to the steering mechanisms in urban light trains, is developed according to above research conclusions. And the tests are performed in terms of their realistic working conditions. The dynamic tests using frequency sweep methods are performed for the equipment so that optimized structural models are tested and verified and the performances of the equipment are examined. The results show that the both of testing data and theoretic models are better coincidence.