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系统存在共振响应时其振幅和薄弱环节的应变应主要取决于阻尼。通过声强分布,运转振型和模态振型分析以及噪声和振动的互谱分析可确定其动态薄弱环节,通过在该处粘贴约束阻尼结构可使整机的降噪任务减低七分之三。
When the system has resonance response, the amplitude and the strain of the weak link should mainly depend on the damping. Through dynamic analysis of sound intensity distribution, running vibration mode and mode shape analysis, as well as the cross-spectrum analysis of noise and vibration, the dynamic weakness can be determined. By affixing the constraint damping structure there, the noise reduction of the whole machine can be reduced by three-sevenths .