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采用机壳和船体结构模型来试验减振垫的减振特性。上述模型中机器安装板和船体基座板的导纳,与一次部位板的谐振相比较,发现在低频时近似于刚性质量,而在高频时接近于无限大板。本文利用这些结论和有关的弹性垫作为无质量弹簧,对软质弹性垫和硬质弹性垫的减振特性和减少输入船体结构的振动能量的方法进行探讨。此外,也提出了一种新式的减振装置,即在上,下弹性垫之间插入一块阻尼板,并用上述提及的模型试验方法来验证其良好的减振特性。
The vibration damping characteristics of the vibration damping cushion were tested by using the shell and hull structure model. The admittance of the machine mounting plate and the hull base plate in the above model is found to be approximately rigid at low frequencies compared to the resonance of the primary plate and to infinite plates at high frequencies. Based on these conclusions and the related elastic pads as massless springs, this paper discusses the damping characteristics of soft elastic pads and hard elastic pads and the method of reducing the vibration energy input to the hull structure. In addition, a new type of vibration damping device has also been proposed by inserting a damping plate between the upper and lower elastic pads and verifying its good damping characteristics by the above-mentioned model test.