C-M-C模型在共振转换器线谱消减上的应用

Application of C-M-C Model in Line Spectrum Reduction of Resonance Changers

针对目前消减舰船轴系纵向振动线谱的共振转换器设计理论计算繁琐、实验耗时长的问题,采用Hypermesh软件对轴系及其共振转换器进行有限元建模,提出通过共振转换器的C-M-C(CBUSH-MASS-CBUSH)模型来模拟其质量、刚度和阻尼的并联结构的建模方法。探讨了改变共振转换器的质量比u和阻尼值c对轴系纵向振动减振的效果,定性分析C-M-C模型在不同质量比和阻尼值下的适用性,得到了随质量比和随阻尼值变化的加速度频率响应曲线。结果表明,C-M-C模型能很好的反映共振转换器的特性,且与实验结果基本吻合。C-M-C模型的使用,能为纵向振动调频减振提供一种有效的仿真分析方法。

In view of the cumbersome calculation and time-consuming experiment of the resonance changer design for reducing the longitudinal vibration line spectrum of the ship shafting system, the Hypermesh software is used to model the shafting system and its resonance changer. On this basis, the C-M-C (CBUSH-MASS-CBUSH) model of the resonance changer is proposed to simulate the parallel structure of mass, stiffness and damping. The effects of changing the mass ratio u and damping value c of the resonance changer on reducing the longitudinal vibration of the shafting are discussed. The applicability of C-M-C model under different mass ratios and damping values is qualitatively analyzed, and the acceleration frequency response curves vs. mass ratio and vs. damping value are obtained respectively. The results show that the C-M-C model can well reflect the characteristics of the resonance changer and its results are basically consistent with the experimental results. The use of the C-M-C model can provide an effective simulation analysis method for longitudinal vibration modulation and vibration reduction.