离散分布式动力吸振器的设计及在船舶工程中的应用

Design and Application of Multiple Tuned Mass Damper for Ships

用动力吸振器控制设备的振动,对质量比有一定的要求,在工程实践中(如潜艇,飞机,车辆等),由于空间的限制,安装一个大型动力吸振器十分困难。将一个动力吸振器改为若干个较小的动力吸振器,构成所谓的“离散分布式”动力吸振器(MTMD)则容易得多。本文讨论离散分布式动力吸振器的抑振特性。分析结果说明,在小范围内符合特定非线性间隔调谐频率的离散分布式动力吸振器不仅能更好地适应空间的限制条件,而且具有更宽的消振频带和更稳定的抑振效果,在失谐条件下的减振效果也比单个动力吸振器要好,并给出了分布式动力吸振器的优化设计方法及船舶工程应用实例。

It is well known that a certain mass ratio is required for obtaining good vibration depression when tuned mass damper (TMD) are used. However it is difficult to mount a heavy TMD in submarine, airplane, vehicle and so on. A capable measure is to divide one TMD into several smaller ones. this results in the concept of multiple tuned mass dampers, i.e. MTMD. The analytic results presented in this paper show that when distributed tuned frequencies corresponding to MTMD are within a small range, but not at an exact point, better vibration reductions can be achieved with more wide frquency range and more stable effect. This is much more suitable for practice. The optimal design method of MTMD and its application example are given. O