基于反共振原理的管路吸振器调谐方法

Tuning Method for Pipeline Vibration Absorbers Based on Anti-resonance Principle

针对船用管路线谱振动传递的抑制问题,提出一种基于反共振原理的管路吸振器调谐方法。该方法利用吸振器带来的反共振物理特性,通过调谐动力吸振器固有频率,改变管路振动传递函数的反共振区域,使需要抑制的线谱频率处于该区域,从而改变管路振动传递特性,实现振动抑制。首先,介绍采用动力吸振器抑制管路线谱振动传递的策略。随后,针对船用管路提出动力吸振器的结构形式及其安装方式。其次,利用结构波理论,阐述基于反共振原理的调谐方法以及调谐步骤。最后,通过实验验证吸振器对某实船管路线谱振动传递的抑制性能。实验结果显示,调谐后的吸振器引入了反共振区域,有效降低了该线谱振动的传递。

The problem of line spectrum vibration transmission abatement of marine pipelines is studied.A tuning method for pipeline vibration absorbers(PVA)is proposed based on anti-resonance principle.In this method,the antiresonance feature of PVA is applied to change the anti-resonance zone of vibration transmission function of the pipeline by tuning the PVA natural frequency,so that the anti-resonance zone can cover the line spectrum frequency which is to besuppressed.Hence,the pipeline vibration transmission feature is improved and the vibration reduction is realized.First of all,the strategy of using PVAs for line spectrum vibration transmission reduction of pipeline is introduced,and the design of the PVAs and their installation for marine pipeline is presented.Then,the tuning method based on anti-resonance principle and tuning steps by means of structural wave theory is interpreted.Finally,the experimental validation of using PVAs to reduce the line spectrum vibration with a certain frequency is presented.Results show that this method can effectively reduce the line spectrum vibration transmission for the pipelines.