基于磁流变弹性体的推进轴系半主动式吸振器研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (15) : 36-42.

论文

卢坤1，刘翎1，杨志荣2，龚兴龙3，饶柱石1，解忠良1

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Studyonsemi-active dynamic vibration absorber of ship propulsion shafting based on magnetorheological elastomer

Kun Lu1 ,Ling Liu1,Zhirong Yang2, Zhushi Rao1,Xinglong Gong3,Zhongliang Xie1

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摘要

根据船舶推进轴系纵振动力学特性，针对动力吸振器的减振机理进行研究，并对半主动式吸振器的设计参数影响规律进行理论分析。基于磁流变弹性体的剪切模量可由外加磁场控制的特性，设计了一种剪切刚度可调的半主动式吸振器，对其移频特性进行了试验测试，并在1:4的船舶轴系缩比模型上进行了变转速工况下吸振效果试验。实验结果表明，该吸振器具有12.3HZ的移频范围，移频特性曲线线性度良好；并且在不同转速下相比被动式吸振器均有更好的吸振效果，进一步验证了利用磁流变弹性体设计推进轴系半主动式吸振器的可行性。

Abstract

According to the dynamic characteristics of marine propulsion shafting, the vibration absorbing mechanism of dynamic vibration absorber wasstudied.And the dependence of semi-active dynamic vibration absorbers’ parameters on vibration absorptioneffect was analysed. Magneto-rheological elastomer (MRE) is a kind of smart materials,whose shear modulus could be controlled by external magnetic field. Based on thisproperty, a semi-active dynamic vibration absorber with adjustable stiffness was proposed.Its natural frequency-shift performance was tested. Furthermore,an experimental research on a model ship with scaled ratio 1:4was carried out to verify itsvibration absorption capacity.The results show that the designed MREs-SDVA with a frequency range of 12.3Hzperforms better than classic passive dynamic vibration absorbers under different rotating speeds. And the linearity of the frequency shift characteristic curve is excellent.The feasibility of using the MREs to design the semi-active vibration absorbers is further verified.

关键词

磁流变弹性体 / 推进轴系纵振控制 / 半主动吸振器 / 移频特性

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卢坤1，刘翎1，杨志荣2，龚兴龙3，饶柱石1，解忠良1. 基于磁流变弹性体的推进轴系半主动式吸振器研究[J]. 振动与冲击, 2017, 36(15): 36-42

Kun Lu1,Ling Liu1,Zhirong Yang2, Zhushi Rao1,Xinglong Gong3,Zhongliang Xie1. Studyonsemi-active dynamic vibration absorber of ship propulsion shafting based on magnetorheological elastomer[J]. Journal of Vibration and Shock, 2017, 36(15): 36-42

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