直辐板车轮阻尼脊肋结构减振性能分析  

Analysis of Vibration Reduction Performance for a Straight Web Wheel with Damping Ridges

作　　者：崔越 周信 鲁锦涛 王安斌[1] CUI Yue;ZHOU Xin;LU Jintao;WANG Anbin(School of Urban Rail Transportation,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学城市轨道交通学院,上海201620

出　　处：《噪声与振动控制》2021年第6期184-189,共6页Noise and Vibration Control

摘　　要：车轮上附加阻尼层是一种有效减振降噪措施。建立直辐板车轮有限元模型,在此基础上考虑具有半圆形阻尼脊肋的约束阻尼层,分析横截面面积不同的阻尼脊肋减振效果,为进一步优化阻尼层设计,在阻尼脊肋研究基础上,提出桥式阻尼脊肋结构,并进行减振效果分析。计算结果表明:在直辐板车轮上附加层状约束阻尼能降低车轮在大部分频率处的振动,但会增加2360 Hz处的振动;通过在2360 Hz对应的模态振型最大位移处添加半圆形阻尼脊肋,可以降低车轮对应模态的振动,半径为15.5 mm的半圆形阻尼脊肋减振效果最好,相对于普通约束阻尼层,2360 Hz处减振效果达6.5 dB。在研究基础上提出桥式阻尼脊肋约束阻尼层减振方案,通过增加黏弹性层剪切变形,可达到更好减振效果,尺寸为12 mm×5 mm的矩形截面桥式阻尼脊肋相较于普通约束阻尼层,可分别降低2360 Hz和2620 Hz处振动3.5 dB和6.1 dB。Adding a damping layer to the wheel is an effective measure to reduce vibration and noise.In order to further optimize the design of the damping layer to improve vibration and noise reduction effects,a finite element model of a straight web wheel is built in this paper.By using the constrained damping layer with a semi-circular damping ridge,the influence of the cross-sectional area of the damping ridges on the damping effect is analyzed.On this basis,a bridge-type damping ridge structure is proposed,its damping effect is also analyzed.The simulation results show that adding constrained damping layer to the straight web wheel can reduce the vibration of the wheel in a wide frequency range,but it will increase the vibration components at the frequency of 2360 Hz;by adding a semi-circular damping ridge to the position of the maximum displacement of the mode shape at the frequency of 2360 Hz,the vibration of the corresponding mode of the wheel can be reduced.The semi-circular damping ridge with a radius of 15.5 mm has the best damping effect.Compared with the normal constrained damping layer,it can reduce the 2360 Hz modal vibration by 6.5 dB.The bridge-type damping ridge constrained damping layer has better damping effect by increasing the shear deformation of the viscoelastic layer,the bridge-type damping ridge with a rectangular cross-section of 12 mm×5 mm can reduce the vibration at 2360 Hz and 2620 Hz by 3.5 dB and 6.1 dB respectively.

关 键 词：振动与波 低噪声车轮 有限元仿真 约束阻尼层 阻尼脊肋 

分 类 号：U270.16[机械工程—车辆工程]