摘要
为进一步提高管状阻尼结构减振效果,本文对过渡层分别进行了均匀周向、轴向带槽处理,基于复特征值法建立结构动力学方程,研究管状结构结构参数(开槽段数、间隔、厚度和约束层厚度)的改变对约束阻尼管振动特性的影响。建立了全敷设和均匀周向、轴向带槽过渡层约束阻尼管状结构有限元模型,分析比较模态固有频率和结构损耗因子,同时通过解析解(摄动法)和仿真计算结果验证所建模型的合理性,经分析对比结果数据吻合良好。通过对全敷设与带槽结构的谐响应分析结果表明,均匀带槽过渡层能够局部放大粘弹性阻尼层內剪切变形,提升结构阻尼效果,且周向带槽过渡层结构优于轴向带槽结构。
In order to further improve the effect of tubular damping structure,the stand-off layer is treated with uniform circumferential and axial grooves respectively. The dynamic equation of structure is established based on the complex eigenvalue method,the effects of structural parameters( number of grooves,interval,thickness and thickness of constraint layer) on vibration characteristics of restrained damped tube are studied. The finite element model of fully laid and uniformly circumferential and axially fluted stand-off layer restrained damping tubular structure is established. Analysis and comparison of modal natural frequency and structural loss factor,at the same time,the rationality of the model is verified by analytical solution( perturbation method) and simulation results,the results of analysis and comparison showed good agreement. Through the analysis of the harmonic response of the fully laid and slotted structure,the shear deformation within the viscoelastic damping layer can be partially amplified by the uniform slotted stand-off layer,lift the damping effect of the structure,and the slotted stand-off layer structure of circumferential is better than that of axial.
作者
燕碧娟
徐鹏
赵章达
YAN Bi-juan;XU Peng;ZHAO Zhang-da(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《太原科技大学学报》
2020年第1期14-19,25,共7页
Journal of Taiyuan University of Science and Technology
基金
国家自然科学基金(51405323)
山西省研究生教育创新项目(2019SY480)
关键词
管状结构
带槽过渡层
约束阻尼
振动特性
tubular structure
slotted stand-off layer
constraint damping
vibration character
