摘要
应用模态叠加法研究了以粘弹性梁为阻尼处理的加筋板的稳态简谐响应。在分析中 ,板和梁均采用每个结点三个自由度的有限元 ,考虑了梁的偏心作用。以结构幅频特性曲线的方式来研究粘弹性梁阻尼处理对结构响应的控制作用 ,分析了阻尼材料杨氏模量实部、损耗因子和粘弹性梁剖面尺寸对结构响应的影响。结果表明 ,粘弹性材料能够有效地控制结构的共振响应。粘弹性梁阻尼处理仅对某些结点和模态起的作用较大 ,将其与其他阻尼敷设形式合理配置 ,相信会起到良好的减振效果。
The steady-state harmonic response of stiffened plate with damping treatment of viscoelastic beamis studied using modal superposition method.In the finite element analysis,the degrees of freedomconˉsidered at each node of plate element with four nodes are the displacement wand the slopesθ x andθ y ,each node of beam element with two nodes also have three degrees of freedom as node of plate element by omitˉting the displacements u and v and the slopeθ z of each node of space beam element considering influence of eccentricity.The influence of damping treatment on the structural response is studied by using the relaˉtional curves of structural response amplitude and load frequency.The influences of material real modulus and loss factor and section of viscoelastic beam are analyzed.The results showthat the viscoelastic material is effective for control of structural resonant response.However,effect of reducing vibration is different for different node and different modal.
出处
《船舶力学》
EI
2003年第3期76-85,共10页
Journal of Ship Mechanics
关键词
模态叠加法
粘弹性梁阻尼处理
加筋板
稳态简谐响应
减振
damping treatment of viscoelastic beam
stiffened plate
harmonic response
vibration control
finite element method
