CAJ | 학술논문

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.
응용모태첩가법연구료이점탄성량위조니처리적가근판적은태간해향응.재분석중,판화량균채용매개결점삼개자유도적유한원,고필료량적편심작용.이결구폭빈특성곡선적방식래연구점탄성량조니처리대결구향응적공제작용,분석료조니재료양씨모량실부、손모인자화점탄성량부면척촌대결구향응적영향.결과표명,점탄성재료능구유효지공제결구적공진향응.점탄성량조니처리부대모사결점화모태기적작용교대,장기여기타조니부설형식합리배치,상신회기도량호적감진효과.
The steady - state harmonic response of stiffened plate with damping treatment of viscoelasticbeam is studied using modal superposition method. In the finite element analysis, the degrees of freedom con-sidered at each node of plate element with four nodes are the displacement w and the slopes θx and θy, eachnode of beam element with two nodes also have three degrees of freedom as node of plate element by omit-ting the displacements u and v and the slope θz of each node of space beam element considering influenceof eccentricity. The influence of damping treatment on the structural response is studied by using the rela-tional curves of structural response amplitude and load frequency. The influences of material real modulusand loss factor and section of viscoelastic beam are analyzed. The results show that the viscoelastic materialis effective for control of structural resonant response. However, effect of reducing vibration is different fordifferent node and different modal.