CAJ | 학술논문

共固化粘弹性复合材料兼具结构承载和阻尼减振功能。针对传统的混合单元法在应用于粘弹性夹层复合材料结构阻尼性能分析时存在着前处理困难、计算规模大、精度低以及难以考虑正交各向异性铺层自身损耗能力的缺点，推导了一种基于 Layerwise 离散层理论的四节点四边形复合材料层合板单元，并利用直接复特征值解法建立了共固化粘弹性复合材料结构的阻尼性能分析方法。将该方法应用于不同的阻尼结构，分析结果与文献中已公开结果和混合单元法的计算结果进行了对比验证。结果表明，基于离散层理论的层合板单元具有计算精度高、前处理建模简单和计算规模小的优点，可有效应用于复杂共固化粘弹性复合材料结构的阻尼性能分析和设计。
공고화점탄성복합재료겸구결구승재화조니감진공능。침대전통적혼합단원법재응용우점탄성협층복합재료결구조니성능분석시존재착전처리곤난、계산규모대、정도저이급난이고필정교각향이성포층자신손모능력적결점，추도료일충기우 Layerwise 리산층이론적사절점사변형복합재료층합판단원，병이용직접복특정치해법건립료공고화점탄성복합재료결구적조니성능분석방법。장해방법응용우불동적조니결구，분석결과여문헌중이공개결과화혼합단원법적계산결과진행료대비험증。결과표명，기우리산층이론적층합판단원구유계산정도고、전처리건모간단화계산규모소적우점，가유효응용우복잡공고화점탄성복합재료결구적조니성능분석화설계。
The Co-curing of thin viscoelastic damping materials in the composite laminates can improve their structural damping with less loss of stiffness and strength.However,classic numerical simulation of the damped structures by using hybrid finite element method demands a cumbersome computational work,especially for complicated layered structures.A new 4-node quadrangular plate finite element based on the discrete layerwise plate theory was developed for dynamics analysis of composite laminates with co-cured viscoelastic layers.The natural frequencies and modal loss factors of different viscoelastic damped laminated beams,cylindrical shells and stiffened plates were derived.The results show that the proposed model can correctly describe the high shear pattern developed inside thin viscoelastic layers and provide results with less computational work.