CAJ | 학술논문

能量有限元方法（EFEA）是一种预示结构高频响应的新方法。为了利用能量有限元方法准确的预示附加阻尼结构的高频响应，将复刚度法与能量有限元的相关理论相结合，同时对现有的能量有限元推导思路进行了大结构阻尼条件下的修正，推导了大阻尼工况下，附加自由阻尼梁结构高频振动响应的能量密度控制方程。同时，通过对阻尼处理交界面处能量转移关系的分析，建立了经过局部附加阻尼处理的梁结构高频响应的能量有限元模型。通过与各自工况下模态解析解的对比，所建立的能量有限元方法模型可以准确的预示大结构阻尼工况下附加阻尼梁的高频响应。
능량유한원방법（EFEA）시일충예시결구고빈향응적신방법。위료이용능량유한원방법준학적예시부가조니결구적고빈향응，장복강도법여능량유한원적상관이론상결합，동시대현유적능량유한원추도사로진행료대결구조니조건하적수정，추도료대조니공황하，부가자유조니량결구고빈진동향응적능량밀도공제방정。동시，통과대조니처리교계면처능량전이관계적분석，건립료경과국부부가조니처리적량결구고빈향응적능량유한원모형。통과여각자공황하모태해석해적대비，소건립적능량유한원방법모형가이준학적예시대결구조니공황하부가조니량적고빈향응。
Energy Finite Element Analysis (EFEA)is a method developed for high-frequency structural response prediction in recent years.To study high-frequency vibration responses of beam structures with free-layer damping (FLD) treatment,the governing equation of energy density for bending vibration of beam structures with FLD treatment under large damping condition was derived based on the model of equivalent complex flexural stiffness and the theory of EFEA with special treatments and modifications for high structural damping.Meanwhile,the EFEA model of beam structures with partial FLD treatment was also built by studying the energy transfer relationship at the interface of damping treatment. Numerical simulations verified the proposed model through comparing with the analytical modal solutions.The results showed that the proposed EFEA model can predict the high-frequency vibration responses of beam structures with FLD treatment under high damping condition accurately.