CAJ | 학술논문

由于面内波的尺度通常大于面外波的尺度，目前板结构基于有限元的能量流分析忽略面内运动，这种处理方法在一些情况下并不合理。本文根据薄板的经典理论，将面内运动和面外运动进行解耦，然后建立了两种运动的有限元能量流模型，最后通过能量平衡方程获得了板结构弯曲子系统的耦合损耗因子计算格式。算例分析表明，本文方法能较准确计算面内运动能量与面外运动能量，可为后续的耦合损耗因子提供更加准确的计算方法。
유우면내파적척도통상대우면외파적척도，목전판결구기우유한원적능량류분석홀략면내운동，저충처리방법재일사정황하병불합리。본문근거박판적경전이론，장면내운동화면외운동진행해우，연후건립료량충운동적유한원능량류모형，최후통과능량평형방정획득료판결구만곡자계통적우합손모인자계산격식。산례분석표명，본문방법능교준학계산면내운동능량여면외운동능량，가위후속적우합손모인자제공경가준학적계산방법。
As a result of the in-plane waves length are longer than the out-plane waves length in most time, at present the in-plane motions of plate structures are ignored in the energy flow analysis based on finite element,but this approximation is not rational in some particular condition. Based on the traditional theories of lamina, the in-plane and out-plane motions are uncoupled in this paper, then two energy flow models of these two types motion are deduced, and the coupling loss factor of bending waves are given by energy balance equations. The numerical example shows that the method presented by this paper can calculate the in-plane and out-plane energy , then this method can be a more accurate calculation method for the coupling loss factor .