粘弹性损伤混凝土介质中波的传播  

Wave Propagation in Damaged Viscoelastic Concrete Medium

作　　者：罗松南[1] 程红梅[1] 童桦[1] 

机构地区：[1]湖南大学,长沙410082

出　　处：《应用力学学报》2005年第4期657-660,共4页Chinese Journal of Applied Mechanics

基　　金：湖南省自然科学基金资助项目(03JJY3008);教育部科学技术研究重点资助项目(104137)

摘　　要：混凝土的损伤会引起弹性和粘性性质的改变,利用弹性和粘性的双参数来描述损伤,建立双参数损伤理论。根据不同的损伤程度对混凝土介质进行分区处理,建立基本方程式,考虑连续性条件和边界条件,求解波动方程。比较是否考虑粘性时的波幅和波传播时间与损伤的关系,表明粘性是损伤混凝土介质中波传播所必须要考虑的问题。分析了粘弹性混凝土介质中损伤区域长度、损伤度等对波传播的影响,给出了它们的关系曲线,可为波的反分析提供依据。Damage in concrete medium leads to a variation of elasticity and viscosity. Damage theory with double parameters is presented to describe the damage. The damaged concrete medium is divided into several domains in different degrees, and the governing equations are formulated and solved imposing the continuous conditions and boundary conditions. It is revealed that the viscosity effects on the relationship of the amplitudes and wave propagation time with the damage are necessary to consider in the damaged medium. The effects of local damage size and the damaged degree on the wave propagation are analyzed in the viscoelastic concrete medium, and the corresponding curves are plotted to provide a criterion for the inverse analysis.

关 键 词：粘弹性混凝土 双参数损伤理论 波传播 

分 类 号：O374.4[理学—流体力学]