考虑摩擦接触时简谐波透过微缝隙的传播

研究了简谐波透过微缝隙的传播问题．考虑界面摩擦接触，利用Fourier分析技术和半空间解修正法，将边界非线性波动问题简化为一组代数方程并进行了详细的数值计算．给出了分离区、滑移区和粘着区的分布以及界面应力分布和能量分配；讨论了缝隙宽度、摩擦因数、入射角等因素对波动传输的影响．结果表明:由于界面发生局部接触和滑移使得反射波和透射波中含有高频谐波．缝隙宽度与各阶谐波反射、透射系数的关系可为材料及结构的无损检测提供理论依据．

Propagation of Harmonic Waves Through a Micro Gap With Consideration of Frictional Contact

Propagation of elastic waves through a micro gap between two solids with consideration of frictional contact was investigated.By using the Fourier analysis technique and corrective solution method,the nonlinear boundary problem was reduced to a set of algebraic equations.Numerical results exhibit the locations and extents of separation,slip and stick zones,the interface tractions and the energy partition.The effects of gap width,frictional coefficients and the incident angle on the wave transmission were di...