fourier expand meaning in Chinese

傅里叶展开

Thirdly , the method to calculate the 3 - d dynamic responding of layered transversely isotropic saturated soils to an arbitrary buried source in cylindrical coordinate as well as to an arbitrary harmonious source in rectangular coordinate is presented respectively . based on biot ' s wave theory , the 3 - d wave equations in cylindrical coordinate for transversely isotropic saturated poroelastic media are transformed into a group of governing different equations with 1 - order by the fourier expanding with respect to azimuth and hankel integral transform method or by the double fourier transform method with respect to horizontal coordinates in rectangular coordinate . then , transfer matrixes within layered media are derived under the continuous conditions , drainage conditions and the boundary conditions
基于饱和土的biot波动理论，通过fouricr变换，将横观各向同性饱和土三维非轴对称波动方程转化为一组一阶常微分方程组，再经har止el变换，建立问题的状态方程，求解状态方程得到传递矩阵;利用传递矩阵，结合饱和层状地基的边界条件、排水条件及层间接触和连续条件，首次给出层状横观各向同性饱和地基在任意地展力作用下的三维非轴对称动力响应的解析解。