【摘要】 在面波层析成像和传统面波勘探中,都假定地球或浅层探测对象是一个均匀分层的多层介质模型,而实际上,介质的横向不均匀性广泛存在于从地球直到超声尺度的各种范围内。这里采用模式耦合的方法,研究了均匀半空间和二层介质中(也可以是多层的),三维非均匀体对Rayleigh面波的多次散射,计算了频率和时间域中的散射波场,并分析了散射波场的特点,为散射面波的应用提供了初步的理论基础。更多还原

【Abstract】 In surface wave tomography and exploration,it is assumed that the earth and the studied object are a multi-layered media comprised of isotropic layers.Lateral variation,however,exists in the ranges from earth to ultrasonic scales.In this paper,multi-scattering of Rayleigh waves from the three-dimensional structures are investigated using the mode-coupling method.The scattered wave field in frequency and time domain are calculated and analyzed.更多还原