首页> 外文会议>Asia-Pacific Conference on Shock Impact Loads on Structures >NUMERICAL MODEL OF THE DAMPING-SOLVENT EXTRACTION METHOD IN THE TIME DOMAIN AND APPLICATION TO THE SOLUTION OF WAVE SCATTERING PROBLEMS
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NUMERICAL MODEL OF THE DAMPING-SOLVENT EXTRACTION METHOD IN THE TIME DOMAIN AND APPLICATION TO THE SOLUTION OF WAVE SCATTERING PROBLEMS

机译:时域阻尼溶剂提取方法的数值模型及应用于波散射问题的应用

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Based on the damping solvent extraction method (DSEM), A refined sub-regional time domain reciprocal procedure in precise step-by-step integration scheme is proposed to deal with the problems of wave scattering at the cavity surface in unbounded medium with inhomogeneous material or irregular geology, in which the radiation condition of the unbounded domain is automatically satisfied, and the frequency-dependence or convolution integral, as required in other algorithms in time domain, are synchronously avoided. The numerical implementation of the algorithm is given in detail and suitable for the case that the geometric structure of cavity surface is complicated. The wave scattering at the boundary of cylindrical cavity in 2D infinite space with the horizontally incident SV-waves conditions is simulated to validate the proposed method. The numerical results are compared with the solutions obtained by analytical formula and the cloning element method. It is indicated that the new proposed procedure is of good accuracy and feasibility, especially for the middle and low frequency range in seismic analyses. Furthermore, the numerical analysis example also shows that the dispersion effect of infinite media plays an important role in wave scattering by the local geometric surface.
机译:基于阻尼溶剂提取方法(DSEM),提出了精确逐步集成方案的精制亚区域时域互敏过程,以处理腔表面在未均匀材料中的空腔表面的波散射问题不规则地质,其中自动满足未绑定域的辐射条件,并且在时域中的其他算法中,频率依赖性或卷积积分在时域中的其他算法中同步避免。详细给出了算法的数值实现,适用于腔表面的几何结构复杂的情况。模拟了2D无限空间中圆柱形腔边界处的波散射,其模拟了水平入射的SV-波条件以验证所提出的方法。将数值结果与通过分析式和克隆元素方法获得的溶液进行比较。结果表明,新的拟议程序具有良好的准确性和可行性,特别是对于地震分析中的中间和低频范围。此外,数值分析示例还表明,无限介质的色散效果在局部几何表面中在波散射中起重要作用。

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