摘要
利用 Fourier- Bessel级数展开法 ,给出了表面具有覆盖层的圆弧形凹陷地形对入射平面 SV波散射问题的一个解析解 ,并利用该解分析了不同深宽比凹陷地形表面覆盖层刚度和厚度对入射 SV波的影响 .结果表明 ,凹陷地形表面覆盖层的存在 ,即使厚度很薄 ,也会显著增加对入射 SV波的放大作用 ,该放大作用可达到单一凹陷地形的 2 .5倍以上 .覆盖层刚度和厚度的变化对入射平面
An analytical solution of scattering of incident plane SV waves by a circular arc canyon with a covering layer was derived by Fourier Bessel series expansion technique, and the solution was utilized to analyze the effects of the covering layer on incident plane SV waves. It was shown that the covering layer in a canyon, even if it is very thin, amplifies incident plane SV waves tremendously, and the amplification can be two and half times than that for a simple canyon; the stiffness and thickness of the covering layer also have great effects on incident plane SV waves.
出处
《地震学报》
CSCD
北大核心
2001年第6期622-636,共15页
Acta Seismologica Sinica
基金
国家自然科学基金 (598780 3 2 )资助项目
