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相空间波前构造法地震多值射线追踪的改进

Keywords: 波前构造法,射线追踪,波前追踪,多值波前,多值射线,相空间

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Abstract:

?当存在低速异常体或弯曲界面时,地震波前出现的自相缠绕(或地震多值)现象是地震波在介质中传播的自然现象,但在以往的研究中时常被忽略。而这些后续波有可能携带低速区或不规则反射界面的有用信息,可以弥补射线覆盖不足等问题。本文在相空间方法的基础上,对波前构造法进行了改进,其中包括反射界面处理过程中采用连续波前映射法和射线追踪过程中采用检波器精确定位算法等。几种简单模型的数值模拟结果表明,改进后的波前构造法是-种计算地震多值射线路径行之有效的算法。

References

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[10]  清华大学、北京大学《计算数学》编写组.计算方法(上册).北京:科学出版社,1974,215-221
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[15]  王润科,张彦丽.判断点与多边形位置关系的算法综述.甘肃联合大学学报,2006,20(6);32-41wangrunkeandzhangyanli.thesummarizeofal-gorithmforjudgmentofrelationsbetweenpolygonsandpoints.jgansui_ianheunverszty,2006,20(6):32-41

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