| 多次透射公式在衰减波场中的实现 |
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| 引用本文： | 陈少林,廖振鹏.多次透射公式在衰减波场中的实现[J].地震学报,2003,25(3):272-279. |
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| 作者姓名： | 陈少林 廖振鹏 |
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| 作者单位： | 1) 中国上海200030上海交通大学振动、冲击、噪声国家重点实验室
2) 中国哈尔滨150080中国地震局工程力学研究所 |
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| 基金项目： | 地震科学联合基金重点项目 (95 0 7 4 4 2 )资助 |
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| 摘 要： | 在多次透射公式的基础上，引进一衰减系数，用来模拟外行的衰减波，将透射公式推广到考虑衰减波入射时的情形；并对衰减波入射时两种极限情形下(理想稳态和理想暂态情形)的反射系数进行了分析. 结果表明, 多次透射公式对弱衰减波仍可适用，对于强衰减波则需应用加衰减系数的多次透射公式进行透射．最后，通过两相介质两个数值实验, 验证了该边界条件在模拟衰减波时的精度．
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| 关 键 词： | 多次透射公式& 衰减波& 两相介质 |
| 文章编号： | 0253-3782(2003)03-0272-08 |
| 修稿时间： | 2003年3月11日 |
MULTI-TRANSMITTING FORMULA FOR ATTENUATING WAVES |
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| Chen Shaolin Liao Zhenpeng The State Key Laboratory of Vibration,Shock & Noise,SJTU,Shanghai ,China Institute of Engineering Mechanics,China Seismological Bureau,Harbin ,China.MULTI-TRANSMITTING FORMULA FOR ATTENUATING WAVES[J].Acta Seismologica Sinica,2003,25(3):272-279. |
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| Authors: | Chen Shaolin Liao Zhenpeng The State Key Laboratory of Vibration Shock & Noise SJTU Shanghai China Institute of Engineering Mechanics China Seismological Bureau Harbin China |
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| Affiliation: | Chen Shaolin 1) Liao Zhenpeng 2) 1) The State Key Laboratory of Vibration,Shock & Noise,SJTU,Shanghai 200030,China 2) Institute of Engineering Mechanics,China Seismological Bureau,Harbin 150080,China |
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| Abstract: | The MTF is extended to case of attenuating incident wave by introducing an attenuation coefficient. The reflection coefficients of this modified MTF and MTF are evaluated and compared when an attenuating wave impinges on the boundary, and results demonstrate that MTF can be used to absorb slightly attenuating waves and the modified MTF is more capable of absorbing heavily attenuating waves than MTF. The accuracy of modified MTF is also tested by numerical examples of two-phase media. |
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| Keywords: | MTF attenuating wave two-phase media |
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