| 均匀弹性全空间中走滑断层产生的方向性速度脉冲研究 |
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| 引用本文： | 刘启方,金星,袁一凡.均匀弹性全空间中走滑断层产生的方向性速度脉冲研究[J].地震工程与工程振动,2007,27(2):12-19. |
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| 作者姓名： | 刘启方 金星 袁一凡 |
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| 作者单位： | 1. 中国地震局,工程力学研究所,黑龙江,哈尔滨,150080
2. 中国地震局,工程力学研究所,黑龙江,哈尔滨,150080;福建省地震局,福建,福州,350003 |
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| 基金项目： | 地震学联合基金项目（1050200）;中国地震局工程力学研究所预研究项目 |
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| 摘 要： | 本文在均匀弹性全空间中对走滑断层附近方向性速度脉冲作了定性研究。研究表明,方向性速度脉冲主要与观测点和破裂起始点之间的一部分破裂面的破裂过程有关;方向性速度脉冲的周期随震源时间函数中的上升时间增大而增加。破裂速度对于方向性速度脉冲的峰值和周期有重要影响,一般而言,随着破裂速度的增加,方向性速度脉冲的周期减少,峰值增大。因此在统计脉冲的峰值和周期与矩震级的关系时,需要考虑破裂速度的影响。
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| 关 键 词： | 速度脉冲 破裂速度 上升时间 全空间 |
| 文章编号： | 1000-1301（2007）02-0012-08 |
| 修稿时间： | 2006-05-162006-09-24 |
Study on forward-directivity velocity pulse generated by strike slip fault in full space |
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| LIU Qifang,JIN Xing,YUAN Yifan.Study on forward-directivity velocity pulse generated by strike slip fault in full space[J].Earthquake Engineering and Engineering Vibration,2007,27(2):12-19. |
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| Authors: | LIU Qifang JIN Xing YUAN Yifan |
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| Institution: | 1. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China; 2. Earthquake Administration of Fujian Province, Fuzhou 350003, China |
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| Abstract: | The forward directivity velocity pulse generated by strike slip fault in full space is studied.The studies show that the pulse is mainly related to the rupture process of the fault plane located between the initial rupture point and the observational site.The period of the pulse increases as the rise time increases,and the rupture velocity has great influence on the velocity pulse.Generally,the pulse period decreases and the pulse amplitude increases as the rupture velocity increases for shallow crustal earthquakes.So the rupture velocity should not be ignored when constructing the relation between the pulse period and the moment magnitude. |
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| Keywords: | velocity pulse rupture velocity rise time full space |
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