地震控制策略
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摘要
提出了控制地震概念和用时间反转方法实现非均匀地壳中波的聚焦,从而实现动力触发地震的思路。采用了有限元动力学仿真技术,研究了在波的遍历模型、线性不均匀的介质、以至非线性介质中的时间反转,探讨了在潜在震源区域人工聚能的可能性。结果表明这种聚能是可行的,在考虑介质非线性的条件下,波能量至少可以近似地聚焦。
A new concept of earthquake occurrence control,and a consideration of using the time reversal method to realize the focusing wave energy in earth crust and triggering earthquake dynamically,are proposed.In the method the technology of ND-FEM emulation is adapted to study the time reversal of wave in un-even,and further more non-linear crustal media,verify the feasibility that focus seismic wave energy on to the potential epicentre.The result shows that it is feasible to focus the wave energy through crust ,at least an approximate focus through non-linear crustal media.
A new concept of earthquake occurrence control,and a consideration of using the time reversal method to realize the focusing wave energy in earth crust and triggering earthquake dynamically,are proposed.In the method the technology of ND-FEM emulation is adapted to study the time reversal of wave in un-even,and further more non-linear crustal media,verify the feasibility that focus seismic wave energy on to the potential epicentre.The result shows that it is feasible to focus the wave energy through crust ,at least an approximate focus through non-linear crustal media.
引文
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[2]陈湘鹏,王乘,郑文衡.含内边界非均匀材料三维FEM模型的时间逆转仿真研究[J].地壳形变与地震,2001,21(2):7-16.
[3]MathiasFink.TimeReversalVioceEffect[J].ScientificAmerican,1999,281(5):91-97.
[4]FinkM.Time-reversedAcoustics[J].PhysicsToday,1997,50(3):34-40.78
[5]GiovanniGallavotti.Breakdownandregenerationoftimereversalsymmetryinnonequilibriumstatisticalmechanics[J].PhysicaD,1998,112:250-257.
[6]何振,王乘,牛安福,等.地壳块体应力场动力学演变过程仿真的初步研究[J].地壳形变与地震,2000,20(1):1-7.
[7]IngRK,FinkM.Self-focusingandtimerecompressofLambwavesusingatimereversalmirror[J].Ultrasonics,1998,179-186.
[8]王仁,黄杰藩.华北地区近700年地震序列的数学模拟[J].中国科学(B),1982, (4):745-753.
[9]王仁,何国琦,殷有泉,等.华北地区地震迁移的数学模拟[J].地震学报,1980,2(1):32-42.
[10]汪素云,陈培善.中国及邻区现代构造应力场的数值模拟[J].地球物理学报,1980,23(1):35-45.
[11]尹京苑,等.地壳应力状态及其在三维有限元模拟计算中的意义[J].地震,1998,7(3):226-232.
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