【摘要】 运用动态有限元方法 ,对地壳块体脉冲响应的时间反转过程进行了仿真研究 .结果表明 ,分布在较长时段上的量值较小的变化载荷 ,在一定的构造条件或边界条件下有可能累积成一个时间短、量值高的脉冲 .这一过程在物理上表现为先头发出的波与后继发出的波发生了多次叠加或干涉 .在这个认识基础上 ,对孕震以及发震的机理提出了新的看法 ,并就华北块体对渤海、黄海潮汐动态响应的仿真结果 ,进一步作出理论上的解释 .更多还原

【Abstract】 In this paper, the time reversal processes of impulse response of crust are simulated by means of a dynamical finite element method (DFEM). The results indicate that a small undulating load during a long period may cause a focused brevity impact in a chaos response system. The physical principle for this phenomenon is that the wave interferes or multiples superposition. Based on this knowledge, a new view toward the mechanism for preparing and triggering an earthquake is proposed. Finally, an interpretation of crust response to the sea tides is given.更多还原