从震源物理的角度讨论影响地壳应力的某些磁学问题

DISCUSSION ON SOME MAGNETISM QUESTIONS INFLUENCING CRUSTAL STRESS FROM THE SOURCE PHYSICAL POINT OF VIEW

本文从压磁效应的另一个方面——磁化对应力的影响,讨论了震磁问题。利用磁畴理论和磁弹耦合理论,得出了地学尺度下包含磁致伸缩效应的弹性平衡方程。由此分析变化磁场对应力的影响及居里面的力学特殊性。对热应力的磁贡献部份进行了模型估算。结果表明,这个异常应力足以影响地震的发生。根据上述结果,作者结合震源模式讨论了几个地震预报问题。

From another aspect of piezomagnetic effect—magnetization influencing stress, this paper deals with the seismomagnetie questions. Using the theories of magnetic domain and magneto-elastic coupling, obtains the elastic equilibrium equation containing magnetostrictive effect in the dimension of the earth science. From this, analyses the influence of changing magnetic field upon the stress and the mechanical features of the Curie surface. The model estimation is made for the part of magnetic contribution of the thermal stress. This anomalous stress is enough to influence the occurrence of the earthquake. Finally, from the results mentioned above, also discusses the prediction problems of some earthquakes with source model.