摘要
地球在日、月引潮力作用下，产生周期性引潮力与西向引潮力。周期性引潮力所致构造应力达到１０４Ｐａ左右的量级，属对称循环交变应力，对应于１０５Ｐａ量级的静态构造应力，对地震等构造过程能起显著的触发作用。西向引潮力所致西向剪应力达到１０５Ｐａ左右的量级，属脉动循环交变应力，对应于１０６Ｐａ量级的静态构造应力，对岩石圈、软流圈水平运动有显著的驱动意义，是构造运动基本驱动力之一。
Under the action of tidal force of the Sun and Moon a periodic tidal force and the westward tidal drag occur in the Earth,the former belonging to a symmetric cyclic alternating stress results in the tectonic stress which is the order of magnitude of 10 4 Pa roughly equal to static tectonic stress of 10 5 Pa and plays a prominent role in the triggering of earthquake;the later causes the westward shear stress belonging to pulsating cyclic alternating stress which is the order of magnitude of 10 5Pa roughly equal to static tectonic stress of 10 6 Pa and makes an important contribution to the horizontal movement of lithosphere and asthenosphere and is a fundamental dynamical factor resulting in the tectonic movement.
出处
《地质力学学报》
CSCD
1998年第3期20-27,共8页
Journal of Geomechanics
