摘要
采用严谨的数学物理推导，从理论上阐述了潮汐线应变组合观测的物理力学实质．潮汐线应变的和组合ｅｓ是潮汐面应变与方位角为ａｓ的平面旋转坐标系中潮汐剪切应变分量τｓ的２Ｑｓ倍之和；潮汐线应变的差组合ｅΔ是方位角为αＤ的平面旋转坐标系中潮汐剪切应变分量τＤ的２ＱＤ倍．两正交潮汐线应变和组合的潮汐因子（或勒夫数ｆｎ）可作为潮汐应变观测中直接描述震源区介质扩容程度的物理力学特征量；潮汐线应变差组合的潮汐因子（或勒夫数ｌｎ）．可作为潮汐应变观测中描述震源区介质剪切应变强度的物理力学标度量．本文还给出了潮汐线应变组合观测的调和分析方法、公式及我国主要潮汐应变台站组合观测的调和分析结果．
In this Paper,a Physics-mechanical significance of the tidal strain combination is expounded theoretically by a rigorous inference of mathematics and physics. It shows that the tidal strain sum combination es is the sum of the tidal plane strain and 2Q s times the tidal shear strain componentτs in the plane rotating coordinate with azimuth α,and the tidal stain subtractive combination eΔ is 2QD times the tidalshear strain τD in the plane rotating coordinate with azimuth αD.Specially, the tidal factor of the sum combination consisted of two cross tidal strain (or Love number fn) is a physics-mechanical criterion which is determined an earthquake focus dilatancy, the tidal factor of the subtractive combination (or Love number ln) is a physics-mechanical criterion which is determined shear strain intensity in an earthquake focus zone. In this Paper, we also give the harmonic analysis method and formulae of tidalstrain combination and its harmonic analysis result of mainly tidal strain stations in our country.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1994年第A02期204-212,共9页
Chinese Journal of Geophysics
基金
地震科学联合基金
关键词
潮汐应变
组合观测
物理力学实质
前兆
Tidal strain
Combination
Physics-mechanical significance
Harmonic analysis
Dilatancy
Shear strain.
