GEOMETRIC AND PHYSICAL MEANING OF TIDAL TILT AND IT’S SHEAR STRAIN PROPERTY
Liu Xuyan ;and Hong Xing
Earthquake Administration of Fujian Province, Fuzhou 350003
Abstract The geometric meaning of mathematical expression which describes a line segment on ground surface before and after crustal deformation is analyzed, it is pointed out that translation, rotation and strain are three elements of combinational crustal deformation. For distinguishing the tidal tilt belong to which one of three elements, the geometric and physical meaning of tidal tilt are analyzed.On the basis of the analysis the observations of tilt earth tide on the eastewestern and northsouthern directions which can determine the amount and the direction of the generating tide force and the analysis on each component of tidal strain tensor,it is found that there is mathematical relation between components of tidal tilt and shear strains related to radius of earth and thus tidal tilt possesses shear property.
Key words ：
shear strain
tilt on ground surface
tidal tilt
horizontal component of the generating tide force
geometric and physical meaning
Received: 01 January 1900
Corresponding Authors:
Lu Xuyan
Cite this article:
Liu Xuyan ,and Hong Xing. GEOMETRIC AND PHYSICAL MEANING OF TIDAL TILT AND IT’S SHEAR STRAIN PROPERTY[J]. , 2007, 27(4): 82-86.
Liu Xuyan ,and Hong Xing. GEOMETRIC AND PHYSICAL MEANING OF TIDAL TILT AND IT’S SHEAR STRAIN PROPERTY[J]. jgg, 2007, 27(4): 82-86.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2007/V27/I4/82
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