Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufm.p42b..02x&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #P42B-02
Physics
0545 Modeling (4255), 1239 Earth Rotation Variations, 1645 Solid Earth (1225), 5770 Tidal Forces, 7223 Earthquake Interaction, Forecasting, And Prediction (1217, 1242)
Scientific paper
Tidal deformation of the Earth is normally calcaluted using the analytical solution with some simplified assumptions, such as the Earth is a perfect sphere of continuum media. This paper proposes an alternative way, in which the Earth crust is discontinuous along its boundaries, to calcualte the tidal deformation using a finite element method. An in-house finite element code is firstly introduced in brief and then extended here to calcualte the tidal deformation. The tidal deformation of the Earth due to the Moon was calculated for an geophysical Earth-model with the non-continuum outlayer layer and comapared with the continuum case. The preliminary results indicate that the discontinuity could have different effects on the tidal deformation in the local zone around the fault, but almost no effects on both the locations far from the fault and the global deformation amplitude of the Earth. The localised deformation amplitude seems to depend much on the relative orentiation between the fault strike direction and the loading direction (i.e. the location of the Moon) and the physical property of the fault. The rotation due the unsymmetric geometric shape of the earth has also been investigated.
Xing H. L.
Yin Chuancun
Zhang James J.
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