| INVERSE DDA OF A SYSTEM OF BLOCKS IN SPHERE COORDINATES |
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| 作者姓名： | Wu Yun Wang Hui Zhou Shuoyu and Shi Shunying |
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| 作者单位： | Institute of Seismology，CEA，Wuhan 430071，China |
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| 基金项目： | SupportedbyNationalNaturalScienceFoundation(40074024)andtheNational973Project‘TheMechemismandPredictorsofStrongEarthquakeofContinent’(G1998040 73) |
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| 摘 要： | 1 IntroductionDiscontinuousDeformationAnalysis(DDA)developedbyShiin 1 980’s1 ,2 ] maybeusedtocalculatethedeformationanddisplacementsinamulti blocksystemandtoanalyzetherelationbe tweenforcesanddisplacementsinthesystem .Ifthesurveydisplacementofeverypointordirectionisknown,alldisplacementsanddeformationsofblocks,eventheglide ,theclosureandthestretchoftheboundary planeofblocks ,canbecalculated .TheresultisoptimallyfittedaccordingtotheLeastSquarePrinciple.DDAismainlyusedinrockblockssystems…
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INVERSE DDA OF A SYSTEM OF BLOCKS IN SPHERE COORDINATES |
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| Wu Yun,Wang Hui,Zhou Shuoyu and Shi Shunying.INVERSE DDA OF A SYSTEM OF BLOCKS IN SPHERE COORDINATES[J].Journal of Geodesy and Geodynamics,2003,23(Z1). |
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| Authors: | Wu Yun Wang Hui Zhou Shuoyu Shi Shunying |
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| Abstract: | In accordance with the geometric equations of elastic mechanics in the sphere coordinates, the displacement equation of blocks on asphere consisting of 6 deforming parameters is developed. The formula for distance between blocks is derived under the supposition that all block boundaries are prime arcs. The kinematic constraint and the penalty function for reasonable contact between blocks are developed. The normal equations and their coefficient matrix, based on the Least Squares Principle, are derived. The problem of adjudging penetration between blocks is discussed, and a solution is proposed. |
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| Keywords: | Discontinuous Deformation Analysis(DDA) sphere-coordinate current crust movement |
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