Hybrid method for the computation of dynamic soil-structure ...
Hybrid method for the computation of dynamic soil-structure ...
Hybrid method for the computation of dynamic soil-structure ...
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FE-BE coupling<strong>Hybrid</strong> domain <strong>method</strong>Introduction<strong>Hybrid</strong> <strong>method</strong>ANSYSMATLABMISSTime Domain BEMFE-BE• FE model• Substructuring• FE equation• Implementation1. PREPROCESSING■ The <strong>structure</strong> is modelledwith finite elements■ The mesh and mode shapes<strong>of</strong> <strong>the</strong> <strong>soil</strong>-<strong>structure</strong> interfaceΣ bs are exported to MatlabPass mesh and mode shapes <strong>of</strong><strong>the</strong> <strong>soil</strong>-<strong>structure</strong> interface toMISS2. DYNAMIC SOIL-STRUCTURE INTERACTION■ Soil impedance■ Modal loads• Response• Verification4. CHANGE STIFFNESS MATRIX3. HYBRID DOMAIN METHODConclusions■ The instantaneous <strong>soil</strong> stiffness isadded to <strong>the</strong> structural stiffnessmatrix.5. SOLUTION■ Calculation <strong>of</strong> influence matricesusing a generalised Filonintegration■ Calculation <strong>of</strong> instantaneous <strong>soil</strong>stiffness■ The structural response iscalculated with a direct timeintegration procedure.■ The <strong>dynamic</strong> <strong>soil</strong>-<strong>structure</strong>interaction <strong>for</strong>ces are updated inevery time step.6. POSTPROCESSINGLMSSMat <strong>Hybrid</strong> <strong>method</strong> <strong>for</strong> <strong>the</strong> <strong>computation</strong> <strong>of</strong> <strong>dynamic</strong> <strong>soil</strong>-<strong>structure</strong> interaction in <strong>the</strong> time domain - p. 38/44
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