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BRIEF EXPOSURE TO MATRIX ANALYSIS
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analysis approximate assemblage assumed BAND MATRIX beam BEGIN body force boundary conditions calculated coefficients conduction matrix constant continuum convection coordinate system DATA defined derived determined differential equation direction displacement function displacement vector distributed loading elastic modulus elasticity ELEMENT NODE ELEMENT NUMBER element stiffness matrix energy potential entries equivalent nodal forces essential boundary Example FILE finite element method FOLLOWING FORMAT four-node quadrilateral Galerkin method global coordinates GLOBAL NODE NUMBERS global numbers global stiffness matrix GOSUB GOTO heat flow integration interpolation formula linear matrix equation mesh natural coordinates nodal displacements nodal load obtain PEEK plane plot POKE potential energy PRINT PRINT PRINT problem procedure quadrilateral region REM REM REM Section shear shear stress shown in Figure side solve strain energy stress traction SUBROUTINE Substituting three-node triangle trial function values variable variation WRITELN WRITELN(DEV XG(I YG(I yields zero