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48 lines
1.7 KiB
48 lines
1.7 KiB
%--------------------------
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% @Author: Jingqiao Hu
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% @Date: 2021-05-28 17:13:42
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% @LastEditTime: 2021-12-06 16:53:22
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%--------------------------
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% extract macro-dofs from full-dofs
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function lambda_ma = extract_macro_dofs_from_full(full_lambda, nelx, nely, microx)
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globalx = nelx * microx;
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globaly = nely * microx;
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[~,~, edofMat_full] = forAssemble(globalx, globaly);
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[~,~, edofMat_ma] = forAssemble(nelx, nely);
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lambda_ma = zeros(2*(nelx+1)*(nely+1), 1);
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for i = 1:nelx
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for j = 1:nely
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jj = microx; ii = 1;
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global_edof = full_scale_edof(ii, jj, microx, globaly, edofMat_full, i, j);
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fe1 = full_lambda(global_edof([1,2]));
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jj = microx; ii = microx;
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global_edof = full_scale_edof(ii, jj, microx, globaly, edofMat_full, i, j);
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fe2 = full_lambda(global_edof([3,4]));
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jj = 1; ii = microx;
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global_edof = full_scale_edof(ii, jj, microx, globaly, edofMat_full, i, j);
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fe3 = full_lambda(global_edof([5,6]));
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jj = 1; ii = 1;
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global_edof = full_scale_edof(ii, jj, microx, globaly, edofMat_full, i, j);
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fe4 = full_lambda(global_edof([7,8]));
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fe = [fe1(:); fe2(:); fe3(:); fe4(:)];
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edof_ma = edofMat_ma(j + (i-1)*nely, :);
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lambda_ma(edof_ma) = fe;
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end
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end
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end
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function global_edof = full_scale_edof(ii, jj, microx, globaly, edofMat_full, i, j)
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% which micro element in full domain
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last_col_full = (i - 1) * microx + ii - 1;
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this_col_full = (j - 1) * microx + jj;
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global_ele = last_col_full * globaly + this_col_full;
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global_edof = edofMat_full(global_ele, :);
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end
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