用置大数比划零置一好用
看Example文件夹，时程分析结果相近，Abaqus用的HHT算法，Matlab用的Newmark算法
例如：
izc=[25,26,27,52,53,54,79,80,81]; bj = zeros(length(izc)3,1); for i=1:length(izc) bj(i3-2) = izc(i)3-2; bj(i3-1) = izc(i)3-1; bj(i3) = izc(i)*3; end for i1=bj M(i1,:)=0; M(:,i1)=0; K(i1,:)=0; K(:,i1)=0; end for i2=bj % M(i2,i2)=Original.M(i2,i2); % K(i2,i2)=Original.K(i2,i2); M(i2,i2)=Original.M(i2,i2); K(i2,i2)=1e10; end
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