76 lines
2.7 KiB
Matlab
76 lines
2.7 KiB
Matlab
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function PostContour(Nodes,Elements,U,Component_val)
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NodeNum = size(Nodes,1) ; % 节点个数
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ElementNum = size(Elements,1) ; %单元个数
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ElementNodeNum=4; %每个单元节点数
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% 矩阵初始化，X Y Z点的坐标：value点的值,对每个单元按照节点序号依次绘制云图
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X = zeros(ElementNodeNum,ElementNum) ;%4*单元个数；各单元各节点的横坐标
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Y = zeros(ElementNodeNum,ElementNum) ;
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Z = zeros(ElementNodeNum,ElementNum) ;
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value = zeros(ElementNodeNum,ElementNum) ;
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%判断矩阵类型（位移，应力，应变）
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if size(Component_val,1)>1%位移
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for i=1:ElementNum
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nd=Elements(i,:);
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value(:,i) = Component_val(nd) ;
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end
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else %应力应变
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%先进行磨平（avg 积分点插值到节点处再取平均）
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Difference=max(Component_val)-min(Component_val);%全域上的最大值-最小值
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AVG=0.75; % 默认阈值75%
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for i=1:1:NodeNum %遍历节点，进行应力磨平
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TElements=Elements';%转置Elements
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itemp=(TElements==i);%进行逻辑判断，itemp:元素为0 1的矩阵
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Cut=max(Component_val(1,itemp))-min(Component_val(1,itemp));%该节点的应力（应变）差
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if 0<Cut&&Cut<=AVG*Difference(1)%判断是否满足阈值条件
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Component_val(1,itemp)=mean(Component_val(1,itemp));%进行应力（应变）磨平
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end
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end
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value=reshape(Component_val,ElementNodeNum,ElementNum);%将Component的值赋给value
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end
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% 绘制变形后云图
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newNodes=Nodes';
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newNodes=newNodes(:);
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DeformationCoefficient=5.0e2; %变形放大系数
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newNodes=newNodes+DeformationCoefficient*U;
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newNodes=reshape(newNodes,[3,size(Nodes,1)]);
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newNodes=newNodes';
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% 定义单元每个面的节点顺序(顺时针或逆时针)
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if ElementNodeNum == 4 % C3D4单元
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fm = [1 2 4;2 3 4;3 1 4;1 3 2];
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elseif ElementNodeNum==6 %C3D6单元
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fm=[1 2 3 1;4 5 6 4;1 2 5 4;1 3 6 4;2 3 6 5];
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elseif ElementNodeNum == 8 % C3D8单元
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fm = [1 2 6 5; 2 3 7 6; 3 4 8 7; 4 1 5 8; 1 2 3 4; 5 6 7 8];
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elseif ElementNodeNum == 20 % C3D20单元
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fm = [1,9,2,10,3,11,4,12;5,13,6,14,7,15,8,16;1,9,2,18,6,13,5,17;
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2,10,3,19,7,14,6,18;3,11,4,20,8,15,7,19;1,17,5,16,8,20,4,12];
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end
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xyz = cell(1,ElementNum) ;
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profile = xyz ;
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%将节点位置赋予其对应值
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for e=1:ElementNum %循环获取每个单元内节点的坐标
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nd=Elements(e,:);
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X = newNodes(nd,1) ;
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Y = newNodes(nd,2) ;
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Z = newNodes(nd,3) ;
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xyz{e} = [X Y Z] ;
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profile{e} = value(:,e);
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end
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% 采用patch函数进行绘图
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figure
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cellfun(@patch,repmat({'Vertices'},1,ElementNum),xyz,.......%用多边形面片的方式显示各个面
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repmat({'Faces'},1,ElementNum),repmat({fm},1,ElementNum),......
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repmat({'FaceVertexCdata'},1,ElementNum),profile,......
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repmat({'FaceColor'},1,ElementNum),repmat({'interp'},1,ElementNum));
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view(3);
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rotate3d on;
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axis off; %不显示坐标轴
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colormap(jet);
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caxis([min(Component_val),max(Component_val)]);
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t1=caxis;
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t1=linspace(t1(1),t1(2),13);
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colorbar('ytick',t1,'Location','westoutside');
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axis equal;
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end |