test3.m

matlab中PDE工具箱的帮助文件pde.pdf的例子全部用代码实现,花了我一个月的时间,有限元应用程序

function pdemodel
[pde_fig,ax]=pdeinit;
pdetool('appl_cb',1);
set(ax,'DataAspectRatio',[1 1 1]);
set(ax,'PlotBoxAspectRatio',[1.5 1 1]);
set(ax,'XLim',[-1.5 1.5]);
set(ax,'YLim',[-1 1]);
set(ax,'XTick',[ -1.5,...
 -1.3,...
 -1.1000000000000001,...
 -0.89999999999999991,...
 -0.69999999999999996,...
 -0.5,...
 -0.29999999999999982,...
 -0.099999999999999867,...
 0.099999999999999867,...
 0.29999999999999982,...
 0.5,...
 0.69999999999999996,...
 0.89999999999999991,...
 1.1000000000000001,...
 1.3,...
 1.5,...
]);
set(ax,'YTickMode','auto');
pdetool('gridon','on');

% Geometry description:
pderect([-0.2980456026058631 0.69869706840390888 0.39902280130293177 -0.39902280130293155],'R1');
pdecirc(0.21172638436482105,-0.0097719869706838214,0.12214983713355065,'C1');
set(findobj(get(pde_fig,'Children'),'Tag','PDEEval'),'String','R1-C1')

% Boundary conditions:
pdetool('changemode',0)
pdesetbd(8,...
'dir',...
1,...
'1',...
'8')
pdesetbd(7,...
'dir',...
1,...
'1',...
'8')
pdesetbd(6,...
'dir',...
1,...
'1',...
'8')
pdesetbd(5,...
'dir',...
1,...
'1',...
'8')
pdesetbd(4,...
'dir',...
1,...
'1',...
'sin(x)')
pdesetbd(3,...
'dir',...
1,...
'1',...
'10')
pdesetbd(2,...
'dir',...
1,...
'1',...
'sin(x)')
pdesetbd(1,...
'dir',...
1,...
'1',...
'5')

% Mesh generation:
setuprop(pde_fig,'Hgrad',1.3);
setuprop(pde_fig,'refinemethod','regular');
pdetool('initmesh')
pdetool('refine')
pdetool('jiggle')

% PDE coefficients:
pdeseteq(1,...
'1.0',...
'0.0',...
'10.0',...
'1.0',...
'0:10',...
'0.0',...
'0.0',...
'[0 100]')
setuprop(pde_fig,'currparam',...
['1.0 ';...
'0.0 ';...
'10.0';...
'1.0 '])

% Solve parameters:
setuprop(pde_fig,'solveparam',...
str2mat('0','1632','10','pdeadworst',...
'0.5','longest','0','1E-4','','fixed','Inf'))

% Plotflags and user data strings:
setuprop(pde_fig,'plotflags',[1 1 1 1 1 1 1 1 0 0 0 1 1 0 0 0 0 1]);
setuprop(pde_fig,'colstring','');
setuprop(pde_fig,'arrowstring','');
setuprop(pde_fig,'deformstring','');
setuprop(pde_fig,'heightstring','');