truss_noload.fem

来自「InsightToolkit-1.4.0(有大量的优化算法程序)」· FEM 代码 · 共 116 行

% Simple truss example from the chapter 25.3
% this chapter can be downloaded from http://titan.colorado.edu/courses.d/IFEM.d/IFEM.Ch25.d/IFEM.Ch25.pdf

% All loads removed - as an experiment...

<NodeXYrotZ>
	0	% Global object number
	-4	% X
	3	% Y
<NodeXYrotZ>
	1	% Global object number
	0	% X
	3	% Y
<NodeXYrotZ>
	2	% Global object number
	4	% X
	3	% Y
<NodeXY>
	3	% Global object number
	0	% X
	0	% Y

<END>	% End of nodes

<MaterialStandard>
	0	% Global object number
	E  : 30000	% Young modulus
	A  : 0.02	% Crossection area
	I  : 0.004	% Moment of inertia
	nu : 0	% Poisson's ratio
	END:	% End of material definition
<MaterialStandard>
	1	% Global object number
	E  : 200000	% Young modulus
	A  : 0.001	% Crossection area
	I  : 0	% Moment of inertia
	nu : 0	% Poisson's ratio
	END:	% End of material definition
<MaterialStandard>
	2	% Global object number
	E  : 200000	% Young modulus
	A  : 0.003	% Crossection area
	I  : 0	% Moment of inertia
	nu : 0	% Poisson's ratio
	END:	% End of material definition

<END>	% End of materials

<Beam2D>
	0	% Global object number
	0	% MaterialStandard ID
	0	% NodeXYrotZ 1 ID
	1	% NodeXYrotZ 2 ID
<Beam2D>
	1	% Global object number
	0	% MaterialStandard ID
	1	% NodeXYrotZ 1 ID
	2	% NodeXYrotZ 2 ID
<Bar2D>
	2	% Global object number
	1	% MaterialStandard ID
	0	% NodeXY 1 ID
	3	% NodeXY 2 ID
<Bar2D>
	3	% Global object number
	2	% MaterialStandard ID
	1	% NodeXY 1 ID
	3	% NodeXY 2 ID
<Bar2D>
	4	% Global object number
	1	% MaterialStandard ID
	2	% NodeXY 1 ID
	3	% NodeXY 2 ID

<END>	% End of elements

% We apply only one nodal force. This is not the in book.
%<LoadNode>
%	0	% Global object number
%	2	% GN of element on which the load acts
%	1   % Point number within the element
%	2 20 -20	% Force vector (first number is the size of a vector)
%
% Essential boundary conditions in form of MFCs are applyed, so that the system is
% fixed and we can solve for displacements. In book the MFCs are different than these here.
%<LoadBCMFC>
%	1	% Global object number
%	1	% Number of DOFs in this MFC
%	  %==>
%	  0	% GN of element
%	  0	% DOF# in element
%	  1	% weight
%	  %==>
%	1 0	% rhs of MFC
%<LoadBCMFC>
%	2	% Global object number
%	1	% Number of DOFs in this MFC
%	  %==>
%	  0	% GN of element
%	  1	% DOF# in element
%	  1	% weight
%	  %==>
%	1 0	% rhs of MFC
%<LoadBCMFC>
%	3	% Global object number
%	1	% Number of DOFs in this MFC
%	  %==>
%	  1	% GN of element
%	  4	% DOF# in element
%	  1	% weight
%	  %==>
%	1 0	% rhs of MFC

<END>	% End of loads