truss.fem

InsightToolkit-1.4.0(有大量的优化算法程序)

% 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

<Node>
	0	% Global object number
	2 -4 3	% Node coordinates
<Node>
	1	% Global object number
	2 0 3	% Node coordinates
<Node>
	2	% Global object number
	2 4 3	% Node coordinates
<Node>
	3	% Global object number
	2 0 0	% Node coordinates

<END>  % End of nodes

<MaterialLinearElasticity>
	0	% Global object number
	E  : 30000	% Young modulus
	A  : 0.02	% Beam crossection area
	I  : 0.004	% Moment of inertia
	nu : 0	% Poisson's ratio
	h : 1	% Plate thickness
	RhoC : 1	% Density times capacity
	END:	% End of material definition
<MaterialLinearElasticity>
	1	% Global object number
	E  : 200000	% Young modulus
	A  : 0.001	% Beam crossection area
	I  : 0	% Moment of inertia
	nu : 0	% Poisson's ratio
	h : 1	% Plate thickness
	RhoC : 1	% Density times capacity
	END:	% End of material definition
<MaterialLinearElasticity>
	2	% Global object number
	E  : 200000	% Young modulus
	A  : 0.003	% Beam crossection area
	I  : 0	% Moment of inertia
	nu : 0	% Poisson's ratio
	h : 1	% Plate thickness
	RhoC : 1	% Density times capacity
	END:	% End of material definition

<END>  % End of materials

<Element2DC1Beam>
	0	% Global object number
	0	% Node #1 ID
	1	% Node #2 ID
	0	% MaterialLinearElasticity ID
<Element2DC1Beam>
	1	% Global object number
	1	% Node #1 ID
	2	% Node #2 ID
	0	% MaterialLinearElasticity ID
<Element2DC0LinearLineStress>
	2	% Global object number
	0	% Node #1 ID
	3	% Node #2 ID
	1	% MaterialLinearElasticity ID
<Element2DC0LinearLineStress>
	3	% Global object number
	1	% Node #1 ID
	3	% Node #2 ID
	2	% MaterialLinearElasticity ID
<Element2DC0LinearLineStress>
	4	% Global object number
	2	% Node #1 ID
	3	% Node #2 ID
	1	% MaterialLinearElasticity 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 are applyed, so that the system is
% fixed and we can solve for displacements. In book the BCs are applied
% in form of MFCs, and are different than these here.
<LoadBC>
	1	% Global object number
	0	% GN of element
	0	% DOF# in element
	1 0	% value of the fixed DOF
<LoadBC>
	2	% Global object number
	0	% GN of element
	1	% DOF# in element
	1 0	% value of the fixed DOF
<LoadBC>
	3	% Global object number
	1	% GN of element
	4	% DOF# in element
	1 0	% value of the fixed DOF

<END>  % End of loads