newmark3.dat

不错的国外的有限元程序代码,附带详细的manual,可以节省很多的底层工作.

file NEWMARK-3.DAT  :  a 3-element, 3-dof, truss bar for Newmark analysis.
solutions are approximately :
.step 1 :   displacements :  0.0101 / 0.0606 / 0.3535   (node1/node2/node3)
	    velocities    :  2 x displ
	    accelerations :  4 x displ
.step 2 :   displacements :  0.0958 / 0.4132 / 1.4138
	    velocities    :  0.1512 / 0.5840 / 1.4134
	    accelerations :  0.2216 / 0.6832 /-0.0012

TimeIntegrationScheme *
1  class Newmark  beta 0.25  gamma 0.5 *

TimeStep 2
1  dt 1. *
2  dt 1. *

Element 3
1  class T2D  mat 1  nodes 1 2 *
2  class T2D  mat 1  nodes 2 3 *
3  class T2D  mat 1  nodes 3 4 *
**

Node 4
1  nDofs 2  coord 2 0. 0.  bcOnDof1 1  bcOnDof2 1  *
2  nDofs 2  coord 2 1. 0.  bcOnDof2 1 *
3  nDofs 2  coord 2 2. 0.  bcOnDof2 1 *
4  nDofs 2  coord 2 3. 0.  bcOnDof2 1  loads 1 2 *
**

Material 1
1  youngMod: E 1.  density: d 1.  area: A 1. *
**

Load 2
1  class BoundaryCondition  loadTimeFunction 1  conditions 3 d 0. v 0. a 0. *
2  class NodalLoad          loadTimeFunction 1  components 2 1. 0. *
**

LoadTimeFunction 1
1  class ConstantFunction  f(t) 1. *
**