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一个外国朋友的问题
In ABAQUS, we have a spring element SPRINGA. This is a nonlinear spring element. So we can give the stiffness of the spring as many x, y(x) values to define the nonlinear curve.
Suppose these values for a SPRINGA element are given in an INP file as follows
x1, y1
x2, y2
x3, y3
Then using ABAQUS Standard I start a static analysis. For a static analysis these values I need not change right from beginning to end of the analysis time of the ABAQUS. But for a dynamic analysis I need to change these x, y(x) values at every time step of the dynamic force applied at the nodes of the spring. But once I give the input file to ABAQUS command, I can not change the values of x, y(x) in the input file during the analysis time of ABAQUS.
But I have to give a set of x, y(x) values
for every time step of the time dependent forcing function because
spring stiffness will get changed for the application of dynamic load in a field of practical case. |