UniformExcitation Pattern in OPENSEESPY

[kamyarsa]

Hello,

I want to exert a sine wave motion to a soil model in Openseespy. I have written the codes as written below:"

ops.timeSeries('Sine', 50, 0.0, 10.0 , 2, '-factor', cFactor)
ops.pattern('UniformExcitation', 32, 1, '-accel', 50)

But the problem is that all displacements, accelerations, and velocity in the soil nodes are still 0. Could anyone help me find the problem ? I guess I should add another command to my code.

Thank you very much.

[mhscott]

Either there is no mass in your model or you don't have boundary conditions (supports) where the uniform excitation will be applied.