Hi:

I just found that the convergence ability of Seismostruct 2018 is much worse than Seismostruct 2016.

The probelm is this, I made a static dynamic model in Seismostruct 2016, and the model was successfully calculated in all 41 seconds. However, when I use Seismostruct 2018 to run this model without any change, the calculation is terminated in the 28th second, then I have to increse the steps of the model. In seismostruct 2016, 41-seconds model have 820 steps and the calculation was successfully done, but, in seismostruct 2018, 41- seconds model have 8200 steps and the calculation still terminated at 38th second!

What is wrong with the newest Seismostruct 2018?

B.T.W I have sent the model file to support@seismosoft.com, I'm looking forward for the help.

Regards

Wang Guojue