I am performing the earthquake analysis on bridge structure in ABAQUS CAE under Dynamic Implicit step. I am getting the error as shown in the picture attached.
Please see the attached picture of error.
All elements are C3D8R.
How to resolve this error?
It seems that force convergence is not happened. You have to check the model , whether the connections between the parts are proper or not. Need to check whether proper contact / Tie definitions are there or not.
Hi everybody,
Nice question Muhammad Farhan, I am slightly familiar to ABAQUS, but after many tests, in analysis of systems with nonlinear behavior of piece-wise linear type, even when the iterations of nonlinear solution do not converge you may continue the analysis and arrive at sufficiently accurate responses. (This may be also true for other types of nonlinear behaviors.) The reason in brief is the fact that the computed responses are at least under the effects of two independent sources of error; one because of nonlinearity, and the other due to approximate time integration, also see:
(a) Soroushian, A. and Wriggers, P., 2023. Test of an Idea for Improving the Efficiency of Nonlinear Time History Analyses When Implemented in Seismic Analysis According to NZS 1170.5: 2004. In International Conference on Wave Mechanics and Vibrations (pp. 107-114). Springer, Cham.
(b) Soroushian, A., Wriggers, P. and Farjoodi, J., 2015, May. From the notions of nonlinearity tolerances towards a deficiency in commercial Transient Analysis softwares and its solution. In Proceedings of 5th ECCOMAS thematic conference on computational methods in structural dynamics and earthquake engineering (COMPDYN 2015), Corfu, Greece.
(for he first the movie of the presentation is also available in my researchgate, I may not be able to attach now)
OK, with many thanks for your kind attention, have a nice day tomorrow and all future.
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