In the mathematical model, the nonlinearity of load flow equations is considered and the factor of linearization is combined, so that the accuracy is higher and the adaptability is better.

Seismic response of chimneys to combined horizontal and vertical ground motion is analysed in this paper. The effect of the geometric nonlinearity including vertical ground motion is considered.

It is a compound contact problem of rolling bearings dynamic contact combined of multi-body contact, friction, sliding, material nonlinearity, geometric nonlinearity.