Through simultaneously considering geometric non-linear and material non-linear,the dynamic responses of single-layer spherical latticed shells subjected to harmonic loads and step loads were researched respectively,and the most unfavorable dynamic loads of the structure were analyzed.

This paper mainly focuses on dynamic response analysis of single-layer spherical shells subjected to harmonic loads, step loads and earthquake excitation, thereafter some important conclusions are drawn, such as those about the most unfavorable loads, the collapse type and the failure mechanism.

The method to study the dynamic stability of frame structure by time-history analysis is discussed in this paper,and an example for a frame under step load is given.

Elastic-plastic dynamic response mechanism of a variablecross-section cantilever beam subjected to step load;

Deformation mechanism and energy dissipation of an elastic-plastic cantilever beam subjected to step loading;

The thermal transient behaviour of the thrust bearing under a step load was studied by use of one-dimensional adiabatic thermal model.

Dynamic stability of single-layer reticulated domes under horizontal sudden loads;