Propagation properties of the nonlinear torsional wave in a non-circular cross-sectional rod are investigated in this paper.

Calculation of crankshaft torsional vibration response in diesel engine by torsional elastic wave theory;

Starting with properties of cubic parabola, it is demonstrated elementarily that solving elliptic equations using Jacobian elliptic functions, analytic solutions for a class of nonlinear wave equations and properties of nonlinear waves can be obtained, especially for solitary waves.

In this study, numerical analyses for solving the generalized Biot s dynamic consolidation equations by virtue of finite element method are performed on dynamic response of sandy seabed subjected to non-linear wave loading in the shallow water region.

Based on the generalized formulation of two-dimensional Biot s theory, a finite element numerical method in time domain is developed to evaluate the dynamic response of saturated elastic seabed subject to linear or non-linear wave loadings.

At present, the calculations of wave forces on marine structures are confined to the linear and low-order non-linear wave theories, sometimes these are not satisfied with the requirements.