In this paper,several classes of integrable nonlinear higher-order ordinary differentialequations are given.It is pointed out that some known results of integra
This paper presents the energy integral in generalized classical mechanics.Theintegral enables us to reduce a given canonical system with2n order to another sys
In this paper an accurate solution for the thick rectangular plate with free edges laid onelastic foundation is presented.The superposition method of trigonomet
A kinematically admissible velocity field which is different from Avitzur’s isestablished in Cartesian Coordinates.An upper-bound analytical solution to strip
Turbulent motion could be regarded as the superposition of fluctuations with differentscales.It’s of great theoretical and practical importance to determine th
The dynamic interaction problems of three-dimensional linear elastic structures witharbitrary shaped section embedded in a homogeneous,isotropic and linear elas