The subsea wellhead is a key equipment for offshore oil and gas development. Traditional research focuses on static stability of system in which the dynamic effect neglected. In this paper, drilling platform/riser/wellhead/conductor fully coupled model established to evaluate system. An algorithm solving proposed based finite element method Newmark integral method. A analysis program also devel...

In order to investigate the behaviour of worm drives, a new dynamic model, composed two blocks, is established and used extract numerical results. The tooth deflection drive, bearings, wheels inertias are taken into consideration. Newmark solving method applied solve motion equations. state contact teeth what enables these signals manifest themselves. Modal analysis developed different natural ...

In this study, aeroelastic response and performance analyses have been conducted for a 5MW-Class composite wind turbine blade model. Advanced coupled numerical method based on computational fluid dynamics (CFD) and computational flexible multi-body dynamics (CFMBD) has been developed in order to investigate aeroelastic responses and performance characteristics of the rotating composite blade. R...

We present and analyze a high-order discontinuous Galerkin method for the space discretization of wave propagation model in thermo-poroelastic media. The proposed scheme supports general polytopal grids. Stability analysis $hp$-version error estimates suitable energy norms are derived semi-discrete problem. fully-discrete is then obtained based on employing an implicit Newmark-$\beta$ time inte...

The hyperbolic wave equation of heat conduction with respect to Christov's formulation is utilized the Streamline- Upwind-Petrov-Galerkin method in space and Θ, Houbolt, linear acceleration, Wilson-Θ Newmark methods time. derivation this its matrix are shown. A 2D transient finite element simulation a generic asperity an infinite line source interface, either as flux density q̇ or temperature di...

Dynamic faulting under slip-dependent friction in a linear elastic domain (in-plane and 3D configurations) is considered. The use of an implicit time-stepping scheme (Newmark method) allows much larger values of the time step than the critical CFL time step, and higher accuracy to handle the non-smoothness of the interface constitutive law (slip weakening friction). The finite element form of t...

This paper presents a finite element formulation for the dynamics analysis of the steady and transient states of a nonlinear piezoelectric beam. A piezoelectric beam with damping is studied under harmonic excitation. A numerical method is used for this analysis. In the paper, the central difference formula of four order is used and compared with the central difference formula of two order in th...