Gear tooth spalling is one of the inevitable fault modes in long-term service traction transmission system railway vehicles, which can worsen dynamic load rotating mechanical and reduce operating quality. Therefore, it necessary to study its mechanism guide diagnosis scientifically. This paper established a planar vehicle model with an analytical time-varying meshing stiffness (TVMS) spur gear....

The rolling process of precision profile used for piston ring is simulated by large general-purpose explicit dynamic finite element analysis software ANSYS/LS_DYNA. The modeling of finite element models, the selection of material models and element types, the meshing of the model are introduced in detail. The rolling metal flow rulers of each pass are gained. The deformation of rolled piece and...

We present results of thorough benchmarking of an arbitrary high-order derivative discontinuous Galerkin (ADER-DG) method on unstructured meshes for advanced earthquake dynamic rupture problems. We verify the method by comparison to well-established numerical methods in a series of verification exercises, including dipping and branching fault geometries, heterogeneous initial conditions, bimate...

The M C Squared European FP7 project was about supporting social creativity in the design of resources ambitioning a new genre of mediation in mathematics education. The resources were e-books meshing narrative with dynamic and constructionist digital artefacts. The project generated four socio-technical environments, each involving a Community of Interest producing 64 very diverse c-books. Emb...

We describe a domain decomposition (DD) algorithm for use in the parallel adaptive meshing paradigm of Bank and Holst [3, 4]. Our algorithm has low communication, makes extensive use of existing sequential solvers, and exploits in several important ways data generated as part of the adaptive meshing paradigm. Numerical examples illustrate the effectiveness of the procedure.

Abstract CFD is a numerical approach used to solve fluid problems. In the simulation process, meshing stage crucial produce high accuracy. Meshing process where geometric space of an object broken down into many nodes translate physical components that occur while representing object’s shape. The research objective was analyze characteristics mesh technique in Finite Volume Method (FVM) using R...

In this study, static and dynamic analyses of a spur gear pair with linear tip relief longitudinal crowning were performed. Dynamic experiments conducted to compare verify the analysis results. On basis theory gearing, mathematical model modified was established. addition, finite element mesh generation program developed according model. Finite applied calculate contact stress, patterns, stiffn...

In order to facilitate lubrication and avoid the gear stuck due thermal expansion, there needs be a gap between tooth profiles. As strong nonlinear factor, backlash will affect motion state of planetary system. When failures occur, system accordingly change. this study, meshing stiffness pair with tip chipping fault is calculated by combining analytic geometry method potential energy method. Th...