Abstract: This paper presents a study of the parametrically excited behavior of passenger and freight vehicles on tangent track due to harmonic variations in conicity using linear models. The effect of ...

Abstract: The dynamic response of rail vehicles is affected by parameters such as wheel-rail geometry, track gage, and axle load. Variations in these parameters, as a rail vehicle moves down the track, ...

Abstract: A kinematic theory for lower‐regime bedform shape is presented and examined in the light of extensive bedform data observed in large prototype channels. Depending upon the extent of bedform maturity, the theory predicts ...

Abstract: In connection with the mechanics of ripples and dunes, the governing equations of convection‐diffusion of suspended sediment in two‐dimensional flow fields over ripples or dunes are solved by the finite‐element method. The ...

Abstract: The mechanics of the limiting‐equilibrium profiles of ripples and dunes are presented. The analysis is based on low sediment transport rates, in which the sediment essentially moves as bedload. The sediment transport rate ...

Abstract: The form friction factors for an idealized series of two‐dimensional bedforms simulating a train of ripples or dunes in alluvial channels are obtained analytically by integrating the pressure along the bedform profiles. ...

Abstract: It is conjectured that the low‐frequency turbulence in alluvial channels is engendered at the separation points of the large eddies in the lee of bedforms. These points are taken as the locations of point sources of pressure ...

Abstract: Solid cylinder upsetting is analyzed using three different approaches for frictional boundary condition modeling. These are (1) constant shear friction factor, (2) experimentally measured frictional ...