Abstract In this study, the coupled torsional–transverse vibration of a propeller shaft system owing to misalignment caused by rotation was investigated. The proposed numerical model is based on modified version Jeffcott rotor model. equation motion describing harmonic vibrations obtained using Euler–Lagrange equations for associated energy functional . Experiments considering different speeds ...

The article presents analysis of the advantages and disadvantages in assembling spring dampers torsional vibrations modern marine diesel engines. There are considered urgent problems using propulsion systems: lack systematized scientific data about damper design, statistics their prevalence engines, breakdowns. It has been stated that today there is no methodology for assessing technical condit...

This article reports the striking interplay between the molecular structure and the photodissociation dynamics of catechol (a key dihydroxybenzene), identified using a combination of electronic spectroscopy, hydrogen (Rydberg) atom photofragment translational spectroscopy, density functional theory and second order approximate coupled cluster methods. We describe how the non-planar (C(1) symmet...

Unstable guide vane torsional mode self-excited vibrations that occur at small openings during the transient operations with pump flow, such as starting and closing of mode, are considered to have potentially severe consequences, slippage or damage link lever mechanism. Related site tests indicated end wall clearance a may important influences on vibrations. In this paper, numerical investigati...

Abstract In this article, we present a dynamic model for generic drill-string. The is developed with the intention component-based simulation coupling to external subsystems. performance of drill-string vital in terms efficient wellbore excavation increased hydrocarbon extraction. Drill-string vibrations limit rotary drilling; phenomenon well known and still subject interest academia industry. ...