Gearbox explosion effects modelling

摘要

This paper is a summary of an investigation into the structural response of a marine gearbox when subjected to an oil mist explosion, using the DYNA3D structural modelling tool. The computer model of the complex gearbox structure was simplified to allow scoping studies aimed at evaluating whether the structure can withstand the loading pressure. The joint strengths in the model were calculated using simple bolt rules converted to critical failure stresses. The simulations demonstrated that a relatively simple approach gives good guidance to the likely structural response. They also give an insight into 'what if' studies whereby trade-offs in the structure can be explored to improve the survivability of the gearbox and hence increase the safety factor. Areas for further development are described.