Reduced Order Modeling for Rapid Simulations of Blast and Rollover Events of a Ground Vehicle and its Occupants Using Rigid Body Dynamic Models.

摘要

Due to the severity of forces exerted during an IED blast, ground vehicles undergo multiple sub-events including local structural deformation of the floor, blast-off, free flight and slam-down (including roll-over). The entire blast event from blast-off to slam-down may last as long as 2 seconds in duration depending on several parameters such as vehicle weight, charge size and location. Simulation of the entire blast event is computationally intensive due to the high fidelity levels of the model and the long duration of the event. The purpose of this project was to develop a computationally-efficient, reduced order model to simulate all these events in one single simulation. These reduced order models can be used for rapid evaluations of military ground vehicles due to short turn-around simulation times. Models were developed using MADYMO's rigid body and finite element integration techniques to simulate all critical sub-events a ground vehicle undergoes during a blast event from blast- off to slam-down. The report provides different methodogies used in MADYMO simulations, their performance results and comparisons.