1. A method of simulating a vehicle impact comprising the steps of: generating a first finite element model of the vehicle, wherein the first finite element model includes a plurality of boundary points on the vehicle; running at least one vehicle impact simulation on the first finite element model to generate impact data at each of the boundary points of the first finite element model; generating a multi-body model that includes a vehicle occupant and at least one vehicle component, wherein the multi-body model includes a plurality of boundary points that coincide with the boundary points included in the first finite element model; running at least one vehicle impact simulation on the multi-body model by inputting impact data generated at each of the boundary points of the first finite element model into the boundary points of the multi-body model; generating a partial vehicle finite element model that includes a plurality of master nodes and a plurality of slave nodes, wherein boundary conditions input at the master nodes generates output data at the slave nodes; generating a coupled model that includes at least a portion of the multi-body model and at least a portion of the partial vehicle finite element model; and running at least one impact simulation with the coupled model to thereby identify the effects of the impact on at least one of the vehicle and the occupant of the vehicle.