Handling Stability Simulation and Test Research on an 8×4 Type Construction Truck

Abstract

Full-vehicle model plays a key role in vehicle handling stability simulations, and the same vehicle model does not adapt to all kinds of vehicle simulations. In the thesis, the vehicle mechanisms of an 8×4 type construction truck were appropriately simplified and the fullvehicle parameterized multi-body dynamic model was developed according to the topology mechanical map of each part. The vehicle model suitability was researched through comparing the vehicle simulation results with the test results in lemniscate and returnability simulations. The comparison results show that the lemniscate simulation errors of the steering wheel angle, yaw angle velocity and lateral acceleration amplitude of the cargo mass centre are 3.9%, 4% and 4.4% respectively, and the returnability simulation errors of the residual steering wheel angle, residual yaw angle velocity and lateral acceleration of the cargo mass centre are 95%, 77.8% and 80% respectively. The simulation and test results all show that the lemniscate simulation errors are smaller than the returnability simulation errors because the model input was the steering wheel angular displacement in lemniscate simulation while the model input was the forces caused from the road and vehicle movement in returnability simulation. In brief, there exist significant error variations for the same vehicle model in different simulations.

Finite element analysis of a FeC, Cr-V and Al 7075-T6 leaf springs for light vehicle suspension system

“…are examples of composed materials used in the manufacturing of leaf springs. The replacement of steel with an optimally designed composite material leaf spring can provide 92% weight reduction [3]. [4] optimized the development of 56SiCr7 leaf spring and micro-hardness measurements show surface degradation effects.…”