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Roll characteristic analysis of dump truck unloading based on virtual prototyping

According to the rollover problem of dump truck with a T-type lifting mechanism during unloading, a detailed multi-body dynamic model of a dump truck was established by using SIMPACK software. Considering each main factor's effect, the roll characteristic of the dump truck during unloading operation was studied by simulation. The results showed that, when the dump truck is unloading, in the case of constant load, with the cross slope angle increases, the critical lifting angle decreases; in the case of same cross slope angle, with the load increases, the critical lifting angle decreases, and with the increasing of the mass center of the material offsets, the critical lifting angle decreases similarly; in the case of the mass center of the material offsets in the same degree, with the cross slope angle increases, the critical lifting angle decreases. This study can provide a reference to reduce and avoid the dump truck rollover phenomenon during unloading operation.