1.Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China;2. Civil & Environment Engineering School University of Science and Technology Beijing, Beijing 100083, China
Abstract：By applying the explicit dynamic finite element method the dynamic response of dropping hammer in collision experiments for the extra-large engineering vehicle FOPS was simulated. A 170 tons electric wheel mining dump truck was taken as an example to illustrate the methods for establishing finite element model and applying boundary conditions and loads. The rule of energy conversion of whole process, the impulse force form and the rule of impact deformation were analyzed. The rule of impact deformation for change thickness of roof panel and mass of drop hammer was analyzed when impact energy was constant. The results indicated that the FOPS has been the stage of plasticity mechanism deformation and absorbed 10343J energy at the first impact, 88.6% of the total energy. The FOPS structural component had not invaded DLV during being impacted; the FOPS met the standard of the international requirement. The influence of the deformation of the impact center on thickness of roof panel was great and on mass of drop hammer was less. The impact deformation became smaller with the increase of thickness and the FOPS was unqualified when the roof panel less than 2.4mm.
2011, Vol. 30 
