Vibration analysis of the carbody for a fixed-body mining truck

ZHANG Yidan; ZHONG Bing

doi:10.19471/j.cnki.1673-6397.2026.01.015

Abstract：To analyze the dynamic characteristics of the carbody for a certain fixed-body mining truck,SolidWorks software is used to establish the geometric model of the carbody.Three typical working conditions,namely full-load bending,full-load extreme torsion and full-load braking,are selected for finite element modal simulation,and the simulation results are compared and analyzed with the road excitation frequency to verify the rationality of the dynamic performance of the carbody.The results show that under the three working conditions of full-load bending,full-load extreme torsion and full-load braking,the maximum deformations of the carbody are about 0.079 mm,2.968 mm and 2.493 mm respectively,all meeting the requirements of the maximum deformation limit;corresponding to the three working conditions,the maximum stresses of the carbody are 14.996 MPa,86.108 MPa and 45.663 MPa respectively,all meet the limit regulation that the maximum stress shall not exceed 168 MPa.The road excitation frequency is 14.985 Hz,and the first-order natural frequency of the carbody is 19.161 Hz.The natural vibration frequency of the carbody successfully avoids the external excitation frequency,effectively reducing the occurrence of coupling resonance and ensuring good operational stability of the mining truck carbody.