TY - JOUR
T1 - Multibody dynamic analysis of a gear transmission system in electric vehicle using hybrid user-defined elements
AU - Liu, Chao
AU - Fang, Zong De
AU - Liu, Xuan
AU - Hu, Sheng Yang
N1 - Publisher Copyright:
© IMechE 2018.
PY - 2019/3/1
Y1 - 2019/3/1
N2 - Considering flexibility of the support shafts as well as bearing supports, the effect of meshing impact force and meshing stiffness on the dynamic behavior of a gear transmission system in electric vehicle is investigated in this paper using the proposed hybrid user-defined element method. First, a structured grid generation method is introduced to establish accurate mesh models of the pinion and gear teeth. Second, coupling the tooth mesh models and the flexible shafts as well as bearings, two finite element models are, respectively, constructed for the two helical gear pairs of the electric vehicle reduction unit to calculate the meshing impact force. Next, the basic mechanism of meshing impact is explained in detail according to the finite element results, and the impact force is determined as one of the main internal excitations substituted into the dynamic model established by the hybrid user-defined element method. Under 50 N m input torque and 12,010 r/min rotational speed of the input shaft, the simulation results by the hybrid user-defined element method indicate that the example system reaches a steady state and the vibrations primarily occur at the meshing frequencies. With an increment of 600 r/min of the input rotational speed, it is also concluded from the results that (1) the calculated impact force approximately presents linear growth with the increase of the input shaft rotational speed and (2) the root mean square values of the vibration acceleration generally grow with the increase of the speed.
AB - Considering flexibility of the support shafts as well as bearing supports, the effect of meshing impact force and meshing stiffness on the dynamic behavior of a gear transmission system in electric vehicle is investigated in this paper using the proposed hybrid user-defined element method. First, a structured grid generation method is introduced to establish accurate mesh models of the pinion and gear teeth. Second, coupling the tooth mesh models and the flexible shafts as well as bearings, two finite element models are, respectively, constructed for the two helical gear pairs of the electric vehicle reduction unit to calculate the meshing impact force. Next, the basic mechanism of meshing impact is explained in detail according to the finite element results, and the impact force is determined as one of the main internal excitations substituted into the dynamic model established by the hybrid user-defined element method. Under 50 N m input torque and 12,010 r/min rotational speed of the input shaft, the simulation results by the hybrid user-defined element method indicate that the example system reaches a steady state and the vibrations primarily occur at the meshing frequencies. With an increment of 600 r/min of the input rotational speed, it is also concluded from the results that (1) the calculated impact force approximately presents linear growth with the increase of the input shaft rotational speed and (2) the root mean square values of the vibration acceleration generally grow with the increase of the speed.
KW - electric vehicle
KW - gear transmission system
KW - hybrid user-defined element method
KW - meshing impact force
KW - Multibody dynamic analysis
UR - http://www.scopus.com/inward/record.url?scp=85052336033&partnerID=8YFLogxK
U2 - 10.1177/1464419318789185
DO - 10.1177/1464419318789185
M3 - 文章
AN - SCOPUS:85052336033
SN - 1464-4193
VL - 233
SP - 30
EP - 42
JO - Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics
JF - Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics
IS - 1
ER -