Author/Authors :
Meng, Guangwei School of Mechanical and Aerospace Engineering - Jilin University, Changchun, China , Ren, Chuanxin School of Mechanical and Aerospace Engineering - Jilin University, Changchun, China , Li, Xiaolin College of Construction Engineering - Jilin University, Changchun, China , Zhou, Liming School of Mechanical and Aerospace Engineering - Jilin University, Changchun, China , Li, Feng School of Mechanical and Aerospace Engineering - Jilin University, Changchun, China , Wei, Tonghui School of Mechanical and Aerospace Engineering - Jilin University, Changchun, China
Abstract :
In this article, fatigue life of a bus body is analyzed based on the user target load spectrum. A finite element model of
the bus body is built with characteristics. The static analysis result is obtained by using the inertia release method and a multibody dynamic model is established by using the rigid flexible coupling method. According to user investigation, the user load
spectrum is obtained through dynamic simulation. The average value and amplitude of each level of stress are extracted from the
load spectrum information. With the fatigue properties of the material, the damage value of the bus body is determined by using
the S-N curve method and Miner linear cumulative damage theory. The simulation gives the fatigue life and damage values of the
most dangerous position of the body structure. Calculation shows that the fatigue life of the bus body meets durability
requirements.
Keywords :
Bus body , Rigid-flexible coupling , Inertial release , Fatigue life , Multibody dynamics
