Optimization design of torsion beam structure of car based on fatigue life analysis

Abstract

Taking the torsional beam of the car as the research object, the fatigue life of the torsional beam is analyzed through the simulation experiment, and the optimization scheme is selected according to the life of the torsional beam. Firstly, eight component thicknesses are selected as design variables by Plackett-Burman experimental design method, and the radial basis function neural network approximate model of the beam is established. Taking the maximum equivalent stress of the beam as the optimization objective, the beam mass, and the maximum deformation as the constraint conditions, the multi-objective optimization is carried out, and then two new structural design schemes are carried out for the parts with a rich life. The optimization results show that the maximum deformation is reduced by 15.9%, the maximum equivalent stress is reduced by 10.1%, and the overall life of the beam is extended by 40.6%.

Integrated design of the torsion beam electric driving axle

“…To this end, it is necessary to check the stress of the torsion beam type driving axle when the fully loaded vehicle is driven by a single motor. Under this working condition, in addition to the gravity of the full-loaded vehicle body on the sleeves on both sides, there are also gravity of the motors on both sides, the driving force on the right side of the vehicle and the friction on the left side of the vehicle [13]. To improve accuracy of the analysis results, the driving force here is the maximum driving force, and the friction is the sliding friction.…”

“…By substituting the known parameters into Eqs. (13)(14)(15)(16), there are: 𝐹 = 5880 N, 𝑇 = 135.5 Nm, 𝑇 = 822.2 Nm, 𝐹 = 343 N.…”

Component Design and Strength Analysis of Coffin Lowering Machine for COVID-19 Corpse: A Problem-Based Learning

“…Component 4 was the most critical component compared with 1 and 5 because there was torsional force. Torsional structure would experience fatigue damage because it could twisting and propagating crack (Yang et al, 2020). The following section will discuss the life of each component in detail.…”