Technical Paper
Efficient Fatigue Performance Dominated Optimization Method for Heavy-Duty Vehicle Suspension Brackets under Proving Ground Load
2024-04-09
2024-01-2256
Lightweight design is a key factor in general engineering practice; however, it often conflicts with fatigue durability. In this study, a methodology to enhance the efficiency of fatigue optimization is proposed, with a case study on heavy-duty vehicle suspension brackets illustrating the approach. This case study is based on random load data collected from fatigue durability tests in proving grounds, and fatigue failures of the heavy-duty vehicle suspension brackets were observed and recorded during the tests. An integrated approach to multi-objective fatigue optimization was introduced by employing multi-axial time-domain fatigue analysis under random loads combined with the non-dominated sorting genetic algorithm II with archives. While evaluating fatigue life within optimization loops, particularly for multi-axial random load fatigue in the time domain, is time-intensive, this study introduces modifications to improve computational efficiency.