Commercial Vehicle Cab Fatigue Load Decomposition and Validation

Development of cab fatigue durability performance is very important in the design and manufacture of trucks, but the cab fatigue load is difficult to get by the test. Obtaining the cab fatigue load and making simulation of the cab fatigue in the pre-development period will improve and promote the performance of cab fatigue durability. Aiming at the above problems, a method to obtain the cab fatigue load is proposed. The acceleration of the cab suspension is collected first, then the rigid and flexible coupling multi-body dynamics model of cab by 421 driving mode is established, and the cab fatigue load is extracted by virtual iteration of Femfatlab, and finally it verifies the accuracy of the fatigue load and the effectiveness of the method by comparing the virtual strain with the measured strain.