Performance parameter optimization of excavator cab shock absorbers based on Kriging method
1.School of Mechanical Engineering, Shandong University, Jinan, Shandong 250061, China; 2.Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Jinan, Shandong 250061, China
Abstract： To solve the problem of restraining noise in excavator cab, the FEM model of whole excavator was established, and the performance parameters of cab shock absorbers were optimized to reduce the sound pressure level (SPL) peaks and the overall SPL at driver right ear (DRE). Based on the sample points from Latin Hypercube experiment of stiffness/damping parameters of shock absorbers, the Kriging surrogate model was constructed. The Pareto front was obtained by NSGA-Ⅱgenetic optimization algorithm with several SPL peaks as objective functions and performance parameters of shock absorbers as va-riables. The FEM simulations were re-analyzed by the optimum combination of performance parameters. The results indicate that it is practicable to decrease the SPL peaks and the overall SPL at DRE by adjusting performance parameters of cab shock absorbers. The vibration noise performance at the representative places of the windshield, the floor under seats and the dashboard are also improved.
2015, Vol. 36 
