关键词: 弹性液动轴承, 全局敏感性分析, PE-HMGE算法, 多参数优化

Abstract: Multi-parameter optimization design of complex nonlinear system involves huge computational work, and the optimal solution in theory is difficult to obtain. A new multi-parameter and multi-objective optimization strategy that combines the global sensitivity analysis with optimization algorithm of PE-HMGE is proposed. By using the variance-based Sobol global sensitivity analysis, the complex system model is simplified, and the sensitivity parameters are defined to construct the multi-objective optimization model and the optimal solution is obtained by using the optimization algorithm of PE-HMGE. This method is used for simplified model optimization design of lubrication characteristics of main bearings. According to the compared simulation results, the minimum oil film thickness improves by 39%; the peak asperity contact pressure and the average friction power loss decreases by 45% and 19% respectively. The experimental results show that lubrication characteristics of bearings are greatly improved, which has proved the validity of the proposed new method

Key words: elasto-hydrodynamic bearing, global sensitivity analysis, optimization algorithm of PE-HMGE, multi-parameter optimization