高压转子非线性接触模型的ACPSO有限元修正

针对精确建立航空发动机高压转子有限元模型的问题,提出了基于AC-PSO算法修正有限元模型描述航空发动机非线性接触的方法。首先在拉杆结构线性接触力学模型的基础上,建立其非线性模型。其次将模型修正问题转化为求解定义在时域的误差函数的极小值,运用AC-PSO算法对惯性权重w进行自适应动态调整,每一时刻对每一粒子不同对待。最后以某型航空发动机高压转子模型为例进行仿真。通过与非线性模型的PSO修正结果及线性模型的AC-PSO修正结果比较,该方法可有效进行模型修正。

Nonlinear Finite Element Contacting Model Updating in High Pressure Spool Based on Adaptive Cloud PSO Model

A method is propounded in this paper to update finite element model of high pressure spool in aero engine to describe the non-linear contacting surfaces exactly. Firstly, the non-linear model is founded based on the linear model in rod fasten rotor. Secondly, it is posed as the minimization of an error function defined in the time domain. The minimization is carried out by a novel particle swarm optimization method based on adaptive cloud distributing model, which treats its different particles distinctly. Finally, the method has been tested through a simulated function model and finite element model of high pressure spool. The performances of the proposed adaptive algorithm are effective in comparison with other related algorithms.