采用统一性能衰退轨迹模型的润滑和密封材料加速寿命预测  

Accelerated Life Prediction of Lubricating and Sealing Materials Using Unified Performance Degradation Trajectory Model

作　　者：吕向飞[1,2] 陈进 LYU Xiangfei;CHEN Jin(State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China;Intelligent Manufacturing and Automobile School,Chongqing College of Electronic Engineering,Chongqing 401331,China)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]重庆电子工程职业学院智能制造与汽车学院,重庆401331

出　　处：《机械科学与技术》2023年第5期802-807,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：重庆市教委科学技术研究项目(KJ1503006)。

摘　　要：润滑和密封材料寿命评估和预测方法是工程研究中亟待突破的瓶颈问题。为了在保证加速寿命评估精度的同时,提高加速寿命评估的效率,在传统的加速寿命评估方法的基础上,提出基于时间尺度优化的加速寿命评估方法。首先,建立含时间尺度的性能衰退轨迹统一模型,以均方误差最小化为优化目标,获取最优时间尺度因子;其次,通过非线性最小二乘法识别出轨迹模型的参数,进而建立起衰退速率的加速模型,对常温下的衰退速率进行外推估计;最后,建立老化时间-温度-性能衰退量的三维模型,通过与实测数据的对比,验证了模型的准确性。Life evaluation and prediction methods for lubrication and sealing materials is a bottleneck that needs to be broken.In order to improve the efficiency of accelerated life assessment while ensuring the accuracy of accelerated life assessment,on the basis of traditional accelerated life assessment methods,an accelerated life assessment method based on time scale optimization is proposed.Firstly,a unified model for performance decay trajectory with time scaleis established,and the mean square error minimization as the optimization goal to obtain the optimal time scale coefficientis taken consideration.Secondly,the parameters of the trajectory model through the nonlinear least squares method isidentified,and then the decay rateis established.The acceleration model is used to extrapolate the decay rate at room temperature from accelerated high temperatures.Finally,a three-dimensional model for aging time-temperature-performance decay is established,with which the accuracy of the model is verified by comparing the measured data.

关 键 词：润滑 密封 加速试验 寿命评估 时间尺度优化 

分 类 号：TH117.1[机械工程—机械设计及理论]