基于区间长度等分的疲劳损伤寿命预测模型  

A Fatigue Damage Life Prediction Model Based on Interval Length Division

作　　者：翟银秀[1] 叶南海[1] 蔡鹏[1] 闫彩伟 王利[1] 

机构地区：[1]湖南大学汽车车身先进设计与制造国家重点实验室,长沙410082

出　　处：《机械科学与技术》2014年第7期1091-1094,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51375154)资助

摘　　要：现有疲劳损伤模型寿命计算存在着经验数据,计算结果的准确性有待提高。在疲劳载荷谱技术的基础上,将疲劳加载区间长度进行虚拟等分,根据MINER思想进行疲劳损伤寿命的计算。提出了基于区间长度虚拟等分的疲劳损伤寿命预测模型,并从理论层面和仿真分析试验两个方面加以证明和验证。算例表明:基于区间长度等分的疲劳损伤模型,寿命预测结果的准确与可信性得到了提高。The fatigue life prediction accuracy for structures based on existing fatigue damage models needs to be improved further due to the applications of some experience data. In this paper, a new fatigue life prediction model is presented based on the fatigue load spectrum technique with fatigue loading of virtual equal interval length, and also calculating the fatigue life through the idea of MINER. This model is verified through the theoretical and simulation analysis. Example applications show that the accuracy and credibility of life prediction results of the new model have been improved.

关 键 词：疲劳载荷谱 损伤模型 虚拟区间长度等分 疲劳寿命计算 

分 类 号：TH114[机械工程—机械设计及理论]