飞机疲劳载荷谱分析的一种新方法  

A New Method of Aircraft Fatigue Loading Spectrum Analysis

作　　者：李天亮[1] 邹仕军[1] 孙冬[1] 何秀然[1] 

机构地区：[1]空军工程大学工程学院飞行器与动力工程系,西安710038

出　　处：《机械科学与技术》2006年第6期690-692,715,共4页Mechanical Science and Technology for Aerospace Engineering

摘　　要：在传统雨流计数法的基础上,提出了一种更优良的雨流计数新算法———等效载荷循环雨流计数法。该法按时间顺序计算载荷循环,完整记录了全部载荷历程而不改变其大小和顺序,对疲劳载荷发生时刻和疲劳损伤程度的分析更加准确,弥补了传统雨流计数法的缺陷。通过分析可知,该算法简洁明确,精确度高,抗随机噪声干扰能力强。最后在某型飞机部件载荷谱的疲劳分析实验,证明了该算法的有效性。On the basis of traditional raln-flow counting, the paper presented a new excellent rain-flow counting method, namely equivalent loading cycle rain-flow counting. The method counts loading cycles by time, registers all loading courses but does not alter their magnitude and sequence. Therefore the method analyzes more precisely when fatigue loading and how much fatigue damage occurs. It thus overcomes the shortcomings of traditional rain-flow counting. The analysis shows that the method is simple and clear, highly precise, strongly resistant to random noise interference. An experiment on fatigue loading spectrum of the parts of an aircraft proved that the method was effective.

关 键 词：飞机与发动机 疲劳寿命 雨流计数法 载荷谱 

分 类 号：V215[航空宇航科学与技术—航空宇航推进理论与工程]