摘要
目前现有的疲劳寿命计算软件存在操作比较复杂,方法较为单一的不便之处。基于振动疲劳频域寿命的理论基础,利用LabVIEW的图形化编程平台将一些新的频域计算方法程序化以便于工程实践应用,达到更方便而准确地得出频域疲劳寿命的目的。本文对已有的疲劳寿命预估软件进行频域寿命算法的编制并优化其界面和算法,然后用算例对其计算结果的准确性进行判断,算例使用航空常用的材料2024-O铝合金的对称布局加筋板试验件进行有限元谱响应计算,在此基础上依据危险点的功率谱密度曲线分别得出有限元仿真以及编制程序的疲劳寿命,并将其进行对比,两种方法计算寿命的结果在允许误差范围之内。此结果说明新的寿命预估软件可以应用到工程实践当中。
At present,the existing fatigue life calculation software is more complicated and the method applied is more inconvenient,Based on the theoretical basis of vibration fatigue frequency domain life,this paper uses LabVIEW＇s graphical programming platform to program some new frequency domain calculation methods to facilitate the application of engineering practice in order to achieve a more convenient and accurate way to get the frequency of fatigue life purposes.In this paper,the existing fatigue life prediction software is used to compute and optimize the interface and algorithm of the vibration fatigue life of frequency domain and then a example is presented to judge the accuracy of its calculation results.A finite element spectral response calculation was performed on a symmetrical layout stiffened plate test piece of 2024-O aluminum alloy,based on the power spectral density curve of the frangible point,the finite element simulation method and the programming method are respectively used to estimate the vibration fatigue life,and the results are compared,it shows that the calculated results are within the allowable error range.This result proves that the new life prediction software can be applied to engineering practice.
作者
毕鑫
王轲
Bi Xin;Wang Ke(College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
出处
《国外电子测量技术》
2018年第4期136-140,共5页
Foreign Electronic Measurement Technology
