某机载雷达天馈伺系统结构疲劳寿命评估  

Fatigue Life Evaluation of the Antenna Feed and Servo System of an Airborne Radar

作　　者：杨志刚[1] 房凯[2] Yang Zhigang;Fang Kai(Nanjing Research Institute of Electronics Technology, Nanjing 210039;Military Representative Office of PLA in NRIET, Nanjing 210039)

机构地区：[1]南京电子技术研究所,南京210039 [2]中国人民解放军驻南京电子技术研究所军事代表室,南京210039

出　　处：《火控雷达技术》2018年第4期90-93,98,共5页Fire Control Radar Technology

摘　　要：机载雷达作为重要的航空电子设备,要求其结构在一定寿命周期内必须能够承受载机特有的随机振动环境,且不发生破坏。随机振动是造成机载雷达结构发生疲劳损坏的关键因素,如何找出结构的薄弱部位,并对薄弱部位进行疲劳寿命评估是在机载雷达研发阶段的重要工作。本文基于有限元法及Miner线性累积损伤理论系统阐述了进行结构疲劳寿命评估的理论依据及详细的工程实践方法,并对某机载雷达天馈伺系统结构进行了疲劳寿命评估。As one of the important aviation electronic equipment, airborne radar has to ensure that no damage occurs in its structure within its life cycle under unique random vibration of the aircrafts. Random vibration is the main cause for fatigue damage of airborne radar structure. How to find out the weak parts of airborne radar structure and evaluate their fatigue life is an important work at the research and development stage of airborne radar. In this paper, the theory basis and detailed practical method of fatigue life evaluation are elaborated systematically based on the finite element method and Miner linear cumulative damage theory. In addition, the fatigue life evaluation of the antenna feed and servo system of a certain type of airborne radar is performed.

关 键 词：机载雷达 天馈伺系统 疲劳寿命 累积损伤 有限元 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]