一种运输类飞机初始抖振判定方法  

A method to determine the buffet onset of a transport airplane

作　　者：高文涛[1] 张武林[1] GAO Wentao;ZHANG Wulin

机构地区：[1]中国飞行试验研究院飞机所,陕西西安710089

出　　处：《现代机械》2020年第6期37-41,共5页Modern Machinery

摘　　要：基于某型运输类飞机的试飞数据,结合国外相关经验,建立运输类飞机飞行员处4~8 Hz频率范围的初始抖振的垂向振动加速度上下限。然后利用相对于人体敏感频率范围的计权系数表[1]以及工效性降低限图[2],获得了垂向及航侧向的人体敏感频率范围的初始抖振振动加速度上下限。该方法避免了因飞行员个体差异而导致的数据离散性,考虑了人体对不同频率、不同方向的振动的敏感程度,可以得到更加准确的运输类飞机的初始抖振边界。飞行试验结果表明:该方法可以准确地得到运输类飞机的初始抖振边界。Based on the flight test data of a transport airplane and overseas experience,the pilot seat vertical acceleration bound of the buffet onset was established within the frequency range of 4 Hz to 8 Hz.Then,by using the frequency weighting table,we established the vibration acceleration bound of the buffet onset in different directions within the sensitive frequency.This method can avoid the data discreteness caused by pilots’individual difference.The body sensitivity of different frequencies and different vibration directions is also taken into consideration.In this way a more accurate buffet onset boundary of the transport airplane can be established.The flight test results showed that the buffet onset boundary of the transport airplane had been established accurately by this method.

关 键 词：初始抖振 敏感频率 频率计权 个体差异 抖振边界 

分 类 号：V217.1[航空宇航科学与技术—航空宇航推进理论与工程]