运输类飞机实测突风谱编制方法研究
Development Method of Measured Gust Spectra for Transport Aircraft
王勇彬 1卫昆钰 2贺小帆2
作者信息
- 1. 空装西安局某军事代表室,西安 710089
- 2. 北京航空航天大学 航空科学与工程学院,北京 100191
- 折叠
摘要
目的 针对运输类飞机突风载荷谱编制需求,基于实测载荷数据和任务分析法原理,采用 5×5谱编制方法,建立一种运输类飞机实测突风谱编制方法.方法 首先依据任务分析确定飞机典型任务剖面和任务段,对实测载荷数据进行预处理和统计分析,获得突风增量过载超越数的分布参数.然后通过得到的平均突风增量过载累积超越数曲线,编制各任务段载荷谱,进而编制任务剖面谱,按任务剖面比例,对任务剖面谱进行随机排序,编制得到了突风增量过载飞-续-飞谱.最后给出了一个示例以详细阐明该编谱方法.结果 该型运输机爬升任务段突风载荷谱相较其余任务段偏重.结论 通过该方法编制的突风载荷谱能够较好地反映实测突风载荷数据特点,方法具备合理性和可行性.
Abstract
Aiming at the demand of gust load spectra for transport aircraft,the work aims to establish a method for develop-ing the measured gust spectra for transport aircraft by 5×5 spectrum development method based on the measured load data and the task analysis method.Firstly,according to the task analysis method,the typical mission profile and mission section of the aircraft were determined,and the measured load data were pre-processed and analyzed statistically to obtain the distribution pa-rameters of the incremental normal acceleration exceedance number of the gust.Then,the curve of the average incremental normal acceleration cumulative exceedance number of the gust was obtained to develop the load spectrum of each mission sec-tion by the method of 5×5 spectrum,and then the mission profile spectra were developed and randomly ordered according to the proportion of the mission profile,so as to obtain the flight to flight spectra of the gust incremental normal acceleration.Fi-nally,an example was given to illustrate the method in detail.In the climbing phase of this type of transport aircraft,the gust load spectra were relatively more significant compared to those of other mission sections.The gust load spectra developed by this method can effectively reflect the characteristics of measured gust load data,demonstrating the rationality and feasibility of the approach.
关键词
运输类飞机/实测谱/载荷谱编制方法/突风过载/过载累积超越数曲线/5×5谱Key words
transport aircraft/measured spectrum/load spectrum development method/gust normal acceleration/normal acceleration cumulative exceedance number curve/5×5 spectrum引用本文复制引用
基金项目
航空科学基金(201909051002)
装发基础研究项目(514010502)
出版年
2024
NETL
NSTL
万方数据