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论文:2014,Vol:32,Issue(5):822-827 |
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引用本文： |
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符文星, 尚妮妮, 常晓飞, 陈经纬, 闫杰. 离散阵风幅值计算的方法研究[J]. 西北工业大学 |
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Fu Wenxing, Shang Nini, Chang Xiaofei, Chen Jingwei, Yan Jie. A New Method for Calculating Magnitude of Wind Gust[J]. Northwestern polytechnical university |
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| 离散阵风幅值计算的方法研究 |
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| 符文星, 尚妮妮, 常晓飞, 陈经纬, 闫杰 |
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| 西北工业大学航天学院, 陕西 西安 710072 |
| 摘要: |
| 随机阵风幅值对于飞行器的结构设计和操作性能都是很重要的。针对随机阵风风速幅值的计算方法中存在着无法精确计算、用函数匹配曲线和基于统计经验置信度单一等问题,提出一种新的基于随机阵风频谱相关性直接解算离散阵风幅值并可任意指定幅值置信度的研究方法。给出随机阵风的频谱和离散模型,推导得出了随机阵风幅值的计算函数,并完成结果计算验证。结果表明:该计算方法能准确、方便地计算随机阵风的幅值大小,并可根据不同的性能指标需求指定幅值置信度的大小。 |
| 关键词:
随机阵风
风速幅值
置信度
相关函数
半宽度
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| A New Method for Calculating Magnitude of Wind Gust |
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| Fu Wenxing, Shang Nini, Chang Xiaofei, Chen Jingwei, Yan Jie |
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| College of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| Analysis of spacecraft vehicle response to the magnitude of random wind gust during flight is important inthe establishment of design structural requirements and operational capability.Currently,there are lots of disadvan-tages in the calculation methods of random gust magnitude,such as low precision,fitting a function to curves andonly a single confidence level by statistics.In this paper,a new method based on the spectral correlation is provid-ed for calculating the magnitude of wind gust as a function of both gust half-wavelength and the desired probabilitylevel of exceeding a specified gust magnitude.The spectrum and discrete model of random gust are given.Then es-tablish the function and the derivation to calculate random gust magnitude based on the correlation.It is shown thatthe new technique is exact,convenient and also allows for the selection of risk level of exceeding gust magnitude. |
| Key words:
autocorrelation
Fourier transforms
inverse problems
normal distribution
probability density func-Tion
stochastic models
turbulent flow
wind effects
wavelength;confidence level
correlation
gustMagnitude
half-wavelength
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| 收稿日期: 2014-03-01
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(91216104)资助 |
| 通讯作者:
Email： |
| 作者简介: 符文星(1974-)，西北工业大学副教授、博士，主要从事飞行器控制与仿真的研究。
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参考文献: |
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[1] 肖业伦，金长江. 大气扰动中的飞行原理[M]. 北京:国防工业出版社，1993Xiao Yelun，Jin Changjiang. The Principle of Flight in Atmosphere Disturbance[M]. Beijing，National Defense Industry Press，1993 (in Chinese)[2] Standard M. Military Standard-Flying Qualities of Piloted Aircraft[R]. MIL-STD-1797A，Departmong of Defense，1990[3] Adelfang S I，Smith O E. Gust Models for Launch Vehicle Ascent[C]∥American Institute of Aeronautics and Astronautics Aer-ospace Sciences Meeting and Exhibit，Reno，NV，USA，1998: 12-15[4] 王文龙. 大气风场模型研究及应用[D]. 长沙: 国防科学技术大学，2009Wang Wenlong. Atmospheric Wind Field Modeling and Its Application[D]. Changsha，National University of Defense Technol-ogy，2009 (in Chinese)[5] 屈菊香，李勇. 改进的紊流风模型及其仿真算法[J]. 系统仿真学报，2004，16(1): 10-13Qu Juxiang，Li Yong. An Improved Turbulence Model and Its Simulation Algorithm[J]. Journal of System Simulation，2004，16(1): 10-13 (in Chinese)[6] Chalk C R，Neal T P，Harris T M，et al. Background Information and User Guide for MIL-F-8785B(ASG)，Military Specifica-tion-Flying Qualities of Piloted Airplanes[R]. AFFDL-TR-1969-72[7] Daniel G E. Terrestrial Environment (Climatic) Criteria Guidelines for Use in Aerospace Vehicle Development[J]. NASA TM，1993[8] Johnson D L，Wanghan W W. Terrestrial Environment (Climatic) Criteria Handbook for Use in Aerospace Vehicle Development[J]. NASA-HDBK，2004，1001(11)[9] Vaughan W. Analysis of Discrete Atmospheric Gust Velocity Data for Use in Missile Design and Performance Studies[J]. ArmyBallistic Missile Agency Report DA-TR-68-59，1959 |
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