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论文:2013,Vol:31,Issue(1):109-114 |
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引用本文： |
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詹浩, 张俐娜. 弹性飞机连续紊流时域响应评估方法[J]. 西北工业大学 |
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Zhan Hao, Zhang Lina. A Method for Estimating Time Domain Response of Continuous Turbulence of Elastic Aircraft[J]. Northwestern polytechnical university |
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| 弹性飞机连续紊流时域响应评估方法 |
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| 詹浩, 张俐娜 |
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| 西北工业大学 航空学院, 陕西 西安 710072 |
| 摘要: |
| 大气紊流对民用飞机的使用有较大影响,引起飞机乘坐品质恶化、操纵性差和结构疲劳等问题。分析和研究大气紊流及其相关课题对民机的研发具有重要意义。简述连续紊流速度场的数值模拟方法,给出飞机连续紊流响应仿真计算流程以及连续紊流载荷任务分析准则流程。以某型飞机为例,计算了连续紊流作用下升力的时间历程。以飞机重心处法向过载为研究对象,根据任务分析准则估计了连续紊流作用下飞机的使用过载。结果表明各个任务段内的使用过载随马赫数的增加而增加;随飞行高度的升高而降低。设定任务剖面内的使用过载估算值与设计要求值基本相符。 |
| 关键词:
弹性飞机
连续紊流响应
非定常计算
飞行力学
模态叠加法
任务分析准则
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| A Method for Estimating Time Domain Response of Continuous Turbulence of Elastic Aircraft |
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| Zhan Hao, Zhang Lina |
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| College of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| The atmospheric turbulence has adverse effects on the embarkation quality, controllability and structuralfatigue of a civil aircraft.To our knowledge, there are few papers in the open literature dealing with the theme men-tioned in the title.Therefore, we propose a method for simulating the atmospheric turbulence field of an elastic air-craft.Its core consists of: (1) we couple the calculation of atmospheric turbulence, aerodynamic elasticity andflight dynamics as shown by the block diagram in Fig.3 and establish the mathematical model of the flight state andtrajectory of the elastic aircraft under continuous turbulence; (2) we give the mission analysis criteria of continuousturbulence load as shown in Fig.5.Finally, taking a certain elastic aircraft as an example, we simulate the varia-tion of its lift coefficient with time and use the mission analysis criteria to estimate the normal overload at its gravitycenter.The simulation results, given in Figs.2, 4 and 7 and Table 4, show preliminarily that: (1) the normal o-verload of the elastic aircraft during its various missions increases with increasing Mach number but decreases withincreasing flight altitude; (2) The estimated value of the normal overload of a given mission profile is in agreementwith that required by an engineering design. |
| Key words:
aircraft
atmospheric turbulence
computational fluid dynamics
estimation
flight dynamics
mathe-matical models;elastic aircraft
continuous turbulence
mission analysis criterion
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| 收稿日期: 2012-03-15
修回日期:
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| DOI: |
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Email： |
| 作者简介: 詹浩(1972-)，西北工业大学教授、博士生导师，主要从事飞行器设计、空气动力学等研究。
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| 詹浩 在本刊中的所有文章 |
| 张俐娜 在本刊中的所有文章 |
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