气动导数识别是大跨度桥梁抗风研究中备受关注的一个问题。
Identification of flutter derivatives is an attractive topic in the field of wind-resistance study of long-span Bridges.
主要讨论了测量参数间的时间延迟对飞机气动导数辨识结果的影响。
This paper briefly discusses the effects on the aerodynamic derivative identification results caused by time delay in measured parameters.
采用理想平板的气动导数研究了各气动导数对颤振临界状态的影响。
The influence of aerodynamic force matrix on critical flutter state with aerodynamic derivatives of four different sections was studied.
提出了一种数值模拟振动的理想平板绕流场，并提取其气动导数的方法。
Numerical simulation of the flow field around the oscillating ideal flat plate is presented to assess the aerodynamic derivatives.
本方法可以用来计算机翼因偏航与侧滑振动而引起的滚转力矩气动导数。
This method can be applied to calculate rolling-moment derivatives of wing due to yaw and sideslip.
用一算例说明了估计过程，获得了纵向气动导数随迎角变化的估计结果。
The estimation procedure is shown by using an example and the estimation results of variation of longitudinal aerodynamic derivatives with Angle of attack are obtained.
可以用它来计算亚音速时弹性飞机的升力分布及11个主要的纵向气动导数。
This method can be used to evaluate the lift distribution and 11 main longitudinal aerodynamic derivatives of elastic aircraft at subsonic speeds.
本文首先回顾了大跨度桥梁颤振分析的基本方法和气动导数识别方法的研究现状。
The fundamental methods for flutter analysis and the current status of aerodynamic derivative identification are reviewed at first in this thesis.
本文主要介绍利用低通滤波、卡尔曼滤波及最小二乘法求取直升机气动导数的方法。
This paper describes a method for extracting the aerodynamic derivatives of a helicopter from flight data by means of low pass filtering, Kalman filtering and least square techniques.
试验结果初步表明，对具有良好流线型的桥梁断面，紊流对气动导数的影响可以忽略。
The results indicate that the effects of turbulence on flutter derivatives of those Bridges with more streamlined deck cross section may be neglected.
气动导数是大跨桥梁结构颤振和抖振分析中确定颤振临界风速和抖振响应的重要依据。
In this paper, the flutter derivatives of a thin plate model under the simultaneous actions of wind and rain are identified by using the Covariance-Driven Stochastic Subspace Identification method.
气动导数是大跨桥梁结构颤振和抖振分析中确定颤振临界风速和抖振响应的重要依据。
Flutter derivatives play very important roles for determining the flutter critical wind speed and buffeting responses of long-span Bridges.
静力三分力系数用于描述风对桥梁的静力作用，气动导数是颤振和抖振分析方法的核心。
Static coefficients are defined to describe the static effect of wind on bridge, and the aerodynamic derivatives are used to describe the aerodynamic effect.
本文采用随机系统识别方法，在模拟的风雨共同作用条件下识别了薄平板模型的气动导数。
In this paper, the flutter derivatives of a thin plate model under the simultaneous actions of wind and rain are identified by using the Covariance-Driven Stochastic Subspace Identification method.
在模拟的紊流风场中，应用这一方法对平板和江阴长江大桥的节段模型进行了试验，识别了其气动导数。
A thin plate and the sectional model of the Jiangyin Bridge were tested in turbulent wind in a wind tunnel to extract their flutter derivatives.
具有任意曲线前缘的亚音速升力面的气动敏感性导数由核函数法给出。
Aerodynamic sensitivity for subsonic lifting-surface with arbitrary curved leading edge is evaluated by kernal function method.
设计变量可包含复合材料结构的铺层方向角。广义气动力导数计及正交振动形态导数的影响。
The design variables include the ply orientations of composite material, and the derivatives of generalized aerodynamic forces involve normal modes derivatives.
阐述了非对称气动力及非对称静、动导数产生的机理。
The mechanism of inducing asymmetrical aerodynamic characteristics is described.
大振幅试验，非定常空气动力，空气动力模型，洞壁干扰，动导数仿真，数学模型，模糊逻辑，飞行仿真。
Large amplitude test, Unsteady aerodynamic, Wall influence, dynamic derivative simulating, Mathematic model, Fuzzy logic, Aerodynamicmodeling, Flight simulating.
涉及的气动力、力距和纵向稳定导数等则由三维低阶板块法计算获得。
Aerodynamic force, moments, and longitudinal stability derivatives are estimated by three-dimensional low-order panel method.
涉及的气动力、力距和纵向稳定导数等则由三维低阶板块法计算获得。
Aerodynamic force, moments, and longitudinal stability derivatives are estimated by three-dimensional low-order panel method.
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