A fourth model may be tested for flutter speed.
第四个模型可用来进行颤振试验。
The results indicate that in the case of the appropriate state error the flutter speed is increased.
计算表明：合适的状态加权阵使颤振速度提高。
A direction derivative method for the analysis of the effects of asymmetric stores on flutter speed is presented.
提出了一种分析不对称外挂对飞机颤振影响的方向导数法。
Then the gradients of flutter speed and frequency of wing with respect to the design variables were deduced with analytical method.
使用解析方式推导得到机翼的临界颤振速度、颤振频率对于设计变量的灵敏度表达式。
To increase flutter speed of airfoil in aircraft engineering, the schemes that makes use of attached weights in leading-edge of aileron are discussed.
为了提高某型飞机机翼颤振速度，详细探讨利用副翼前缘配重提高颤振速度的方案。
The varying tendency of flutter speed can be deduced when the store parameters are asymmetric, according to the results of the original symmetric flutter boundary curves.
该法在原始对称构型的颤振边界曲线已知的情况下，就能推断结构参数不对称时颤振速度的变化趋势。
The hairs flutter in moving water as flags do in moving air, and the way in which they flutter contains information about the direction and speed of the water moving past them.
绒毛在水中就像气流中的旗帜一样摆动，它们摆动的方式包含着流经它们的水流方向和流速信息。
The panel flutter boundaries are finally determined and the effect of temperature, airflow speed, etc, on the panel flutter characteristics is analyzed.
最后确定了壁板的颤振边界，分析了温度、来流速度等因素对壁板颤振特性的影响规律。
The experimental results indicate that the flutter critical speed increases by more than 14 percent.
实验结果表明：颤振临界速度提高了14%以上。
The studying of the different sections deck shows: the variation pattern of flutter critical wind speed of bridge with flat box deck and wind yaw Angle is significantly affected by wind attack Angle.
研究发现：扁平箱形断面桥梁的颤振临界风速与风偏角的关系明显地受到风攻角的影响。
Panel flutter is a typical supersonic aeroelastic phenomenon taking place in high speed aircraft.
壁板颤振是发生在高速飞行器上的一种典型的超音速气动弹性现象。
Some research show the lowest flutter critical wind speed may occur in skew wind case.
有关研究显示桥梁最低颤振临界风速可能发生在平均风与桥跨成某一偏角的斜风情况。
A suspension bridge project is taken as an example, in which the evolution of critical wind speed of flutter during bridge erection is studied by a multi-mode flutter analysis approach.
以某悬索桥设计方案为工程背景，应用多模态颤振分析方法，分析了该桥架设阶段颤振临界风速的发展趋势。
When the head's shape or width of central slot is unsuitable, central slot decreases critical flutter wind speed instead of increasing it.
当头部形状或开槽宽度不合适时，中间开槽不但不能提高颤振临界风速，反而降低了断面的颤振稳定性。
The results of the wind tunnel test show the flutter critical speed of the wing model increases by 37% after the implementation of AFS system.
风洞试验结果说明，采用颤振主动抑制控制系统后，机翼的颤振临界速度可提高37%。
In this paper a stiffness simulation calculation method of low speed flutter models of an aeroplane is studied.
本文探讨了飞机低速颤振模型刚度模拟计算的一种方法。
The rudder system of submarine may induce the low-speed flutter.
潜艇的舵系统是会出现低速颤振的。
Flutter derivatives play very important roles for determining the flutter critical wind speed and buffeting responses of long-span Bridges.
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。
This paper gives a brief description of the whole process of the low-speed wind tunnel test for active flutter suppression of a two-dimensional wing model with trailing edge control surface.
本文简要地阐述了具有后缘控制面的二元机翼模型主动颤振抑制低速风洞试验的全过程。
Finally, to determine the bridge flutter, galloping and buffeting critical wind speed as a method of judging the stability, buffeting response analysis is the key point.
最后，对成桥运营阶段确定了颤振、驰振临界风速以此来做为稳定性的判断依据，并重点进行脉动风场的抖振响应分析。
Finally, to determine the bridge flutter, galloping and buffeting critical wind speed as a method of judging the stability, buffeting response analysis is the key point.
最后，对成桥运营阶段确定了颤振、驰振临界风速以此来做为稳定性的判断依据，并重点进行脉动风场的抖振响应分析。
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