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1)  Flutter critical speed
颤振临界速度
2)  critical flutter speed
惯性颤振临界速度
3)  flutter critical wind speed
颤振临界风速
1.
The results show that the flutter critical wind speed can be significantly increased by mounting an upper central stabilizing barrier on the top surface of the upper chords of the transverse frames of the truss girder,and the flutter .
结果表明,在桁架加劲梁横梁上弦杆上侧设置适当高度的上中央稳定板可以较大幅度地提高桥梁的颤振临界风速,并且在常规的稳定板高度范围,颤振临界风速基本上随上稳定板高度的增加而提高;在横梁上弦杆下侧的主桁架内设置适当高度的下中央稳定板也能在一定程度上改善桥梁颤振稳定性,但效果明显不如上稳定板,在某些高度情况下甚至会降低桥梁的颤振临界风速。
2.
The variation pattern between flutter critical wind speed of bridge with flat box deck and wind yaw angle is significantly affected by wind attack angle.
扁平箱形截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。
3.
Thus the flutter critical wind speeds are much lower and the bridge is more unstable during this period.
尤其是在施工初期 ,结构的刚度比成桥要低得多 ,使得颤振临界风速最低 ,更容易发散 。
4)  critical flutter velocity
颤振临界风速
1.
Numerical simulations for aerodynamic derivatives and critical flutter velocity of bridge deck;
数值模拟桥梁断面气动导数和颤振临界风速
2.
With the span of long-span bridges is becoming longer, the stiffness and damping ratio of structures decrease clearly and then critical flutter velocity falls accordingly.
随着大跨桥梁修建的日益长大化,其刚度和阻尼明显减小,因此颤振临界风速也大幅降低,颤振问题成为大跨桥梁抗风设计的关键。
5)  critical flutter wind speed
颤振临界风速
1.
Using computational fluid dynamics (CFD) method we studied the critical flutter wind speed of bridge box girder with or without central slot.
用计算流体动力学 (CFD)方法研究了箱型桥梁断面中间开槽前后颤振临界风速的变化 ,结果表明中间开槽的效果与断面头部形状和开槽宽度有密切关系 。
6)  flutter speed
颤振速度
1.
The Theodorsen s unsteady aerodynamic theory and the strip theory are used to describe the aerodynamic model,then the flutter equations are obtained,and the flutter speed are calculated at various feedback coefficient and ply angle.
采用西奥道生非定常气动理论结合片条理论构建气动力模型,获得机翼的颤振方程,并利用v-g法分析了复合材料的铺层方式和反馈增益对颤振速度的影响。
2.
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。
补充资料:临界速度
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性质:(1)当气体作绝热流动通过管子或喷嘴时,在一定的上游压力下,流速随着下游压力的减少而增加。但当管内及喷嘴喉部流速达到在此状态下的压力波传播速度即音速时,无论下游压力如何再降低而流速仍然不变。流动达到此临界情况下的速度称为临界速度。(2)流体流动时从层流转变为湍流的流速称为,临界速度。

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