1) flutter margin
颤振裕度
1.
Through the automatic analysis, the frequency factors are gotten which are related to flutter margin, the optimizing equation is also obtained which is expressed by the remarked frequency factor.
通过程序自动分析 ,使用检验方法 ,逐步获得与颤振裕度相关的频率因子 ,得到仅含有显著相关频率因子的最优回归方程 。
2) surge margin
喘振裕度
1.
In order to improve the performance of the flight/propulsion system, additional thrust is obtained by uptrimming the engine pressure ratio in some operation conditions and in part of the flight envelope where an excess surge margin exists.
提出一种基于发动机喘振裕度自适应的飞行 /推进系统综合控制。
3) 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。
4) flutter space
颤振速度[火]
5) surge margin degradation
喘振裕度损失
1.
For co-rotating distortions,the results exhibited significant loss in stability margin and there were two peaks in surge margin degradation corresponding to two distortion rotating frequencies;For counter rotational distortions,the tests showed minimal loss of stability margin,especially in some cases.
利用RB-1995级高压压气机,实验研究了进口旋转总压畸变对其性能和气动稳定性的影响,获得了总压畸变的旋转频率对高压压气机喘振裕度损失的影响结果。
6) surge-to-stall margin
喘振-失速裕度
补充资料：喘振裕度
喘振是发动机的一种不正常的工作状态，是由压气机内的空气流量和压气机转速偏离设计状态过多而引发的。喘振是发动机的致命故障，严重时可能导致发动机空中停车甚至发动机致命损坏。衡量发动机喘振性能的指标叫做“喘振裕度”，就是说发动机的进气口流量变化多少会引发喘振，这个值一般都要求达到15％甚至20％以上。航空涡轮发动机性能要先进，稳定工作范围宽，首先要求喘振裕度要大，压气机工作点距离喘振边界远。其次，发动机抗畸变能力要强。进气口的气有时是不均匀的，尤其是飞机做大机动动作时，进气道唇口气流发生分离，造成压气机进口畸变，气流不均匀。这时发动机的喘振裕度就会减小，加减速又会把一部分喘振裕度消耗掉，也可能造成停车，所以喘振裕度必须足够，对畸变不敏感。导弹的尾焰也容易造成温度场畸变，使发动机停车，所以要有武器发射防喘自动控制系统。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条