1)buffeting[英]['b?fiti?][美]['b?f?t??]低频颤振
1.Firstly the effects of the gap at collector throat and its size on buffeting in automotive wind tunnel are studied in the experiment.首先实验研究了收集口喉部间隙及其大小对汽车风洞低频颤振的影响,结果表明:在一定的间隙下低频颤振最小。
2.Sound natural frequency of wind tunnel tube plays a key role in researching the buffeting phenomenon of low speed automotive wind tunnel.风洞管道声学固有频率的确定是研究低速汽车风洞低频颤振现象的关键。
3.Based on a 1/15 model wind tunnel of the Shanghai Automotive Wind Tunnel Center,an experimental study is made of the buffeting phenomenon of open-jet wind tunnel on the basis of three limiting configurations in charge of the vortex of nozzle(source of noise),feedback of collector and the structure of plenum,respectively.通过上海地面交通工具风洞中心的1/15模型风洞,按破坏喷口涡流(噪声源)、收集口反馈以及驻室结构三种极限状况,对风洞中的低频颤振现象开展试验研究。
英文短句/例句
1.Buffeting Phenomenon of Open-jet Automotive Aero-acoustic Wind Tunnel开口式汽车气动声学风洞的低频颤振现象
2.Method of Time Frequence Syntony for Flutter Boundary Prediction颤振边界预测的时频共振方法研究
3.Frequency design of dynamic vibration absorbers for flutter suppression of a sandwich panel吸振夹层壁板颤振抑制的吸振器频率设计
4.Study on Three-Dimensional Flutter Analysis in Frequency-Domain of Suspension Bridges and Their Flutter Stability When Erection;悬索桥的三维颤振频域分析及其施工阶段颤振稳定性研究
5.electromechanical low-frequency control oscillator机电低频控制振荡器
6.lower hybrid resonance heating低频带混成共振加热
7.Time-Frequency Domain Filtering and It s Application for Signal Processing of Flutter Tests;时频域滤波方法及其在颤振信号处理中的应用
8.Flutter Prediction Based on Multiplicative Perturbation to Dynamic Pressure采用乘性速压摄动的频域颤振预测方法
9.On the continuity of frequency domain μ analysis and complex perturbation method for flutter solution频域颤振μ分析的连续性及复摄动方法研究
10.Wavelet identification of flight flutter modal parameters under sweep excitation扫频激励下的飞机颤振模态参数小波辨识研究
11.Filtering in Time-Frequency Domain for Measurement of Accelerometer in Flight Flutter Testing颤振试验中加速度计信号的时频滤波方法研究
12.Front-wheel shimmy (low speed ) . Low-speed shimmy is the rapid oscillation of the wheel on the Ball joints.前轮摆振(低速时):低速摆振是球头节上车轮急速颤动所至。
13.WIB for Mitigation Analysis of Subway-Induced Low-Frequency VibrationWIB用于地铁引发低频振动的减振分析
14.The Longitudinal Distribution of Atmospheric Low-frequency Oscillations in Middle-High Latitude and the Impacts Affected by ENSO Events;中高纬低频振荡的经向分布特征及ENSO事件对低频振荡的影响
15.Adaptive Time-Frequency Analysis and It s Application to Signal Processing of Flutter Test;自适应时频分析及其在颤振信号处理中的应用研究
16.The frequency of fundamental resonance decreased with increaseof G levels of vibration.动物共振频率随着振动G值的增加而降低。
17.The Simulation Study on Damping the Low Frequency Oscillation and SSR with TCSC;TCSC抑制系统低频振荡与次同步谐振的仿真研究
18.Mechanism Analysis of Resonance-type Low-frequency Oscillation Caused by Networks Side Disturbance电网侧扰动引起共振型低频振荡的机制分析
相关短句/例句
low-speed flutter低速颤振
1.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。
3)Multi-frequency chatter多频颤振
4)chatter frequency颤振频率
1.This paper probes into the influence of the nonlinearity of contact stiffnessbetween grinding wheel and workpiece on the chatter frequency of workpiece.探讨了砂轮与工件接触刚度非线性对工件颤振频率的影响。
5)multiple-frequency machining chatter多频切削颤振
6)depressing low-frequency vibration低频减振
1.Floating raft system has a huge disadvantage in depressing low-frequency vibration, which is the main problem of submarine’s hiding.浮筏在低频减振方面存在较大不足,而这恰是主动减振的优势。
延伸阅读
颤振颤振flutter弹性结构在均匀气（或液）流中受到空气（或液体)动力、弹性力和惯性力的耦合作用而发生的大幅度振动。它可使飞行器结构破坏，建筑物和桥梁倒塌。发生颤振的必要条件是：结构上的瞬时流体动力与弹性位移之间有相位差，因而使振动的结构有可能从气（或液）流中吸取能量而扩大振幅。最常见的颤振发生在机翼上。当机翼受扰动向上偏离平衡位置后，弹性恢复力使它向下方平衡位置运动，同时产生作用于机翼重心的向上惯性力，因机翼重心在扭心之后，惯性力产生对扭心的力矩而使机翼迎角减小，引起向下的附加气动力，加快机翼向下运动；当机翼运动到下方极限位置而返回向上运动后，出现相反的情况。整个过程中，空气动力是激振力，与飞行速度的二次方成正比；同时还有空气对机翼的阻尼力，与飞行速度成正比。低速时，阻尼力占优势，扰动后的振动逐渐消失，平衡位置是稳定的。当飞行速度超过颤振临界速度后，激振力占优势，平衡位置失稳，产生大幅度振动，导致机翼在很短时间内破坏。防止机翼颤振的最有效方法是使机翼重心前移以减小惯性力矩。设计飞机时，要在风洞中进行模型试验以确定颤振临界速度。飞机研制成功后，还需进行飞行颤振试验。
