The invention belongs to the technical field of rotor noise tests of rotor aircrafts, and particularly relates to an inter-hovering model rotor rotation noise measuring point validity judgment method. The judgment method comprises the following steps: calculating to obtain an arc-shaped bracket placement reference distance according to a rotor wing through frequency and sound velocity, placing arc-shaped brackets at a plurality of different reference distances at the same azimuth angle, and respectively carrying out horn sounding and noise collection at 1-20 times of reference frequency on measuring points on the same azimuth and the same included angle path; according to the method, sound attenuation characteristic analysis of the total sound pressure level on the same direction and the same included angle path is carried out, and a judgment result about whether the noise measuring point is effective is given out. The method is closer to the characteristics that the rotor noise is mainly based on 1-20 times of passing frequency components and the rotor noise at different distances has obvious attenuation characteristics; the judgment method provided by the invention has better actual use effect and engineering value.
本发明属旋翼飞行器旋翼噪声试验技术领域,特别涉及一种悬停间模型旋翼旋转噪声测点有效性判断方法;所述判断方法根据旋翼通过频率和声速计算得到弧形支架摆放基准距离、在相同方位角多个不同基准距离摆放弧形支架、对相同方位及相同夹角路径上测点分别进行1~20倍基准频率的喇叭发声和噪声采集、进行相同方位及相同夹角路径上总声压级的声衰减特性分析、给出噪声测点是否有效的判断结果,该方法更贴近旋翼噪声以1~20倍通过频率成分为主以及不同距离的旋翼噪声具有明显衰减特性的特点,本发明所提出的判断方法具有更好的实际使用效果和工程价值。
Inter-hovering model rotor rotation noise measurement point validity judgment method
一种悬停间模型旋翼旋转噪声测点有效性判断方法
2023-08-08
Patent
Elektronische Ressource
Chinesisch
IPC: | B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen |
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