發(fā)布時(shí)間：2018-01-20 23:18

  本文關(guān)鍵詞： 直升機(jī) 滑跑 模態(tài)頻率 平衡 起落架　出處：《南京航空航天大學(xué)學(xué)報(bào)》2016年04期 　論文類型：期刊論文

【摘要】：建立了直升機(jī)滑跑時(shí)機(jī)體側(cè)向模態(tài)頻率的計(jì)算模型,用停機(jī)狀態(tài)的試驗(yàn)數(shù)據(jù)對(duì)理論模型進(jìn)行了驗(yàn)證,誤差在10%以內(nèi)。不大的總距操縱可建立起直升機(jī)的穩(wěn)定滑跑,而起落架機(jī)輪側(cè)向剛度隨滑跑速度的增加而降低,這是導(dǎo)致機(jī)體側(cè)向二階模態(tài)頻率隨滑跑速度降低的主要原因。特別在低速滑跑階段,機(jī)體側(cè)向二階模態(tài)頻率隨滑跑速度的提高而迅速下降,與停機(jī)狀態(tài)相比,滑跑速度在35km/h時(shí)機(jī)體模態(tài)頻率的降幅高達(dá)47.6%。
[Abstract]:The calculation model of the lateral modal frequency of the helicopter is established, and the theoretical model is verified by the test data of the downtime state. The error is less than 10%. The stable taxiing of the helicopter can be established with the small total distance control, while the lateral stiffness of the landing gear wheel decreases with the increase of the speed of the taxiing. This is the main reason why the lateral second-order mode frequency of the airframe decreases with the speed of running, especially in the stage of low-speed gliding, the second-order mode frequency of the airframe decreases rapidly with the increase of the speed of gliding, compared with the state of stopping. When the running speed is 35 km / h, the decrease of the body modal frequency is as high as 47.6.
【作者單位】： 海軍航空工程學(xué)院飛行器工程系;
【基金】：航空科學(xué)基金(20145784010)資助項(xiàng)目
【分類號(hào)】：V275.1
【正文快照】： 引用格式:胡國才,魏鋼,吳靖.滑跑速度對(duì)直升機(jī)側(cè)向模態(tài)頻率的影響[J].南京航空航天大學(xué)學(xué)報(bào),2016,48(4):516-521.Hu Guocai,Wei Gang,Wu Jing.Effect of running velocity on helicopter lateral mode frequency[J].Journal ofNanjing University of AeronauticsAstronautics，

本文編號(hào)：1449729