滑跑速度对直升机侧向模态频率的影响

发布时间：2018-01-20 23:18

  本文关键词： 直升机 滑跑 模态频率 平衡 起落架　出处：《南京航空航天大学学报》2016年04期 　论文类型：期刊论文

【摘要】：建立了直升机滑跑时机体侧向模态频率的计算模型,用停机状态的试验数据对理论模型进行了验证,误差在10%以内。不大的总距操纵可建立起直升机的稳定滑跑,而起落架机轮侧向刚度随滑跑速度的增加而降低,这是导致机体侧向二阶模态频率随滑跑速度降低的主要原因。特别在低速滑跑阶段,机体侧向二阶模态频率随滑跑速度的提高而迅速下降,与停机状态相比,滑跑速度在35km/h时机体模态频率的降幅高达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.
【作者单位】： 海军航空工程学院飞行器工程系;
【基金】：航空科学基金(20145784010)资助项目
【分类号】：V275.1
【正文快照】： 引用格式:胡国才,魏钢,吴靖.滑跑速度对直升机侧向模态频率的影响[J].南京航空航天大学学报,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，

本文编号：1449729