CAJ | 학술논문

为了研究直升机在风切变气流场中的响应特性,基于相关文献,建立了风切变工程化模型.根据旋翼的非均匀入流模型,建立了直升机非线性动力学模型,并利用四阶龙格-库塔法,对某型直升机在风切变场中的飞行特性进行了数值仿真.研究结果表明:样机进入风切变场后,飞行姿态立即出现俯仰震荡、左右摇摆的现象,10 s内,侧倾角的峰值差最大达到了73.14°,直升机下坠的高度为53.19 m,偏航距离为93.79 m.
위료연구직승궤재풍절변기류장중적향응특성,기우상관문헌,건립료풍절변공정화모형.근거선익적비균균입류모형,건립료직승궤비선성동역학모형,병이용사계룡격-고탑법,대모형직승궤재풍절변장중적비행특성진행료수치방진.연구결과표명:양궤진입풍절변장후,비행자태립즉출현부앙진탕、좌우요파적현상,10 s내,측경각적봉치차최대체도료73.14°,직승궤하추적고도위53.19 m,편항거리위93.79 m.
@@@@For the purpose of studing the response of helicopter in wind shear field, the wind shear model was established based on reference. The complete helicopter flight dynamic model was established when considering the non-uniform inflow of main rotor, and Runge-Kutta technique was used to solve the equations. It was found that from the results, the wind shear made the attitude angle shake, which deteriorated the stability of helicop?ter. Especially peak values of the roll angle difference reached to 73.14 degrees. The windshear had greater ef?fect on the helicopter’s track, The results showed that falling distance could be up to 53.19 m and yaw dis?tance could be up to 93.79 m in 10 seconds.