The invention belongs to the technical field of structural strength design of helicopters, and discloses a wheel type undercarriage helicopter landing/ship-borne load calculation method which comprises the following steps: S1, acquiring loads of an undercarriage in a resistance-free landing/ship state, the loads of the undercarriage including a course load, a vertical load and a lateral load; S2,acquiring a rolling friction coefficient and a sliding friction coefficient of the take-off and landing surface of the helicopter; and S3, determining the state of the helicopter during landing/warship, and determining the load of the undercarriage corresponding to the state of the helicopter obstacle during resistive landing/warship in combination with the load of the undercarriage in the resistance-free landing/warship state and the rolling friction coefficient and the sliding friction coefficient of the take-off and landing surface of the helicopter. According to the method, the landing/warship state of the wheeled undercarriage helicopter is comprehensively considered, the load under the influence of external factors such as the unevenness of the landing surface is obtained, and meanwhile, the time proportion of the load in the landing/warship spectrum is determined to serve as the basis for designing the static strength and fatigue strength of the undercarriage and the connectingstructure.
本发明属于直升机结构强度设计技术领域,公开了一种轮式起落架直升机着陆/舰载荷计算方法,所述方法包括:S1,获取无阻力着陆/舰状态下起落架的载荷,所述起落架的载荷包含航向载荷、垂向载荷、侧向载荷;S2,获取直升机起降面的滚动摩擦系数和滑动摩擦系数;S3,确定直升机着陆/舰时的状态,结合无阻力着陆/舰状态下起落架的载荷,以及直升机起降面的滚动摩擦系数和滑动摩擦系数,确定直升机障碍有阻力着陆/舰时的状态对应的起落架载荷。以全面考虑轮式起落架直升机的着陆/舰状态,获得由于起降面不平度等外部因素影响下的载荷,同时确定该载荷在着陆/舰谱中的时间比例,以此作为起落架及连接结构静强度及疲劳强度设计的依据。
Wheel type undercarriage helicopter landing/ship-borne load calculation method
一种轮式起落架直升机着陆/舰载荷计算方法
2021-01-05
Patent
Electronic Resource
Chinese
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 |
Undercarriage facilitating stable landing of unmanned helicopter
European Patent Office | 2022
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