船身式水陆两栖飞机起降飞行仿真研究

水陆两栖飞机地面和水面起降特性需要满足适航规章的要求,有必要在飞机方案的优化设计过程中建立准确的计算分析方法来开展评估,以保证飞机方案的适航符合性、降低设计更改风险。基于滑行艇水面滑行水动力分析方法、地面起落架多体动力学建模方法及 Matlab / Simulink 仿真环境,分别建立某船身式水陆两栖飞机水面、地面起降的飞行仿真模型,数学模型中包含飞机本体飞行力学模型、水动力模型或起落架模型,通过对算例飞机水面和地面起飞过程开展飞行仿真,得到飞机各运动状态变量、起落架参数、水动力等的时间历程,并与飞行试验、水池试验数据进行对比分析。结果表明:所建立的船身式水陆两栖飞机地面、水面飞行仿真方法达到了型号设计的精度要求,仿真结果与试验试飞结果吻合得较好。

Take-off and landing flight simulation of amphibious aircraft

For amphibians aircraft, Ground and water handling characteristics should meet the requirements of airworthiness regulations, and an accurate computation analysis method should be established to carry out the evaluation during the optimization design process of the aircraft scheme, so as to ensure the airworthiness compliance of the aircraft scheme and reduce the risk of design change. Based on the planing boats hydrodynamic analyzing methods, landing gear system multibody dynamic modeling technology and Matlab/Simulink simulation environment, a mathematical flight simulation model of flying boat in water was built, as well as another simulation model on the ground. The time history of various motion state variables, undercarriage parameters, hydrodynamic forces of the aircraft are obtained after the simulation. Finally, a contrastive analysis of the taking-off process between the simulation results and expremental data was made. The results showed that the ground and water flight simulation method was consistent with test data of the amphibious aircraft, can achieve the accuracy requirement of aircraft type design. This method has an important theoretical and practical value in evaluating and improving the aircraft designed, as well as in guiding the airworthiness compliance flight test.