CAJ | 학술논문

文章数值模拟了柔性尾鳍的仿金枪鱼水下机器人从静止加速到稳定巡游的自主游动过程,分析了其运动过程中的运动和水动力性能特点及变化,并与刚性尾鳍模型进行了比较.同时详细分析了尾鳍的运动参数如频率,摆动幅度,横移振幅对仿金枪鱼自主游动过程的影响.结果表明,仿金枪鱼在启动加速时效率较低,柔性变形可以较大地提高仿金枪鱼的推进效率;尾鳍的运动参数对自主游动过程有很大的影响:在一定的范围内,增大尾鳍的运动频率、摆动幅度和横移振幅可以提高运动速度、推力和推进效率,但过大的摆幅会降低推进效率.
문장수치모의료유성미기적방금창어수하궤기인종정지가속도은정순유적자주유동과정,분석료기운동과정중적운동화수동력성능특점급변화,병여강성미기모형진행료비교.동시상세분석료미기적운동삼수여빈솔,파동폭도,횡이진폭대방금창어자주유동과정적영향.결과표명,방금창어재계동가속시효솔교저,유성변형가이교대지제고방금창어적추진효솔;미기적운동삼수대자주유동과정유흔대적영향:재일정적범위내,증대미기적운동빈솔、파동폭도화횡이진폭가이제고운동속도、추력화추진효솔,단과대적파폭회강저추진효솔.
This paper presents a study on a self-propelled swimming tuna-like underwater vehicle with flexible tail fin. The self-propelled tuna accelerates from static condition, and reaches to the stability con-dition at a cruise speed. Both the swimming process and hydrodynamic performance are analyzed, which is also compared with the rigid tail fin model. The influence of the motion parameters of the tail fin on the self-propelled swimming is studied in detail. The results show that the efficiency is low at the beginning, but can be enhanced by flexible deformation considerably. The motion parameters make a crucial influence on the self-propelled swimming. Cruising speed, thrust force and propulsion efficiency could be augmented by increasing the value of motion parameters. However, large swing will reduce the propulsion efficiency.