Impact Dynamics of Supercavitating Projectile with Fluid/Structure Interaction
Qian-Kun He, Ying-Jie Wei, Cong Wang, Jia-Zhong Zhang
School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
Abstract:
As supercavitating projectiles move at high speed, the periodic impacts (“tail-slap”) on the interior surface of the cavity generally occur due to disturbances. The interactions between the projectile and the water/cavity interface are the sources of structural vibrations, which affect the guidance of the vehicle and undermine the structural reliability. The Fluid/Structure Interaction calculation procedure of the tail-slaps of supercavitating projectile is established, and the dynamic behaviours of the projectile operating in tail-slap conditions with and without considering Fluid/Structure Interaction are obtained and compared. The responses of the projectile riding a reducing cavity are studied, and the effect of Fluid/Structure Interaction is also analyzed. The results show that the angular velocity of projectile increases as the body slowing down, and the amplitude of the elastic displacement response decreases at the beginning and increases when the cavity size is close to the diameter of the tail of projectile. The effect of Fluid/Structure Interaction reduces the amplitudes and frequencies of the impact loads and the vibration responses of the body, and when the speed is higher, the effect is more apparent.
Key words: supercavitating projectile tail-slap fluid/structure interaction dynamic response finite element method
DOI：10.11916/j.issn.1005-9113.2013.01.019
Clc Number:O327; O353
Fund:
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Impact Dynamics of Supercavitating Projectile with Fluid/Structure Interaction
本站小编 哈尔滨工业大学/2019-10-24
相关话题/Impact Dynamics Supercavitating Projectile Fluid
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