For the anti-ballistic design of the helicopter tail rotor drive shaft, a numerical simulation of ballistic damage of the helicopter tail rotor drive shaft with different influencing factors has been carried out. Based on the finite element simulation software, a numerical simulation model of the ballistic damage of the tail rotor drive shaft has been established, and the reliability of the model has been verified. Then, based on the verified numerical simulation model, the influences of two typical parameters, offset and incidence angle, on the ballistic damage of the tail rotor drive shaft have been analyzed. The results show that the degree of the ballistic damage of the tail rotor drive shaft increases at first and then decreases with the increase of bullet offset and incidence angle, and the ballistic damage of the tail rotor drive shaft becomes the most serious under the condition of trimming position and with incidence angle of 75°. Besides, the effects of four additional impact parameters, namely, friction coefficient, incidence velocity of the bullet, rotational speed of the drive shaft and yaw angle of the bullet, on the ballistic damage have been further investigated. The results demonstrate that the friction coefficient has less influence on the damage, and the rotational speed of the drive shaft, incidence speed and yaw angle of the bullet have greater influence on the damage.
Key words
helicopter /
tail rotor drive shaft /
ballistic damage /
numerical simulation
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