带应急气囊直升机水上漂浮稳性研究

Research on Stability of Helicopter with Emergency Floatation Bags

为了研究带应急气囊直升机完整和破损情况下水上漂浮的横向稳定性,首先通过等排水量理论计算方法分析带应急气囊完整直升机的横向静稳定性和动稳定性,并研究了直升机重心不同位置对稳定性的影响,得出了重心处于后限、重心离水面越近时,直升机具有更好稳定性的结论;其次,在直升机破损情况下,建立直升机与破损舱室的模型,得出了破损直升机的漂浮稳性;最后通过其破损条件,对破损直升机漂浮时间进行了分析。

In order to study the lateral stability of the helicopter with emergency floatation bags,the movement after damping and the attitude of floating. Firstly,analyzing lateral static stability and dynamic stability of the helicopter with floatation bags through the calculation of the equal discharge of water theoretical method,and studied the influence of the different position of the center of gravity of the helicopter for stability,it was concluded that when the aft center of gravity on limit position,the center of gravity is closer to the water surface,the helicopter has better stability. In helicopter damaged cases,the establishment of a helicopter with damaged compartment model,obtained the broken helicopter floating stability; finally through the damaged condition and the damaged helicopter floating time are analyzed.