On the Effects of Ship Rolling Motions on Missile Vertical Ejection

doi:10.12382/bgxb.2025.0453

Abstract

Abstract:

In order to master the influence law of ship rolling motion on the parameters of missile vertical ejection barrel under high sea states，a dynamic vertical launching model based on launcher，launch canister and missile coupling system is built.The flexible deformation of launcher and launch canister，as well as the movement transfer relationship among launcher，launch tube and missile are considered in the model.The correctness of the model is verified by comparing the dynamic simulation data and actual test data of vertical ejection process of a ship-borne missile.The changes in vertical ejection parameters of missiles caused by the changes in ship rolling motion parameters under high sea states are simulated and analyzed based on this model.The analysis results show that the pitch angle and pitch angular velocity of missile exhibit a linear increasing trend with the increases in ship roll angle and angular velocity amplitude.The effects of ship roll angle and angular velocity on the roll angular velocity of missile exhibits randomness，The roll angular velocity of the missile as it exits the tube changes drastically when ship roll angle is -14°or ship angular velocity is 11.2°/s.

Key words: launch dynamics, finite element method, ship rolling motion, high sea state, vertical ejection

WANG Shuman, JIANG Yi, JIANG Baichen, LI Ying, HU Binglun. On the Effects of Ship Rolling Motions on Missile Vertical Ejection[J]. Acta Armamentarii, 2025, 46(S1): 250453-.

Figures/Tables 12

Fig.1 The definition of coordinate system

Fig.2 Dynamic vertical ejection model

Fig.3 The FEM model of launcher

Fig.4 The FEM model of launch canister

Fig.5 The FEM model of adapter

Tab.1 Ship swing motions under fifth level sea state

运动参数	幅值
φ/（°）	-18~18
Ω/（（°）·s^-1）	-14~14

Fig.6 Loading method of ejection power

Fig.7 Curve of ejection thrust

Tab.2 Loading condition of ship swing motions

运动参数	幅值
φ/（°）	2
Ω/（（°）·s^-1）	1.4

Tab.3 Comparison of simulated and test results

出筒参数	试验结果	仿真结果有限元	误差
t/s	0.32	0.34	5%
v/（m·s^-1）	28.79	26.49	-8%
θ_z/（°）	-2.17	-2.34	-8%
θ_y/（°）	0.018	0.019	4%
θ_z/（°）	-0.14	-0.15	-7%
ω_z/（°）	0.54	0.53	-2%
ω_y/（°）	0.75	0.68	-9%
ω_x/（°）	-1.51	-1.42	6%

Fig.8 Effect of ship rolling angle on ejection parameters

Fig.9 Effects of rolling angular velocity of the ship on ejection parameters

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