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Research on the Launching Dynamics of Vehicle-mounted Missile Based on Following-up and Time-varying Wind Load
JIAO Tianhang, JIANG Yi, WANG Deng, YAN Song
JPRMG ›› 2023, Vol. 43 ›› Issue (1) : 54-62.
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Research on the Launching Dynamics of Vehicle-mounted Missile Based on Following-up and Time-varying Wind Load
({{custom_author.role_en}}), {{javascript:window.custom_author_en_index++;}}In order to investigate the launch response characteristics of vehicle-mounted missile weapon system under following-up and time-varying wind load, a finite element simulation model of vehicle-mounted missile weapon system was established in ABAQUS based on dynamics principle and finite element method, and the ABAQUS user subroutine was innovatively used for joint secondary development to realize the real-time loading of the following-up wind load. The influence of wind force on missile attitude and the vibration of launcher are analyzed under different wind speed, eccentric thrust angle and ground angle. The results show that the wind load not only has a great influence on the attitude of the missile out of the barrel and the vibration of the launch barrel, but also promotes or hinders the launch accuracy deviation caused by the eccentric thrust Angle and the inclination of the ground.
following-up / time-varying / wind load / vehicle mounted missile launch system / ABAQUS user subroutine {{custom_keyword}} /
Table 1 Parameters of model materials表1 模型材料参数表 |
| Components | Material | Density/ (kg/m3) | Elastic modulus/Pa | Poisson’s ratio |
|---|---|---|---|---|
| Frame and legs | Q235steel | 7.8×103 | 2.1×1011 | 0.30 |
| Launcher and missile | Aluminium | 2.7×103 | 7.1×1010 | 0.33 |
| Adapter | Polytene | 1.2×103 | 9.03×108 | 0.39 |
Table 2 Pitch angular displacements and pitch angular velocities at the moment of departure from the cylinder under different wind speeds表2 不同风速下离筒时刻俯仰角位移与俯仰角速度 |
| Wind speed/ (m/s) | Pitch angular displacement/(°) | Pitch angular velocity/((°)/s) |
|---|---|---|
| 0 | -0.004 96 | -0.064 73 |
| 15 | -0.025 12 | -0.261 18 |
| 17.5 | -0.032 68 | -0.336 59 |
| 20 | -0.041 56 | -0.426 27 |
| 22.5 | -0.051 71 | -0.528 58 |
| 25 | -0.063 21 | -0.644 00 |
Fig.15 Pitch angular displacement and pitch angular velocity of missile centroid under different engine thrust eccentricity angles图15 不同δ下导弹质心俯仰角位移与俯仰角速度 |
Table 3 Pitch angular displacements and pitch angular velocities at the moment of departure from the cylinder under different engine thrust eccentricity angles表3 不同δ下离筒时刻俯仰角位移与俯仰角速度 |
| Engine thrust eccentricity angle/(°) | Pitch angular displacement/(°) | Pitch angular velocity/((°)/s) |
|---|---|---|
| -0.2 | 0.026 59 | 0.998 01 |
| -0.1 | 0.010 38 | 0.248 38 |
| 0 | -0.041 56 | -0.426 27 |
| 0.1 | -0.077 30 | -1.150 34 |
| 0.2 | -0.116 68 | -1.937 60 |
Fig.19 Pitch angular displacement and pitch angular velocity of missile centroid under different ground inclination angles图19 不同地面倾角下导弹质心俯仰角位移与俯仰角速度 |
Table 4 Pitch angular displacement and pitch angular velocity at the moment of departure from the cylinder under different ground inclination angles表4 不同γ下离筒时刻俯仰角位移与俯仰角速度 |
| Ground inclination angle/(°) | Pitch angular displacement/(°) | Pitch angular velocity/((°)/s) |
|---|---|---|
| -2 | -0.168 45 | -1.389 55 |
| -1 | -0.103 10 | -0.914 69 |
| 0 | -0.041 56 | -0.426 27 |
| 1 | 0.011 80 | -0.019 62 |
| 2 | 0.140 72 | 0.850 50 |
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Fig.1 Schematic diagram of vehicle mounted missile launch system modelFig.2 Schematic diagram of adapter layout and grid divisionFig.3 Schematic diagram of the connection relation between some flexible bodies and grid division
Table 1 Parameters of model materialsFig.4 Schematic diagram of the process of wind load on missile ejectionFig.5 Schematic diagram of wind load time-varying loading process realized by subroutineFig.6 Missile thrust curveFig.7 Schematic diagram of missile launching processFig.8 Schematic diagram of the wind load directionFig.9 x direction displacement of missile head, centroid and tail under different wind speedsFig.10 Schematic diagram of lever movement during missile ejectionFig.11 Pitch angular displacement and pitch angular velocity of missile centroid under different wind speedsTable 2 Pitch angular displacements and pitch angular velocities at the moment of departure from the cylinder under different wind speedsFig.12 Displacement of missile launch canister under different wind speedsFig.13 Schematic diagram of the engine thrust eccentricity angleFig.14 x-direction displacement of missile head, centroid and tail under different engine thrust eccentricity anglesFig.15 Pitch angular displacement and pitch angular velocity of missile centroid under different engine thrust eccentricity anglesTable 3 Pitch angular displacements and pitch angular velocities at the moment of departure from the cylinder under different engine thrust eccentricity anglesFig.16 Displacement of missile launch canister under different engine thrust eccentricity anglesFig.17 Schematic diagram of the ground inclination angleFig.18 x-direction displacement of missile head, centroid and tail under different ground inclination anglesFig.19 Pitch angular displacement and pitch angular velocity of missile centroid under different ground inclination anglesTable 4 Pitch angular displacement and pitch angular velocity at the moment of departure from the cylinder under different ground inclination anglesFig.20 Displacement of missile launch canister under different ground inclination angles/
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