Research on Launch Dynamics in Roads with Underground Cavity Defects

WANG Xianheng; JIANG Yi; YANG Lina

doi:10.15892/j.cnki.djzdxb.2025.02.004

Journal of Projectiles, Rockets, Missiles and Guidance >

2025 , Vol. 45 >Issue 2: 150 - 158

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2025.02.004

Research on Launch Dynamics in Roads with Underground Cavity Defects

WANG Xianheng ,
JIANG Yi ,
YANG Lina

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School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China

Received date: 2025-02-27

Online published: 2025-05-15

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Abstract

In view of the fact that the existing research has not systematically revealed the scientific issue of the dynamic response of the unanchored launch system to road damage, this study based on the dynamic model of the underground cavity-damaged road and the unanchored mobile launch system, analyzes the influence of the spatial distribution of cavities on the coupled system. The results show that the cavity damage causes the road to undergo brittle fracture, and the maximum deflection of the road increases by 23.5%. However, the initial disturbance of the missile decreases by 21.5% due to the road damage. When the cavity shifts longitudinally, the maximum deflection of the road first increases by 3.36% and then gradually decreases. When the cavity shifts towards the rear of the vehicle, the initial disturbance of the missile first increases by 42.1% and then gradually decreases. When the cavity shifts towards the front of the vehicle, the initial disturbance of the missile monotonically decreases by 28.95%. When the cavity shifts laterally, the maximum deflection of the road first increases by 14.33% and then decreases by 22.76%, and the yaw rate of the missile increases from 0.001°/s to -0.091°/s and then decreases to -0.049°/s. The depth parameter of the cavity has a relatively small influence on the coupled system. With the increase in the size of the cavity, the maximum deflection of the road increases by 47.65%, while the initial disturbance of the missile first decreases by 21.8% and then gradually increases due to the road damage.

Key words： underground cavity defects; non-supported launch; road bearing capacity; initial disturbance

Cite this article

WANG Xianheng , JIANG Yi , YANG Lina . Research on Launch Dynamics in Roads with Underground Cavity Defects[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2025 , 45(2) : 150 -158 . DOI: 10.15892/j.cnki.djzdxb.2025.02.004

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