Impact Load Characteristics of Large-Scale Trans-Medium Vehicles during High-Speed Oblique Water Entry

• Published in: 水下无人系统学报 Vol. 32; no. 3; pp. 426 - 433
• Main Authors: Tongyun ZHANG, Cong WANG, Haiyu XU, Weixue XIA, Xiaojian MA, Jing ZHAO
• Format: Journal Article
• Language: Chinese
• Published: Science Press (China) 01.06.2024
• Subjects: impact load; multiphase flow; oblique water entry; trans-media vehicle
• ISSN: 2096-3920
• DOI: 10.11993/j.issn.2096-3920.2024-0021

To investigate the impact load characteristics of large-scale trans-medium vehicles during high-speed oblique water entry, a three-dimensional unsteady numerical calculation model of high-speed oblique water entry of the trans-medium vehicles was established based on the volume of fluid (VOF) multiphase flow model and the S-DOF rigid body motion mode. The calculation accuracy of the numerical calculation model was checked and verified by using the free motion test data of the slender objects during high-speed water entry, and the impact load characteristics of the vehicles with flat heads and conical heads during high-speed oblique water entry were compared. The results show that the occurrence time of the maximum axial and longitudinal impact loads of the vehicle with a conical head is almost synchronous, while the maximum axial impact load of the vehicle with a flat head is significantly delayed compared with the longitudinal load. For the maximum impact load, the axial impact load of the vehicle with a fla