Model experimental study on slamming load of high-speed crafts in waves

High-speed crafts are mostly planing boats. When a high-speed craft is sailing at a high speed in waves, the slamming loads, motion and responses have very complex strong nonlinear characteristics. At present, except the model test method, there is no effective numerical method to evaluate the slamming load and response of a high-speed craft. In this paper, the model test of a high-speed craft was carried out to study the slamming load and response characteristics of the high-speed boat in waves. The main scales and wave conditions of the model were determined according to the similarity theory and the parameters of the tank, the structure scheme of the model according to the test purpose while the layout of the parameter measurement points of the model and the final test scheme of the high-speed craft model were finalized. Through experiments a series of test data such as slamming pressure, acceleration and midship bending moment of the high-speed craft model sailing at high speed under wave conditions were obtained, followed by statistical analysis of the relevant data. By studying the influence of the parameters of speed, wave height and wave length on the slamming load and structural response of the high-speed craft, the variation law of pressure peak along the ship length and the slamming load and response characteristics of the high-speed craft under wave conditions were obtained. The study is of great significance in guiding the design and development of high-speed crafts. © 2023 China Ship Scientific Research Center. All rights reserved.