Accession Number : AD0473283


Title :   EXPERIMENTAL INVESTIGATION OF HYDRODYNAMIC IMPACT ON INFLATABLE FABRIC SHIP SECTIONS.


Descriptive Note : Final rept. Sep 64-Jun 65,


Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON DC STRUCTURAL MECHANICS LAB


Personal Author(s) : Chuang, Sheng L


Report Date : Oct 1965


Pagination or Media Count : 37


Abstract : This report presents the experimental results of an impact study on two inflatable models which represent a 1-to-20 scaled Mariner ship section. Airmat, a form of inflatable fabric, was used for the two models. Pressures, velocities, accelerations, and deflections were measured, and the piled-up water phenomenon was obtained photographically. Comparison of experimental results between a rigid model and the inflatable models shows that at the instant of impact the keel pressure for the inflatable model is considerably less than it is for the rigid model. Keel pressure was chosen as a comparison since maximum pressure usually occurs at that location. Unfortunately, some air leaks existed in both models, and attempts to stop the air leakage from the pressurized models failed. It is difficult at this time to determine whether this air leakage was due to poor workmanship or to the nature of the inflatable material. Before Airmat can be installed on a ship to aid in reducing slamming pressures, the question of the origin of the air leakage must be resolved. (Author)


Descriptors :   *SHIP HULLS , IMPACT SHOCK , IMPACT SHOCK , TEXTILES , SHIP MODELS , FAILURE(MECHANICS) , HYDRODYNAMIC CHARACTERISTICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE