SNAP LOADING OF MARINE CABLE SYSTEMS

作     者：NIEDZWECKI, JM THAMPI, SK 

作者机构：Department of Civil Engineering Ocean Engineering Program Texas A&M University College Station TX 77843-3136 USA GE/Houston 1050 Bay Area Boulevard Houston TX 77058 USA 

出 版 物：《APPLIED OCEAN RESEARCH》 (应用海洋研究)

年 卷 期：1991年第13卷第1期

页      面：2-11页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 0824[工学-船舶与海洋工程] 

主　　题：MARINE CABLES DYNAMICS RESPONSE MODEL TESTS OFFSHORE ENGINEERING MARINE CABLE SYSTEMS SNAP LOADING 

摘      要：This study presents a general two-part analysis procedure for the investigation of snap load behavior of marine cable systems in regular seas. A simple dynamic model of a package suspended from a multi-cable configuration is presented. It is used as the basis to develop dimensionless curves which are useful for the preliminary assessment of the susceptibility of a design to snap load behavior. For cases where this model indicates a strong possibility of snap load behavior, the designer must use a more complex dynamic model. A deepwater marine cable system, similar to that designed for scientific coring studies of the Mid-Atlantic Ridge, is used as the basis for the illustrative examples. The packages to be placed on the seafloor had complicated geometrical shapes with openings through which fluid could pass. Experiments to determine the hydrodynamic added-mass were performed and the results compared to common hydrodynamic approximations. The numerical examples illustrate the sensitivity of these dynamic response predictions to hydrodynamic approximations, ship heading and design wave conditions. They also show that it may be possible to avoid snap loading through proper design, and that if snap loading occurs it is possible to mitigate its effects without complete failure of the system.