Addressing Military Surviyability and Safety Aspects in Classification of Naval Design

摘要

It has become standard operating procedure for Classification Societies to provide services for naval ship designs around the world. This paper will briefly discuss the factors leading to this eventuality and describe some of the military survivability aspects of naval design currently being addressed by societies. Using the ABS International Naval Ship Guide (INSG) notations and NATO standard ANEP 77 as examples, the paper will describe some aspects of survivability that classification now addresses. Topics will include: NATO ANEP 77: The Naval Ship Code is intended to address naval surface ship safety. It is a goal-based standard using IMO conventions and other sources as introduced through the International Naval Safety Association (INSA). Hull Girder Ultimate Strength Assessment: Discusses the critical failure modes of all hull girder structural elements. All relevant failure modes for individual structural elements, such as plate buckling, torsional stiffener buckling, stiffener web buckling, lateral or global stiffener buckling, and their interactions are considered in identifying the weakest inter-frame failure mode. Ballistic and Fragmentary Protection: From basic to enhanced levels of protection, this notation addresses ship arrangement details aimed at concealing crew and mission critical assets to protect from attack. Methods to slow ballistic projectiles and protect from structural penetration are used for higher notation levels. Air Blast: Addresses the calculation of air blast loads and methodology for analyzing structure, using explosive amount and distance from blast to determine protection level desired. Underwater Shock: Describes the assessment of a structure to withstand an underwater explosion. Underway Replenishment: Addresses the general guidance to identify the fitness of principal equipment and the completeness of a ship's operational manual in order to perform Underway Replenishment safely. Redundancy: Notations addressing redundancy arrangements, indicating a vessel is fitted with multiple propulsors and steering systems such that fire or flood in one space will not affect other propulsion systems. Finally, the paper will consider evolving technologies being considered for naval designs that will need to be addressed by class societies in the future. KEY WORDS: