The Influence of Different Factors on the Dynamic Anti-sinking Capacity of Submarines

摘要

In this paper, a complete mathematic model of submarines' emergencyrnsurfacing is built based on the non-linear motion equations of sixrndegrees of freedom, which includes the damage flooding, high-pressurernblowing-venting of ballast tank, surfacing with a large angle of attack,rnPID auto-steering. Using the mathematic model, a submarinernemergency surfacing simulation code is programmed. Furthermore, arncertain submarine's surfacing motions under different locations andrnmagnitudes of damage, initial speed, and blowing-venting conditionsrnare calculated. Through analysis of the simulation results:rnThe pattern of depth and attitude changing during the emergencyrnsurfacing is obtained, and the effectiveness on anti-sinking of highpressurernblowing-venting, accelerating, and steering is also validated.rnThe changing pattern of the critical diameter for retrieval is analyzed asrnan indicator of the dynamic anti-sinking capacity of submarines.