Research On Counter-Flooding Decision Aid System Onboard Warship

In modern warfare, the possibility of flooding of the warships increased with the development of modern weapon onboard (torpedo and bomb, etc). When a flooding emergency occurs, stability could get worse, even sink due to reserve buoyancy loss and stability deficiency, which would be a direct menace to warship's survivability. At the same time, survivability of warship is not a specific characteristic under the condition of warfare, it is possible for warship to sink due to flooding and fire caused by various navigation incident at peacetime. Therefore, how to maintain the survivability and deal with various kinds of damage effectively turns out be an urgent problem, which requires the decision maker to generate immediate response according to the damaged condition. However, the traditional decision process to the damage, is well recognized that such decisions may not be enough under certain emergency situations. So the perfect counter-flooding decision aid system helps to maintain and improve the survivability as much as possible, on the other hand, the investigation on counter-flooding decision aid is vital important to warship's survivability.Therefore, as the initial research on counter-flooding decision aid, this paper focuses on the following aspects:(1) Real-time calculation method is investigated about floating condition, initial metacentric height, as well as stability at large inclining angle and anti-wind capability, which focuses on the real-time calculation of damaged loading condition, minimal initial metacentric height, reserve buoyancy and development of floodability calculation system.(2) The counter-flooding decision aid system, which is mainly composed of a model base, a database, a knowledge base and man-machine interaction sub-system, is developed. Also, the counter-flooding measures which are required are discussed separately according to the initial metacentric height value. This paper researches on the counter-flooding scheme of unsymmetrical flooding in the state of negative initial metacentric height, as well as the scheme generated automatically in accordance with positive initial metacentric height is mainly investigated.(3) A new method is discussed, which is able to offer the reasonable scheme to right warship and restore stability automatically by means of counter-flooding tanks. To realize it, the counter-flooding scheme optimization model is established, the penalty function of nonlinear programming method (NLP) and improved genetic algorithm are introduced to solve the model to obtain the optimal scheme. (4) This paper presents an effective and rapid method to generate the counter-flooding scheme, which relies on certain data and is applicable to conduct real-time calculation, is also realized by programming.This research helps to aid the decision maker in effective damage control decision and rapid emergency response.