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采用以边界元法为基础的数值模拟仿真技术,在停航、各种航行航速状态和防腐蚀涂层几种典型损伤状态下,仿真计算铝合金船体表面保护电位分布、保护电流密度分布以及牺牲阳极消耗速度,确定牺牲阳极的有效极限体积,达到在停航及各种航行航速状态下,使船体全部表面上保护电位值处于有效范围内,从而确立船体的最优牺牲阳极保护方案。两年实际使用情况表明,边界元数值模拟仿真技术用于船舶阴极保护系统优化是一种有效的、先进的方法。
Using the numerical simulation technique based on the boundary element method, the surface protection potential distribution, the protection current density distribution and the sacrificial anode of the aluminum alloy hull are simulated and calculated under several typical damage states, such as parking, various sailing speeds and anticorrosive coatings. The rate of consumption and the effective limit volume of the sacrificial anode are determined so that the protection potential value on the entire surface of the hull is within the valid range under the condition of suspension and various sailing speeds so as to establish the optimal sacrificial anode protection scheme of the hull. The actual use for two years shows that it is an effective and advanced method for the optimization of the cathodic protection system of the ship by using the boundary element numerical simulation technology.