电化学极化状态对潜艇螺旋桨扰动电场模型的影响

潜艇服役期间涂层性能退变影响潜艇电场分布，以材料电化学极化状态为边界条件，应用边界元法建立潜艇涂层性能下降、涂层渗透腐蚀、涂层局部破损极化三种潜艇腐蚀静电场模型，从时域和频域特征对螺旋桨扰动电场模型进行分析。研究结果表明：电化学极化状态对螺旋桨扰动电场的电位信号特征及电场谐波频段影响显著。恒电位、线性极化、非线性极化三种边界条件下，螺旋桨以相同频率旋转扰动静电场时，各模型的频率成分占比差异明显。非线性边界条件下的扰动频率和2倍扰动频占比相差最大，线性边界条件下的扰动频率和2倍扰动频占比相差最小。三种边界条件下电场模型的3倍扰动频以上的谐波范围会发生改变，恒电位边界下模型谐波范围最小，非线性边界条件下谐波范围最大。

Influence of electrochemistry polarization state on electric field model of submarine propeller disturbance

The electric field distribution of submarine is affected by the degradation of coating properties during service. With material polarization as boundary condition, three electrostatic field models were established by using boundary element method,including submarine coating performance deterioration, coating penetration corrosion and coating local damage polarization. The propeller disturbance electric field model was analyzed from time domain and frequency domain characteristics. The results show that electrochemical polarization state has a significant effect on the potential and harmonic of propeller disturbance electric field. Under the three boundary conditions of constant potential, linear polarization and nonlinear polarization, when the propeller rotates at the same frequency to disturb the electrostatic field, the proportion of frequency components of each model is significantly different. Under the nonlinear boundary condition, the difference between the disturbance frequency and the ratio of twice disturbance frequency is the largest. Under the linear boundary condition, the difference between the disturbance frequency and the ratio of twice disturbance frequency is the smallest. Under three kinds of boundary conditions, the harmonic range of the electric field model above three times of the disturbance frequency will change. The harmonic range of the electric field model is the smallest under the constant potential boundary condition, and the harmonic range is the largest under the nonlinear boundary condition.