目的 提出一种简单确定外加电流大小和辅助阳极位置的方法。方法 对阳极的位置进行离散处理，通过Matlab中的脚本程序，控制COMSOL有限元软件的运行，交替地调整电流大小和阳极位置，经过搜索，找到最佳阳极布局和相应的最小输入电流。采用这一方案进行有限元计算。结果 船体表面全部得到了保护，保护率为100%，每个阳极所需电流只有0.057 26 A，最高保护电位为0.84 V左右，过保护现象不严重。结论 提出的方法能够较好地解决外加电流阴极保护设计中遇到的难题，具有简单、易操作的优点，并具有普适性。

The work aims to propose a simple method to determine the impressed current magnitude and position of auxiliary anode. The position of the anode was discretely processed at first. Then, the script program in Matlab was used to control the operation of the finite element software for calculating the optimal anode layout and corresponding minimum input current (COMSOL). The optimal anode layout and the corresponding input current were finally achieved by alternatively adjusting the current magnitude and anode position after search. This scheme was used for finite element calculation. The whole surface of the hull could be protected and the protection rate was 100%. The corresponding current required for each anode was only 0.057 26 A, and the highest protection potential was about ~0.84 V. The over-protection phenomenon was negligible. The problems encoun-tered in the design of impressed current cathodic protection have been solved by the method proposed above, which has the ad-vantages of simplicity, easy operation and universality.