Prediction Spectrum Between Ship Vibration and PEMFC’s Performances Based on Simulation Method

To analyze and evaluate the influence of ship vibration on the performance of proton exchange membrane fuel cell (PEMFC), the frequency domain and amplitude limitation random of ship vibration are studied firstly. And the general PEMFC simulation mathematical model, a boundary condition, loading method based on dynamic mesh technology is proposed to establish the simulation route of PEMFC’s performances changeable rule from ship vibration’s effect. Secondly, in the designated solution domain of ship vibration, the simulation schemes of PEMFC’s performances are designed and proceed to explore the influence features of ship vibration direction, frequency and amplitude. According to simulation datum, the concept of "one line and two zones" is proposed to describe ship vibration’s effect on the performance of fuel cell. That is the saturation line, the truncation zone and the continuous output zone of vibration influence. The construction technology and the partition concept of the prediction spectrum of ship vibration PEMFC performance relationship based on the polynomial fitting method are formed. At the same time, the prediction spectrum of PEMFC’s performances with the frequency of 0 ~ 20Hz and the amplitude of 0-1.6mm is drawn. Finally, the simulation method is used to evaluate the accuracy of the prediction spectrum. The results show that the error of the prediction spectrum in region I is within 5%, while that in region II is within 10%.