스펙트럴 요소법을 이용한 연료전지 파워팩의 진동 거동 분석

In this study, the vibration characteristics of the hydrogen fuel cell power pack installed on a construction vehicle were analyzed. An analytical model was proposed to reflect the vibration behavior. Using the proposed model, the vibration modal characteristics of the hydrogen fuel cell power pack were predicted. The vulnerable parts of the power pack were evaluated. When external vibration is transmitted to the power pack, the durability and efficiency of the power pack degrades. The vibration characteristics of the actual fuel cell power pack under the vibration input were measured. The dominant vibration behavior and locations of large vibration responses were identified. The analytical model to analyze those obtained from the experiment was constructed by using the spectral element method (SEM). To verify the analytical model, the main vibration characteristics were compared with the measured ones. Consequently, the vibration behaviors of the fuel cell power pack were investigated to improve durability of the fuel cell.