Department of Mechanical Engineering, Hanyang University, Wangsimni-ro 222, Seoul 04763, Republic of Korea.
Department of Mechanical Engineering, Hanyang University, Wangsimni-ro 222, Seoul 04763, Republic of Korea.
Environ Res. 2019 Jun;173:48-53. doi: 10.1016/j.envres.2019.03.022. Epub 2019 Mar 8.
The purpose of this study was to investigate dynamic characteristics of a proton exchange membrane fuel cell (PEMFC). Fuel cell mounted on a vehicle is excited by road irregularities in operation conditions. To minimize performance degradation, proper vibration isolation after considering vibration properties is required. The vibration modal characteristics of PEMFC was measured by impact test to determine a dominant mode which affects fuel cell durability. The frequency range of the principal responses was identified by comparing the acceleration and interior noise in a fuel cell vehicle. At the resonant frequencies, the mode shapes of the PEMFC were analyzed. The measurement procedures to determine effective dynamic properties of a stack structure were proposed. Structural features of the stacked cell were considered when beam type specimens were fabricated. As the bending and torsional vibrations were applied to the specimens, the vibration responses were measured. The frequency dependent dynamic properties were obtained from the acceleration responses. The measured dynamic properties were compared for different beam constructions. Consequently, influence of structural features on the vibration modes was identified.
本研究旨在探讨质子交换膜燃料电池（PEMFC）的动态特性。在运行条件下，安装在车辆上的燃料电池会受到道路不平坦的激励。为了最小化性能下降，需要在考虑振动特性后进行适当的隔振。通过冲击试验测量 PEMFC 的振动模态特性，以确定影响燃料电池耐久性的主导模态。通过比较燃料电池车辆中的加速度和内部噪声来确定主要响应的频率范围。在共振频率下，分析了 PEMFC 的模态形状。提出了确定堆叠结构有效动力特性的测量程序。在制造梁式试样时，考虑了堆叠电池的结构特征。当对试样施加弯曲和扭转振动时，测量振动响应。从加速度响应中获得频率相关的动力特性。比较了不同梁结构的测量动力特性。结果表明，结构特征对振动模式有影响。
