基于准零刚度理论的应力补偿碟簧设计

Design of Stress Compensation Disc Spring Based on Quasi-zero Stiffness Theory

为了补偿质子交换膜燃料电池电堆长时间储存和复杂的运行环境发生的应力松弛行为,设计了一种基于碟簧的准零刚度结构。针对武汉理工大学25kW电堆受力情况,建立了以内外径、厚度、单片碟簧自由高度和叠合组合中碟簧片数为自变量的碟簧模型,并采用遗传算法寻求最优解。结果显示,以最优解设计的碟簧结构在允许的受力范围内的最大位移高达1.018mm。最后通过有限元软件ANSYS验证了上述模型的合理性。

In order to compensate for the stress relaxation behavior of proton exchange membrane fuel cell stacks due to long-term storage and complex operating environment,aquasi-zero stiffness structure based on disc springs was designed.According to the force of the 25 kW stack of Wuhan University of Technology,a disc spring model with the inner and outer diameter,thickness,free height of the single disc spring,and the number of disc springs in the stack as independent variables was established,and the genetic algorithm was used to find the optimal solution.The experimental results show that the maximum displacement of the disc spring structure designed with the optimal solution within the allowable force range is as high as 1.018 mm.Finally,the rationality of the above model was verified by the finite element software ANSYS.