异型回热器热声热机结构动力学分析

利用商业软件ANSYS从结构动力学角度模拟分析了回热器结构的改变对热声热机的影响.在之前研究的基础上,改造了普通板叠回热器的结构,建立针束、肋片板、微坑板异形回热器模型,对包含各回热器的热声整机模型进行了结构动力学分析.分析得出,普通板叠回热器热声热机在150Hz附近谐振,而异型板叠回热器热机由于结构的改变,共振频率发生变化,在高阶模态应变到达峰值,说明了回热器的结构优化是提高热声热机性能的有效手段.

Analysis of Structural Dynamics in Thermoacoustic Engine with Special-shaped Regenerators

Analysis from the perspective of structural dynamics was done to find out how the structure of regenerator affects the thermoacoustic engine. Based on ordinary stack, models of pin array and stacks with fins or with micro-slots were created in ANSYS. Structural dynamics analysis was carried out on thermoacoustic engine with all the three stacks. The results showed that the resonance frequency of engine with ordinary stack occurred at 150Hz, which changed with the special-shaped regenerators, and the maximum strain amplitude appeared at a higher order modality. And it has indicated that the optimization of the regenerator''s structure is an effective way to improve the performance of thermoacoustic engine.