|
| 热声板叠对工作气体纵向振动固有频率影响 |
| Effect of thermoacoustic plate stack on natural frequency of longitudinal vibration of working gas |
| 投稿时间：2024-09-03 修订日期：2024-12-24 |
| 中文摘要: |
| 为探索一定工作条件下在谐振腔中激发高强度声场途径,采用有限元思想建立了在板叠影响下气柱纵向振动方程和固有频率表达式。以此为基础,针对不同板叠参数对气柱纵向振动固有频率的影响情况进行深入分析发现,板叠长度、板叠中心位置以及板叠表面温度分布均对气柱纵向振动固有频率有影响。板叠长度越长对气柱固有频率影响越显著,但是板叠中心位于谐振腔中间位置时,低温端存在一个特殊温度值,当热声制冷机制冷温度在附近时,气柱纵向振动一阶模态频率受板叠长度影响较小。一定条件下,固有频率随板叠温度分布的变化趋势与板叠在谐振腔中的位置相关。 |
| 英文摘要: |
| The longitudinal vibration equation and natural frequency expression of gas column under the influence of plate stack are established by using finite element method. Based on this, the effects of different stack parameters on the natural frequency of the longitudinal vibration of the gas column are deeply analyzed. It is found that the stack length, the center position of the stack and the temperature distribution of the stack surface all have effects on the natural frequency of the longitudinal vibration of the gas column. The longer the stack length is, the more significant the natural frequency of the gas column is. However, when the center of the stack is located in the middle of the resonator, there is a special temperature value Tx at the low temperature end. When the cooling temperature of the thermoacoustic refrigerator is near Tx, the first mode frequency of the longitudinal vibration of the gas column is less affected by the stack length. Under certain conditions, the variation trend of natural frequency with stack temperature distribution is related to the position of stack in the resonator. The research in this paper provides the exploration direction for stimulating the longitudinal modal vibration of gas column under certain conditions to achieve high intensity sound field and improve the working efficiency of thermoacoustic refrigerator. |
| DOI： |
| 中文关键词: 热声板叠 气柱振动 固有频率 有限元 |
| 英文关键词: Thermoacoustic panel stack Air column vibration Natural frequency Finite element |
| 基金项目:国家自然科学基金(No：52266005)资助项目。 |
|
| 摘要点击次数: 3 |
| 全文下载次数: 0 |
|
查看/发表评论 下载PDF阅读器 |
| 关闭 |
