...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mechanical systems and signal processing >Flexural-mode solid-state thermoacoustics
【24h】

Flexural-mode solid-state thermoacoustics

机译：弯曲模式固态热声学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recent studies have indicated that axial waves traveling in a one dimensional solid rod can give rise to a thermoacoustically unstable response when in presence of an externally applied spatial temperature gradient. Similar to fluid-based thermoacoustics, both standing and traveling axial thermoacoustic waves can exist in solids. Elastic waves in solids are polarized, hence it is reasonable to hypothesize that thermoacoustic instabilities can affect also shear-type waves, such as flexural waves. This study extends previous research on axial-mode solid-state thermoacoustics to flexural-mode solid-state thermoacoustics (F-SSTAs). More specifically, it is shown how flexural waves can grow unbounded when traveling in a bilayer beam subject to a spatial thermal gradient. A theoretical framework is developed to analyze the dynamics of the system and to establish the criterion controlling the onset of flexural thermoacoustic instability. Numerical calculations conducted in both the frequency and the time domains show the occurrence of two main effects due to the presence of thermal coupling: (1) the dynamic amplification of the flexural motion, and (2) the time-varying location of the neutral axis. An experimental investigation is also conducted in order to corroborate the existence of this thermal-to-mechanical energy conversion mechanism associated with flexural waves.
机译：最近的研究表明，当在存在外部施加的空间温度梯度时，在一维实心棒中行进的轴向波可以产生热声学不稳定的响应。类似于流体的热声学，静置和行驶轴向热声波可以存在于固体中。固体中的弹性波是极化的，因此假设热声无稳定性可以影响剪切型波，例如弯曲波是合理的。本研究延伸了先前对轴向模式固态热声学的研究，以弯曲模式固态热声学（F-SSTA）。更具体地，示出了在经过空间热梯度的双层光束中行驶时，弯曲波是多么弯曲波动的方式。制定了理论框架来分析系统的动态，并建立控制弯曲热声不稳定的起始的标准。在频率和时间域中进行的数值计算显示由于存在热耦合的存在：（1）弯曲运动的动态放大，以及（2）中性轴的时变位置。还进行了实验研究，以证实与弯曲波相关的这种热到机械能量转换机构的存在。

著录项

  • 来源
    《Mechanical systems and signal processing》 |2021年第2期|107143.1-107143.17|共17页
  • 作者

    Haitian Hao; Carlo Scalo; Fabio Semperlotti;

  • 作者单位

    School of Mechanical Engineering Purdue University West Lafayette IN 47907 USA Ray W. Herrick Laboratories 177 South Russell Street West Lafayette IN 47907 USA;

    School of Mechanical Engineering Purdue University West Lafayette IN 47907 USA;

    School of Mechanical Engineering Purdue University West Lafayette IN 47907 USA Ray W. Herrick Laboratories 177 South Russell Street West Lafayette IN 47907 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号