• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Active and passive smart structures and integrated systems; 20090309-12; San Diego, CA(US) >Active and semiactive Vibration Damping of Turbine Blades with Piezoceramics
【24h】

Active and semiactive Vibration Damping of Turbine Blades with Piezoceramics

机译：压电陶瓷涡轮叶片的主动和半主动振动阻尼

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

In this paper the damping capability of piezoelectric shunting is analysed for bladings. Beside the broadly used inductance-resistance networks, negative capacitance techniques are considered. For the validation of the theoretic results, a test rig with a model of a bladed disk with eight blades has been manufactured and equipped with two collocated piezoceramics at each blade. One of the piezoceramics is used as an actuator for an engine order excitation. The second piezoceramics is used for shunt damping. The experimental results of the test rig are compared with numerical results. Therefore, the structure and the piezoceramics are modeled in a finite element program. The modal excitation forces of the piezoelectric actuators are derived for all modes of the structure by a static analysis with a specific voltage applied to the piezoceramics. In addition, using the modal displacement field of the static analysis the modal excitation forces can be calculated. Furthermore, the number of degrees of freedom of the system is reduced by a modal reduction technique. The electrical behavior of the piezoceramics connected to each blade is modeled by one degree of freedom and coupled with the mechanical system described above. The different damping concepts are compared with respect of their effectiveness.
机译：本文对压电分流器的阻尼能力进行了分析。除了广泛使用的电感电阻网络外，还考虑了负电容技术。为了验证理论结果，已经制造出具有带有八个叶片的叶片盘模型的试验台，并且在每个叶片上配备了两个并置的压电陶瓷。压电陶瓷之一用作发动机指令激励的致动器。第二个压电陶瓷用于并联阻尼。将试验台的实验结果与数值结果进行比较。因此，在有限元程序中对结构和压电陶瓷进行建模。通过对压电陶瓷施加特定电压的静态分析，可以得出结构所有模式的压电致动器的模态激励力。此外，使用静态分析的模态位移场可以计算模态激励力。此外，通过模态缩减技术减少了系统的自由度的数量。连接到每个叶片的压电陶瓷的电性能通过一个自由度建模，并与上述机械系统耦合。比较了不同的阻尼概念的有效性。

著录项

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