RUI: Modal Testing Using Ultrasound Stimulated Radiation Force Excitation

- 我知道模态测试使用超声激励辐射力ExcitationAbstract：这个师生项目的目标是调查的能力，超声激励辐射力激励在空气中作为一种非接触的方法测量振动模式。这种方法的独特之处在于，可以通过超声信号的干涉向物体施加驱动力，而换能器和物体之间没有物理接触。当超声辐射力激励与使用激光测振仪的检测相结合时，这提供了完全无接触的激励和检测的明显优点。由于不需要机械接触来振动物体，因此该技术在模态测试中具有很大的潜力，特别是在微机电系统（MEMS）和类似小型设备的研究中。使用超声辐射力，还可以选择性地激发对象的不同振动模式，同时抑制其他振动模式。 该项目将导致对超声辐射力的能力和局限性及其在模态测试中的应用的更基本的理解。在详细的实验研究的同时，另一个主要目标将是创建一个计算机模型的激发过程。该模型将是必不可少的一些对象的响应的详细定量研究，开发新的技术，并研究实际应用的超声辐射力激励。

RUI: Modal Testing Using Ultrasound Stimulated Radiation Force ExcitationAbstract:The goal of this faculty-student project is to investigate the capabilities of ultrasound stimulated radiation force excitation in air as a noncontact method of measuring vibrational modes. The unique characteristic of this method is that a driving force can be applied to the object through the interference of ultrasound signals, with no physical contact between the transducer and object. When ultrasound radiation force excitation is coupled with detection using a laser vibrometer, this provides the distinct advantage of both excitation and detection completely without contact. Since there is no mechanical contact required to vibrate the object, this technique has great potential in modal testing, especially in the study of Micro Electro-Mechanical Systems (MEMS) and similar small devices. Using the ultrasound radiation force, it is also possible to selectively excite different vibrational modes of an object while suppressing others. This project will result in a more fundamental understanding of the capabilities and limitations of the ultrasound radiation force, and its application for modal testing. In parallel to the detailed experimental studies, another major objective will be to create a computer model of this excitation process. This model will be essential for detailed quantitative studies of the response of some objects, to develop new techniques, and to study practical applications of the ultrasound radiation force excitation.