| 摘要 |
<p>A transducer (40, 1400) and method for imparting vibrational signals to a structure (10) are disclosed. In one embodiment, a set of piezoelectric disks (53, 54) are constructed in conjunction with a deformable housing (43) to impart controlled distortions to the structure, such as to a well pipe string (10). Both longitudinal and torsional forces can be applied to the structure (10) depending upon the application. To improve transmission, the apparatus can be tuned to a frequency determined by a spectrum analysis of the pipe string (10). A reactance mass (44) may be connected to the transducer (40, 1400) to increase the amplitude of the imparted vibrations, and also to allow tuning of the frequency of vibrations of the transducer (40, 1400).</p> |
