Determination of nearfield-farfield boundary and ultrasonic wave propagation on cylindrical shells = Nearfield 와 farfield 의 경제결정 및 원형튜브에서의 초음파의 진행

Determination of the nearfield-farfield boundary for a transducer of 1-MC and 1-inch diameter in water was performed from the measurement of the on-axis ultrasonic echo height using a finite size reflector. The boundary moved farther compared with the point field calculation. The last minimum position moved nearer. In contrast to the point field there was no real zero field. The result of our numerical simulation agreed well with the experiment in the farfield reasion. The ultrasonic wave propagation on the pyrex-glass cylindrical shells was investigated in water using the pulse-echo method. The shells were of 6 kinds with different inner radius b and outer radius a. There was a series of periodic echoes following the specular reflection echo. These echoes were direct verification of the existence of the "circumferential" or "Creeping" waves. For the available b/a-region, i.e., 0.84 b/a 0.95, the velocity was almost constant for 0.5
Advisors
Kim, Ho-Chulresearcher김호철researcher
Publisher
한국과학기술원
Issue Date
1984
Identifier
64026/325007 / 000821269
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 물리학과, 1984.2, [ iv, 69 p. ]

URI
http://hdl.handle.net/10203/48065
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=64026&flag=t
Appears in Collection
PH-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.
  • Hit : 43
  • Download : 0
  • Cited 0 times in thomson ci

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0