circumferential wave 中文意思是什麼
circumferential wave
解釋
環形波- circumferential : adj. 1. 周圍的，四周的。2. 委婉的。
- wave : n 〈美海軍〉女志願軍人〈見 WAVES 條〉。n 1 波浪；碎浪； 〈the wave（s）〉 〈詩〉海。2 波動；波狀...
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Wave propagation characteristics of cylindrical shells with circumferential surface crack
含環向表面裂紋圓柱殼的波傳播特性研究 -
Finally, some important conclusions were drawn, that is, using distributed pzt transducers, ultrasonic guided waves are generated and received in a pipe. usually, there are many different modes of guided wave propagating in the pipe and these modes are generally dispersive, the specific exciting signal of a harming windowed toneburst with a central frequency of 70khz for decreasing the effect of dispersion was selected. and guided wave are generated using 16 distributed pzt transducers in a circumferential direction for suppressing flexural modes
首先，對當前本課題研究領域的進展作出綜述，並簡要介紹與超聲導波技術相關的理論基礎；其次，建立了一套有效的實驗裝置，在此實驗裝置基礎上，重點研究了採用分散式pzt傳感器在管中激勵和接收特定模態超聲導波的方法：根據在管狀波導中傳播的超聲波具有頻散現象及多模態特徵，選擇具有單一頻率的特定信號激勵超聲導波，使其頻散最小；同時採用分散式傳感器抑制不同模態的波型。 -
Based on the numerical simulation for the large - diameter cylinder pile ' s 3d - circumferential flow under wave - flow co - function b using fvm, this paper analyzes the complicated 3d - torrent near the large - diameter cylinder pile, and gives the 3d - flow distribution, the stress distribution on the surface of cylinder pile and in the bed near the cylinder pile, furthermore, analyzes local scour of wave flow in the bed near the cylinder pile
摘要通過應用有限體積法對在波流共同作用下大直徑圓柱繞流現象進行三維數值模擬，對圓柱體局部復雜流動進行了三維湍流計算分析，給出了三維流場、圓柱體表面及其所在局部底床床面應力分佈，並在此基礎上對圓柱體所在底床的局部沖刷進行了初步分析。 -
The reynolds number of the flow is 3000. the circumferential wave number of psb disturbance is 1. the frequency of disturbance is 0. 5
本文計算中流動的雷諾數選定為3000 ， psb擾動的周向波數選定為1 ，擾動頻率選定為0 . 5 ，擾動寬度選定為。
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