On the recovery of surface wave by pressure transfer function |
| |
| Authors: | Cheng-Han Tsai Min-Chih Huang Fu-Ji Young Yin-Chern Lin Hsien-Wen Li |
| |
| Institution: | aDepartment of Oceanography, National Taiwan Ocean University, Keelung 202, Taiwan;bDepartment of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan 701, Taiwan;cDepartment of Civil Engineering, Ming Hsin University of Science & Technology, Hsin Feng, Hsin-Chu County 304, Taiwan |
| |
| Abstract: | Except the commonly selected pressure transfer function derived from the linear wave theory, a previous study on the pressure transfer function for recovering surface wave from underwater pressure transducer suggested that the pressure transfer function is a function of frequency parameter only. With careful analysis, this study showed that the pressure transfer function should include a transducer submergence parameter as that given by the linear theory. It was found that the previously suggested empirical formula should be restricted to measurements with the pressure transducer close to the surface; otherwise overestimation of wave height would result. Field measurements were carried out with an acoustic wave gauge and a synchronized pressure transducer located at various depths with submergence parameter close to 1 (near the sea floor). It was shown that the previous one-parameter empirical formula might overestimate the significant wave height by more than 30%. This study found that with deep-water wave bursts excluded, the transfer function based on the linear wave theory provided a fairly good estimation on the significant wave heights, with an average deviation of 3.6%. |
| |
| Keywords: | Frequency parameter Submergence parameter Acoustic wave gauge |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
