2013 Fiscal Year Final Research Report
A Study on the High Performance of Ultrasonic Inspection by Numerical Simulation
| Project/Area Number |
23360387
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Naval and maritime engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
YOSIKAWA Takao 九州大学, 工学(系)研究科(研究院), 教授 (50380572)
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| Co-Investigator(Kenkyū-buntansha) |
MAEDA Masahiro 九州大学, 大学院・工学研究院, 助教 (70173713)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 超音波探傷 / シミュレーション / 欠陥同定 / 塗膜 / 音源重ね合わせ |
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| Research Abstract |
We have developed an ultrasonic wave propagation simulation program based on superposition method of point sound sources. The calculation results were compared with FE and experimental results, and its accuracy were confirmed.
Using the developed method, the simulation of ultra sonic propagation can be performed with 1/1000 conputating time of FE calculation.
Defects detection under the presence of the coating film of the steel material is required for the ship in service. The echo height from a defect varies nonlinearly with coating thickness. It was clarified that it is due to the mode conversion of ultrasonic waves at the boundary between coating and steel and the multiple reflection of the ultrasonic wave in the coating film.
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