研究者業績
基本情報
- 所属
- 大阪産業大学 システム工学部 システム工学科 教授
- 学位
- 博士（工学）(2007年9月 大阪府立大学)
- 研究者番号
- 50763794
- J-GLOBAL ID
- 202201021077230660
- researchmap会員ID
- R000035591
広島県尾道市（旧 因島市）出身．広島県立因島高等学校卒業．1988年大阪府立大学工学部卒業．1990年大阪府立大学大学院博士前期課程修了．2007年博士（工学）取得．1990年関西電力株式会社に入社．関西電力では一貫して原子力発電事業に携わる．発電所および研究所，原子力事業本部，経営監査室にて，耐震設計および設備保全，規格基準，高経年化対策，原子力監査などの業務に従事した後，2022年大阪産業大学工学部機械工学科教授．専門は，振動工学，耐震・制振工学，設備保全工学，規格基準，原子力工学．
研究分野
6経歴
4-
2025年4月 - 現在
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2023年5月 - 2025年5月
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2022年4月 - 2025年3月
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1990年4月 - 2022年3月
学歴
2-
- 1990年3月
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- 1988年3月
委員歴
26-
2022年6月 - 現在
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2011年7月 - 現在
受賞
3論文
89-
Journal of Pressure Vessel Technology 144(4) 2022年8月 査読有り筆頭著者Abstract This paper proposes an improved contactless measurement method for vibration stress of piping systems, by which the measurement time is shorter and the measuring works are more simple. The proposed method includes two processes, in which the bending mode shape of piping vibration is identified by a transmission-type light emitting diode (LED) displacement sensor and the vibration stress is calculated based on beam theory using the approximated curve of the bending mode shape. The proposed method uses one advanced LED displacement sensor to measure the vibration stress in contrast to multiple conventional LED sensors, which must be used in the previous method developed by the authors. Therefore, the measuring system could be reduced in size and a light-weight and portable measurement instrument was developed. The measurement accuracy and reliability of the new method were validated by the vibration experiment using a mockup piping system.
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OPTICS AND LASERS IN ENGINEERING 151 2022年4月 査読有り
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JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME 143(6) 2021年12月 査読有り
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JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME 141(1) 2019年2月 査読有り
MISC
40-
M&M材料力学カンファレンス 2015 "GS0114-346-1"-"GS0114-346-3" 2015年11月21日In welding, material is heating locally. Therefore, it generates tensile residual stress in the heat affected zone and changes the quality of material. Those will be causes problem of stress corrosion cracking in SUS304. One of the conventional prevention is to use material that hardly occur heat sensitization, but stress corrosion cracking is observed in that material. Therefore, it is desired to reduce or remove the tensile residual stress generated by welding. Accordingly, we have been proposed a method that adds ultrasonic vibration during welding. The method can reduce the tensile residual stress easily in a shorter time than conventional methods. Experimentally, it has ever been shown that this method can reduce the tensile residual stress on heated zone for thin plate of SUS304. In this study, it is examined that acceleration amplitude influences to reduction of the tensile residual stress for welding of thin plate of SUS304.
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機械力学・計測制御講演論文集 2015 "723-1"-"723-12" 2015年8月25日The present paper proposes an efficient contactless measurement method for vibration stress of piping systems, by which the measuring works are performed for an extreme short time and the measured stress can be evaluated immediately after the measurement. The proposed method uses only one LED-optical sensor to measure the vibration stress though multiple sensors must be used in the previous method developed by the authors. Therefore, the measuring system could be reduced in size and a light-weight and portable measurement instrument was developed. The measurement accuracy and reliability of the new method were verified by vibration experiments using a mock-up piping.
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Transactions of JWRI 39(2) 65-67 2010年12月
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年次大会講演論文集 2009 213-214 2009年Residual stress caused by cold bending of an austenitic stainless steel pipe was measured by X-ray diffraction method. Diffracted X-ray may be skewed by textures on steel surface may result in low accurate stress value. By adopting the finding that least-squared liner gradient of 2θ-sin^2ψ diagram is proportional to applied stress and by excluding low reliable value in the calculation, circumferential distribution of residual stress due to cold bending was successfully measured by X-ray diffraction method in comparison to the one obtained by strain gauge method.
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年次大会講演論文集 2009 207-208 2009年Residual stress distribution of cold-bent austenitic stainless steel pipe was measure with neutron diffraction method. The configuration of the pipe was 2B in diameter and Sch160 in thickness, and it was bent 90degrees by bent radius ratio of r/D=3. The residual stress distribution on 45degree cross section is discussed in this study. Radial distribution of hoop stress on intrados was linear which was typical when bending load is applied. Radial distribution on extrados was inverse to the intrados which varied compressive to tensile state. The measured result was also compared with the result by strain-gauge method.
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Dynamics & Design Conference 2008 "248-1"-"248-6" 2008年9月2日This study proposes a nonlinear vibration-response analysis method of cylindrical water storage tanks allowing coupling with the water in the tanks to be considered, and then demonstrates the proposed method can adequately simulate the experimental vibration response of tanks such as oval-type vibration. In addition, Application of the method to numerical experiment for the tanks during large input excitation, which can be hardly conducted by popular experimental equipment, is proposed. From the virtually experimental results, behavior of oval-type vibration and mechanism of occurrence of buckling is discussed.
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講演論文集 2008(45) 293-294 2008年3月1日
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Dynamics & Design Conference 2007 "111-1"-"111-6" 2007年9月25日In new measurement technique to propose, displacement by bending vibration of piping which vibrates using multiple laser displacement sensors is measured, and vibrational stress is obtained by calculating the strain produced from those displacement differences for piping. This measuring instrument is a non-contact system, and a miniaturization and short-time measurement of equipment are easy. This paper deals with the concept of the vibrational stress measurement technique, the theory of the measuring method, and the procedure using three sets of the laser displacement sensors. Furthermore, using a cantilever model, vibration experiments are conducted, displacements and strain are measured. Next, the comparison with the stress by using the displacement of experiment based on this technique and the stress from the strain of experiment is performed.
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Dynamics & Design Conference 2007 "112-1"-"112-6" 2007年9月25日A lot of damages have been reported due to fatigue of machine vibration during plant operation in nuclear power plant. The development of vibration measurement and stress evaluation that can operate quickly and easily is on demand. The purpose of this research is to develop technique which measures vibrational stress immediately using a laser displacement sensor. This paper deals with the concept of the vibrational stress measurement technique, the theory of the measuring method, and the procedure using three sets of the laser displacement sensors. The stress of the displacement and the stress of the strain are compared.
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講演論文集 2007(44) 105-106 2007年3月1日
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Dynamics & Design Conference 2006 "302-1"-"302-6" 2006年8月6日This study describes the nonlinear vibration response of a cylindrical water storage tank caused by coupling effect between the beam-type and the oval-type vibrations. The results of the frequency sweep tests with the large input acceleration demonstrate the resonance frequency of the tank shifts to the lower frequency region and the magnification factor is smaller. Considering the out-of-plane of the tank-wall induced by the oval-type vibration, a simplified model having the spring constant dependent on the amplitude of the oval-type vibration is proposed, and then the numerical simulation using this model is conducted.
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Dynamics & Design Conference 2005 "106-1"-"106-6" 2005年8月22日Vibration Tests with large-amplitude sinusoidal excitation was performed for examining the coupling effects between beam vibrations and oval vibrations on a scale model of cylindrical water storage tank, which were classified as fluid-structure coupling vibrations. As a result, any resonance points of beam vibrations disappear from their expected frequency range. The response of the tank did not intensify in proportion to the input acceleration, and moreover, did not go beyond a certain level. The coupling effects were considered to lower the flexural rigidity of the tank, and an analytical model was proposed, whose flexural rigidity depends on the magnitude of the oval vibrations.
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年次大会講演論文集 2005 515-516 2005年This paper reports on the investigation of coupling effect between beam vibrations and oval vibrations on a cylindrical water storage tank, which are excited by large amplitude sinusoidal waves. Some large amplitude sweep tests with the different magnitudes of input acceleration have conducted for a test tank. Their transfer functions showed that the predominant frequency of resonance curve had shifted to lower frequency region and the magnification factor had gotten smaller as the magnitude of input acceleration increased more. These results of vibration tests have proved that the coupling effect between beam vibrations and oval vibrations reduced the flexural rigidity of the beam vibration of a tank.
書籍等出版物
18講演・口頭発表等
113担当経験のある科目(授業)
4学術貢献活動
3社会貢献活動
11研究テーマ
5-
研究テーマ液体貯蔵タンクの耐震性と振動特性に関する研究研究期間（開始）2003
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研究テーマ機器・配管系の弾塑性地震応答に関する研究研究期間（開始）2010
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研究テーマ機器・配管系の地震応答低減に関する研究研究期間（開始）2010
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研究テーマ配管振動の計測法と評価法に関する研究研究期間（開始）2004
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研究テーマ配管内圧力脈動に関する研究研究期間（開始）2008