Curriculum Vitaes
Profile Information
- Affiliation
- Professor, Faculty of Systems Engineering, Department of Systems Engineering, Osaka Sangyo University
- Degree
- Ph.D.(Sep, 2007, Osaka Prefecture University)
- Researcher number
- 50763794
- J-GLOBAL ID
- 202201021077230660
- researchmap Member 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．
Research Areas
6Research History
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Apr, 2025 - Present
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May, 2023 - May, 2025
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Apr, 1990 - Mar, 2022
Education
2Committee Memberships
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Jul, 2022 - Present
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Jun, 2022 - Present
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Apr, 2014 - Present
Awards
3Papers
89-
Transactions of the JSME (in Japanese), 90(936), Aug, 2024 Peer-reviewedLead author
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Journal of Pressure Vessel Technology, 144(4), Aug, 2022 Peer-reviewedLead authorAbstract 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, Apr, 2022 Peer-reviewed
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JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME, 143(6), Dec, 2021 Peer-reviewed
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JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME, 141(1), Feb, 2019 Peer-reviewed
Misc.
40-
2016(53) "1002-1"-"1002-5", Mar 1, 2016
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2015 "GS0114-346-1"-"GS0114-346-3", Nov 21, 2015In 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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The Computational Mechanics Conference, 2015(28) "110-1"-"110-3", Oct 10, 2015
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Dynamics and Design Conference : D & D, 2015 "723-1"-"723-12", Aug 25, 2015The 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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INSS journal : Journal of the Institute of Nuclear Safety System, 22 186-198, 2015
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INSS journal : Journal of the Institute of Nuclear Safety System, 21 61-74, 2014
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INSS journal : Journal of the Institute of Nuclear Safety System, 21 75-85, 2014
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INSS journal : Journal of the Institute of Nuclear Safety System, 20 95-108, 2013
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INSS journal : Journal of the Institute of Nuclear Safety System, 20 84-94, 2013
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INSS journal : Journal of the Institute of Nuclear Safety System, 20 56-71, 2013
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Journal of the Institute of Nuclear Safety System (原子力安全システム研究所論文集), 19 50-64, 2012
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INSS journal : Journal of the Institute of Nuclear Safety System, 19 75-83, 2012
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INSS journal : Journal of the Institute of Nuclear Safety System, 19 84-94, 2012
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INSS journal, 18 125-136, 2011
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INSS journal, 18 118-124, 2011
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Transactions of JWRI, 39(2) 65-67, Dec, 2010
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INSS journal, 17 60-74, 2010
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The proceedings of the JSME annual meeting, 2009 213-214, 2009Residual 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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The proceedings of the JSME annual meeting, 2009 207-208, 2009Residual 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", Sep 2, 2008This 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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2008(45) 293-294, Mar 1, 2008
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Dynamics & Design Conference, 2007 "111-1"-"111-6", Sep 25, 2007In 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", Sep 25, 2007A 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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2007(44) 105-106, Mar 1, 2007
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Dynamics & Design Conference, 2006 "302-1"-"302-6", Aug 6, 2006This 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", Aug 22, 2005Vibration 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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The proceedings of the JSME annual meeting, 2005 515-516, 2005This 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.
Books and Other Publications
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American Society of Mechanical Engineers, Jul, 2023 (ISBN: 9780791875872)
Presentations
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The Proceedings of Mechanical Engineering Congress, Japan Society of Mechanical Engineers, Sep, 2024
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The Proceedings of Dynamics and Design Conference, Japan Society of Mechanical Engineers, Sep, 2024
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Anual Congress, Japan Society of Maintenology, Aug, 2024
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The Proceedings of Mechanical Engineering Congress, Japan Society of Mechanical Engineers, Sep, 2023
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The Proceedings of Dynamics and Design Conference, Japan Society of Mechanical Engineers, Aug, 2023
Teaching Experience
4Professional Memberships
6Industrial Property Rights
3Academic Activities
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Planning, Management, etc.2015 - Present
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Planning, Management, etc.日本機械学会 北陸信越支部 特別講演会（福井大学文京キャンパスにて開催）, Nov 21, 2014
Social Activities
11研究テーマ
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研究テーマ（英語）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）（英語）2003
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研究テーマ（英語）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）（英語）2010
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研究テーマ（英語）機器・配管系の地震応答低減に関する研究研究期間（開始）（英語）2010
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研究テーマ（英語）配管振動の計測法と評価法に関する研究研究期間（開始）（英語）2004
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研究テーマ（英語）配管内圧力脈動に関する研究研究期間（開始）（英語）2008