Akira Maekawa

(前川晃)

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 Interests

Research Areas

Research History

Apr, 2025 - Present

Professor, Department of Systems Engineering, Osaka Sangyo University
May, 2023 - May, 2025

Director, Japan Association for Earthquake Engineering
Apr, 2022 - Mar, 2025

Professor, Faculty of Engineering Department of Mechanical Engineering, Osaka Sangyo University
Apr, 1990 - Mar, 2022

The Kansai Electric Power. Co., Inc.

Education

- Mar, 1990

Master Course of Engineering, Graduate School of Engineering, Osaka Prefecture University
- Mar, 1988

School of Engineering, Osaka Prefecture University

Committee Memberships

Awards

Papers

Conceptual design and feasibility for an effective elastic-plastic pipe support on seismic response reduction

Akira MAEKAWA, Michiaki SUZUKI

Transactions of the JSME (in Japanese), 90(936), Aug, 2024 Peer-reviewedLead author
Proposal of an Improved Contactless Measurement Method Using an Advanced Light Emitting Diode Displacement Sensor for Vibration Stress of Piping Systems

Akira Maekawa, Takashi Tsuji, Tsuneo Takahashi

Journal of Pressure Vessel Technology, 144(4), Aug, 2022 Peer-reviewedLead author

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.
Influential factors for noncontact measurement method of vibration stress using multiple laser displacement sensors

Akira Maekawa, Michiyasu Noda, Masanori Shintani, Michiaki Suzuki

OPTICS AND LASERS IN ENGINEERING, 151, Apr, 2022 Peer-reviewed
Impact of Inelastic Seismic Design Using Elastic-Plastic Pipe Supports on Vibration Response of Piping Systems

Akira Maekawa, Tsuneo Takahashi

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME, 143(6), Dec, 2021 Peer-reviewed
Numerical Study on Inelastic Seismic Design of Piping Systems Using Damping Effect Based on Elastic-Plastic Property of Pipe Supports

Akira Maekawa, Tsuneo Takahashi

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME, 141(1), Feb, 2019 Peer-reviewed

Misc.

1002 Reduction of welding residual stress using ultrasonic vibration : Influence of response acceleration amplitude

MUTOH Shota, AOKI Shigeru, KURITA Katsumi, KOSHIMIZU Shigeomi, MAEKAWA Akira

2016(53) "1002-1"-"1002-5", Mar 1, 2016
GS0114-346 Reduction of the residual stress using ultrasonic vibration : Influence of acceleration amplitude for welding of thin plate of SUS304

MUTO Shota, AOKI Shigeru, KURITA Katsumi, KOSHIMIZU Shigeomi, MAEKAWA Akira

2015 "GS0114-346-1"-"GS0114-346-3", Nov 21, 2015

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.
110 Study on crack progress analyzing system under the residual stress

NOSE Masahiro, OKADA Hiroshi, YUSA Yasunori, MAEKAWA Akira

The Computational Mechanics Conference, 2015(28) "110-1"-"110-3", Oct 10, 2015
723 Noncontact measurement method of piping vibration using an LED-optical displacement sensor

MAEKAWA Akira, TSUJI Takashi, TAKAHASHI Tsuneo

Dynamics and Design Conference : D & D, 2015 "723-1"-"723-12", Aug 25, 2015

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.
Development of Contactless Measurement Methods Using Optical Displacement Sensors for Piping Vibration and Measurement Instruments

INSS journal : Journal of the Institute of Nuclear Safety System, 22 186-198, 2015