Understanding Vibrational Phenomena in Our Surroundings and Their Applications
Monozukuri (Saitama University Research Seed Collection 2025-27 p.67)
Keywords: shake, vibration, free vibration, natural period, vibration mode, forced vibration, resonance, self-excited vibration, coefficient excitation, nonlinear vibration
The figure shows the performance of a nose flute and a graph of the experimental results. It is an instrument that produces music using breath, but it has a very simple structure. We investigated the reasons why it can be played with such a simple structure. In addition, we are also examining the characteristics of string vibrations in bowed instruments like the violin. We are also researching propulsion methods for skateboards and similar devices. There are many vibrating objects around us, regardless of machinery. Although these vibrating phenomena share common characteristics, it is often difficult to identify their causes due to various factors in the actual phenomena. We aim to unravel these causes like a mystery and consider their applications based on an understanding of their mechanisms.
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Takuo Nagamine, Professor Graduate School of Science and Engineering, Department of Mechanical Science, Human Support Engineering Area 【Recent Research Topics】 ● Vibration Energy Harvesting ● Wind Power Generation ● Oscillating Propulsion Devices ● Engineering Educational Materials
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【Appeal Points to the Industry】 ● Vibration issues in machinery are problems that inevitably arise in product development. ● Especially when seeking weight reduction or noise reduction, vibrations can appear in unexpected places. ● It is often addressed on-site or in factories, and it is not uncommon to suppress vibrations without fully understanding the cause. 【Examples of Practical Application, Use Cases, and Utilization】 ● Water film vibration prevention device ● Torsional vibration prevention device
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Experimental results of nose flute performance.
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The Saitama University Open Innovation Center is a center that functions as a liaison office for industry-academia-government collaboration. It consists of three departments: the Industry-Academia-Government Collaboration Department, the Intellectual Property Department, and the Startup Support Department, each staffed with coordinators well-versed in various fields. The center's activities include solving technical challenges in companies, supporting the implementation of joint research, and conducting technology transfer aimed at introducing and utilizing Saitama University's intellectual property.