mechanical
Mechanical Dynamics Laboratory
Realizing new vibration/acoustic tests with a laser technique or a soft actuator/sensor
Vibration or acoustic tests that are recognized as a fundamental technique in machinery dynamics fields are used to design machines or structures with desired dynamic performance such as a natural frequency or vibration mode shape. In general, we use a hammer, a shaker, a speaker, etc. to input and an accelerometer, a microphone, etc. to measure responses, respectively. It might be hard to demonstrate the tests using conventional excitation devices, if the target structures are very small, soft, fragile, etc. We have realized a new excitation method based on a laser plasma, including laser ablation (LA) or laser shockwave (LS) to solve these limitations. Further欧洲杯足彩app下载_欧洲杯下注平台-【直播*网站】, we have established a speaker for acoustic tests made of dielectric elastomer actuators whose characteristics are soft, flexible, light weight, etc., realizing a balloon speaker.
College of Engineering Mechanical Engineering Advanced Mechanical Engineering
/ Graduate School of Engineering and Science（Master's Program） Mechanical Engineering Course
/ Graduate School of Engineering and Science（Doctor's Program） Functional Control Systems Course
- Faculty Name
- HOSOYA, Naoki
- Keyword
- Vibration testing,Acoustic testing,Laser technique,Laser ablation,Laser-induced plasma,Shock wave,Non-destructive testing,Vibration control,Modal analysis,Ultrasonics,Lamb waves
- Laboratory location
- Research Building TOYOSU Campus 4F 04B32-a
This lab is for this SDG activity:
STUDY FIELDS
- Mechanical engineering
- Vibroacoustic engineering
- Mechanical dynamics
- Aeronautical engineering
- Applied physics
FOR SOCIETY
By establishing a laser technique, we can conduct vibration tests on areas that have previously proven difficult, such as water robot manipulators, revolving bodies, membrane structures, MEMS (micro electro mechanical systems) and NEMS (nano electro mechanical systems), and the quality assessment of fruits and vegetables.
RESEARCH THEMES
- Develop analytical methods for no-contact, no-fracture, vibroacoustic experiments using laser-induced plasmas
- Produce innovative speakers using dialectic elastomer actuators
- Measure frequency response functions taking into account the degree of rotational freedom
- Detect damage to airplane structures using Lamb waves
- Evaluate fruit and vegetable quality using shock waves from laser-induced plasmas
