Method for observation of vibration mode.

摘要

The body (11) to be observed in vibration mode is vibrated, heat generated by vibration is localised at the vibrating parts, infrared emission from the body (11) is optically detected (15) to visually display the temperature distribution (16) over a surface of the body (11), which may be treated with vibration-damping and/or heat-insulating material (12) to emphasise the temperature distribution.