Self-induced Vibrations by Thermal Stress

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概要

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• A metal beam heated by the passage of an electric current may begin to vibrate laterally under certain conditions. A horizontal wire heated by the current may also begin to vibrate vertically. When a beam moves in one direction, the front surface is cooled more than the back surface. In high frequency region, a phase lag is generated and the back surface is cooled more. Hence, in lower frequency region, the fundamental mode of cantilever at which the front part is shrinking is induced. Contrary to this, higher region the other modes are induced. The temperature of a wire, vibrating with high frequency, becomes low when it moves upwards. Then the reduction of static deflection occurs, the direction of which is equal to that of the motion of the vibrating wire. Therefore, with energy gained, a vibration can be induced.

• 一般社団法人日本機械学会の論文

著者

• Madarame Haruki

  Associate Professor Faculty Of Engineering University Of Tokyo

関連論文

• Self-induced Vibrations by Thermal Stress

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