Hitachi, Ltd.

Yuuji Tadano

Toshihiko Horiuchi

Takao Konno

Kazuhiro Umekita

Yasuyuki Momoi

Masahiko Inoue

Masaharu Sugano

The testing performs a vibration excitation testing of a part of the structure, performs a numerical calculus of vibration response of the other parts of the structure, and calculates the vibration response of a whole of the structure by combining these two methods. Testing includes calculating a position of a point of exciting force on the basis of vibration exciting, and calculating a reaction force on the basis of a load detected and the position of the point of exciting force. Then, a displacement of a numerical model is computed by using the reaction force calculated and a known external force, and calculating a vibration exciting machine displacement command value on the basis of the displacement. A drive drives the vibration exciting on the basis of an output thereof. Vibration excitation is performed in the translational direction as well as the rotational direction.

Vibration exciting apparatus and vibration testing apparatus for structure using same

Multiple degree of freedom vibration exciting apparatus and system

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Takamatsu, Japan

Yuuji Tadano