The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 2006
Filed:
Dec. 28, 2004
Mayumi Fukuyama, Tokyo, JP;
Takao Konno, Tokyo, JP;
Kazuhiro Umekita, Tokyo, JP;
Yoshihiro Dozono, Tokyo, JP;
Toshihiko Horiuchi, Tokyo, JP;
Michiya Sakai, Tokyo, JP;
Yutaka Hagiwara, Tokyo, JP;
Keizo Ohtomo, Tokyo, JP;
Mayumi Fukuyama, Tokyo, JP;
Takao Konno, Tokyo, JP;
Kazuhiro Umekita, Tokyo, JP;
Yoshihiro Dozono, Tokyo, JP;
Toshihiko Horiuchi, Tokyo, JP;
Michiya Sakai, Tokyo, JP;
Yutaka Hagiwara, Tokyo, JP;
Keizo Ohtomo, Tokyo, JP;
Hitachi Plant Technologies,Ltd., Tokyo, JP;
Central Research Institute of Electric Power Industry, Tokyo, JP;
Abstract
A vibration test system for structures comprises a vibration exciter that vibrates a real model portion, a load meter that measures a load, and a computer that receives a numerical model representing a numerical model portion. The computer includes a block that calculates a displacement, which is made in a predetermined time after completion of measurement, according to a load value and an external force value. A signal production block produces a command signal using as a target value the displacement calculated by the displacement calculation block. A step control block controls the displacement calculation block and signal production block so that they will act cyclically. The displacement calculation block uses an αOS method to time integrate a solution of a vibrational equation.