Title:
SELF-EXCITED VIBRATION EVALUATION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/061398
Kind Code:
A1
Abstract:
This self-excited vibration evaluation method for evaluating self-excited vibration of a pipe group arranged in a fluid so as to be supported by a support member, comprises: a time history response analysis step for performing time history response analysis in which a change in the vibration amplitude of the pipe group is simulated for each of one or more unique modes of the pipe group while a negative attenuation ratio corresponding to an exciting force of the fluid is changed; a limitation flow rate calculation step for calculating a limitation flow rate of the fluid on the basis of the minimum negative attenuation ratio at which the change of the vibration amplitude of the pipe group is diverged in the time history response analysis; an input step for inputting an expected flow rate of the fluid; and an evaluation step for evaluating the self-excited vibration of the pipe group for each of the unique modes by comparing the expected flow rate of the fluid with the limitation flow rate of the fluid.
Inventors:
NISHIDA SHINGO (JP)
IWASAKI MAKOTO (JP)
HIROTA KAZUO (JP)
KAWAKAMI RYOICHI (JP)
IWASAKI MAKOTO (JP)
HIROTA KAZUO (JP)
KAWAKAMI RYOICHI (JP)
Application Number:
PCT/JP2017/025132
Publication Date:
April 05, 2018
Filing Date:
July 10, 2017
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
G06F17/50; F22B1/16
Foreign References:
| JP2014134957A | 2014-07-24 | |||
| JP2015026259A | 2015-02-05 |
Other References:
HIROKI TANAKA: "Study on Fluid-elastic Vibration of Tube Bundle (Multi-rows of Cylinders", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS, vol. 46, no. 404, April 1980 (1980-04-01), pages 600 - 609, XP009511552, ISSN: 0387-5008, [retrieved on 20170830]
TOSHIHIKO HORIUCHI: "Impact Vibration Analysis of Group of Hexagonal Bars Immersed in Liquid", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS SERIES C, vol. 60, no. 576, August 1994 (1994-08-01), pages 2691 - 2698, XP009511563, ISSN: 0387-5024, [retrieved on 20170830]
See also references of EP 3451204A4
TOSHIHIKO HORIUCHI: "Impact Vibration Analysis of Group of Hexagonal Bars Immersed in Liquid", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS SERIES C, vol. 60, no. 576, August 1994 (1994-08-01), pages 2691 - 2698, XP009511563, ISSN: 0387-5024, [retrieved on 20170830]
See also references of EP 3451204A4
Attorney, Agent or Firm:
SEISHIN IP PATENT FIRM, P.C. (JP)
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