GB1442217A - Vibration damping device in particular for ships - Google Patents

Vibration damping device in particular for ships

Info

Publication number
GB1442217A
GB1442217A GB3988273A GB3988273A GB1442217A GB 1442217 A GB1442217 A GB 1442217A GB 3988273 A GB3988273 A GB 3988273A GB 3988273 A GB3988273 A GB 3988273A GB 1442217 A GB1442217 A GB 1442217A
Authority
GB
United Kingdom
Prior art keywords
damper
liquid
ship
propeller
vibrations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3988273A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chantiers de lAtlantique SA
Original Assignee
Chantiers de lAtlantique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chantiers de lAtlantique SA filed Critical Chantiers de lAtlantique SA
Publication of GB1442217A publication Critical patent/GB1442217A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
    • B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

1442217 Diminishing vibrations CHANTIERS DE L'ATLANTIQUE 22 Aug 1973 [24 Aug 1972] 39882/73 Heading B7S [Also in Division F2] Propeller and wave-induced vibrations in a ship's hull are damped by an inertia weight vibration damper fitted into the hull of the ship above the propeller. The vibration damper (depicted in more detail in Figs. 1 and 2, not shown, but see Division F2) consists essentially of a chamber containing two gas spaces (12, 13) separated by a body of liquid (11), the liquid acting as an inertia weight tuned by the gas, one of the gas spaces being subdivided into two compartments 14, 15 connected by a device (a so-called fluidic diode 17, not shown) which makes flow from 14 to 15 easier than from 15 to 14. As shown the chamber of the damper is of anchor shape in cross-section to provide symmetry, and has three gas spaces acting on the body of liquid. The presence of the fluidic diode enables the damper to adjust itself so that its frequency approaches the excitation frequency of the ship. The damper has an auxiliary damper 20 in communication with it via the fluidic diode. The auxiliary damper contains a smaller mass of liquid and comes into operation at a lower frequency than the main damper so as to damp the vibrations which arise when the propeller screw is being started up from rest.
GB3988273A 1972-08-24 1973-08-22 Vibration damping device in particular for ships Expired GB1442217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7230229A FR2197434A5 (en) 1972-08-24 1972-08-24

Publications (1)

Publication Number Publication Date
GB1442217A true GB1442217A (en) 1976-07-14

Family

ID=9103522

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3988273A Expired GB1442217A (en) 1972-08-24 1973-08-22 Vibration damping device in particular for ships

Country Status (3)

Country Link
JP (1) JPS541865B2 (en)
FR (1) FR2197434A5 (en)
GB (1) GB1442217A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194017A (en) * 1986-08-06 1988-02-24 Shimizu Construction Co Ltd Suppressing vibration of a structure
WO2006099650A1 (en) * 2005-03-24 2006-09-28 Technische Universität Wien Fluid damper for damping oscillations in constructions
RU2474738C2 (en) * 2007-09-27 2013-02-10 Бернард Инженере Цт Гмбх Hydraulic damper for reduction of vertical and/or horizontal vibrations of facility or mechanism structure

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53139750A (en) * 1977-05-07 1978-12-06 Matakichi Kawaguchi Surface treating method of fruit
JPS5492596U (en) * 1977-12-14 1979-06-30
JPS54121491U (en) * 1978-02-15 1979-08-25
JPS54145075A (en) * 1978-05-02 1979-11-12 Imamura Seisakusho Kk Attenuation method of lowwfrequency vibration
JP4981736B2 (en) * 2008-04-09 2012-07-25 三菱重工業株式会社 Hull structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194017A (en) * 1986-08-06 1988-02-24 Shimizu Construction Co Ltd Suppressing vibration of a structure
GB2194017B (en) * 1986-08-06 1991-01-23 Shimizu Construction Co Ltd Device for suppressing vibration of structure
WO2006099650A1 (en) * 2005-03-24 2006-09-28 Technische Universität Wien Fluid damper for damping oscillations in constructions
RU2474738C2 (en) * 2007-09-27 2013-02-10 Бернард Инженере Цт Гмбх Hydraulic damper for reduction of vertical and/or horizontal vibrations of facility or mechanism structure

Also Published As

Publication number Publication date
JPS541865B2 (en) 1979-01-30
FR2197434A5 (en) 1974-03-22
JPS4958282A (en) 1974-06-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920822