GB1124125A - Damping ship hulls and other structural surfaces - Google Patents

Damping ship hulls and other structural surfaces

Info

Publication number
GB1124125A
GB1124125A GB8230/66A GB823066A GB1124125A GB 1124125 A GB1124125 A GB 1124125A GB 8230/66 A GB8230/66 A GB 8230/66A GB 823066 A GB823066 A GB 823066A GB 1124125 A GB1124125 A GB 1124125A
Authority
GB
United Kingdom
Prior art keywords
lbs
density
damping
viscoelastic
modulus
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
GB8230/66A
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.)
Lord Corp
Original Assignee
Lord Corp
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 Lord Corp filed Critical Lord Corp
Publication of GB1124125A publication Critical patent/GB1124125A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0081—Vibration isolation or damping elements or arrangements, e.g. elastic support of deck-houses

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Laminated Bodies (AREA)

Abstract

Means for damping a surface subject to flexural vibrations, which damping means comprises a damping layer of mechanically extensible and contractable polymeric viscoelastic material applied by spraying or troweling to form a coating of substantially uniform thickness and bonded to the surface, the polymeric viscoelastic material having a density substantially less than that of standard density material of like composition, and having a Young's modulus of elasticity that is related to the modulus of elasticity of the standard density material substantially in accordance with the formula <FORM:1124125/B1-B2/1> in which E\sv2=Young's modulus in lbs in2 of the standard density damping material P\sv2=density in lbs in3 of the standard density damping material E2=Young's modulus in lbs in2 of the sprayed or troweled viscoelastic damping material P2=density in lbs in3 of the sprayed or troweled viscoelastic damping material W1=weight in lbs in2 of the material of the surface to be damped W2=weight in lbs in2 of the sprayed or troweled viscoelastic layer P1=density in lbs in3 of the material of the surface to be damped; and in which the loss factor of the damping material does not vary appreciably with the actual changes in density of that material. The surface may be the hulls of submarines and surface vessels and in the example the coatings are applied to a steel plate. The damping material may be polyvinyl chloride/acetate copolymer plasticised with butyl benzyl phthallate having a filler e.g. flake graphite and carbon black.
GB8230/66A 1965-04-06 1966-02-24 Damping ship hulls and other structural surfaces Expired GB1124125A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US44601465A 1965-04-06 1965-04-06

Publications (1)

Publication Number Publication Date
GB1124125A true GB1124125A (en) 1968-08-21

Family

ID=23771003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8230/66A Expired GB1124125A (en) 1965-04-06 1966-02-24 Damping ship hulls and other structural surfaces

Country Status (1)

Country Link
GB (1) GB1124125A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207910A1 (en) * 1992-03-12 1993-09-16 Siemens Ag Resonance reducing coating, esp. plastic coating for sensors of sound in solids - contains inner roughened surface areas similar to those of file or rasp surrounding resonators
DE4235569A1 (en) * 1992-10-22 1994-04-28 Schaeffler Waelzlager Kg Linear guide for guide of machine tool - has squeeze hydraulic film between surfaces as oscillation damper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207910A1 (en) * 1992-03-12 1993-09-16 Siemens Ag Resonance reducing coating, esp. plastic coating for sensors of sound in solids - contains inner roughened surface areas similar to those of file or rasp surrounding resonators
DE4235569A1 (en) * 1992-10-22 1994-04-28 Schaeffler Waelzlager Kg Linear guide for guide of machine tool - has squeeze hydraulic film between surfaces as oscillation damper

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