CONTROL OF FLUTTER IN BRIDGES

The suppression of the flutter instability of a suspension bridge by means of feedback control is studied. To this end, the mathematical model considered consists of the midsection of a bridge, assumed to be fixed at the bridge towers. The partial differential equations of motion can be converted into a set of second-order ordinary differential equations by using Galerkin's method. The design of optimal control is carried out by the independent modal-space control method. The closed-loop eigenvalues are selected so that the unstable flutter mode acquires a negative real part while the open-loop frequency remains unchanged. A numerical example is given in which the flutter of a suspension bridge deck having aerodynamic characteristics similar to those of the original Tacoma Narrows Bridge is controlled.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339399
• Supplemental Notes:
  • Presented at the July 15-17, 1985, Second International Symposium on Structural Control, held at Waterloo, Canada.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Meirovitch, L
  • GHOSH, D
• Publication Date: 1987-5

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 720-736
• Serial:
  • Journal of Engineering Mechanics
  • Volume: 113
  • Issue Number: 5
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9399
  • EISSN: 1943-7889
  • Serial URL: http://ascelibrary.org/journal/jenmdt

Subject/Index Terms

• TRT Terms: Differential equations; Eigenvalues; Feedback control; Flutter; Flutter (Aeronautics); Mathematical models; Partial differential equations; Suspension bridges
• Old TRIS Terms: Galerkin's method
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00472570
• Record Type: Publication
• Report/Paper Numbers: Paper No. 21482
• Files: TRIS
• Created Date: Aug 31 1987 12:00AM