RESPONSE OF DAMPED OSCILLATORS TO CYCLOIDAL PULSES

The transient response of a single degree-of-freedom to pulse excitations is of interest to various engineering applications, including automobiles, cranes, aircraft, and building structures. Recently, the transient response of damped structures under pulse-type motions resurfaced as a practical problem that triggered strong interest in earthquake engineering. This study investigated the transient response of a damped oscillator subjected to cycloidal pulses. The response is computed analytically by considering viscous and friction damping, and response spectra for relative and absolute quantities are presented for the linear viscous and sliding oscillator. The study complements the list of numerous shock spectra mostly published for the undamped linear oscillator. Subsequently, a numerical procedure based on a state-space formulation is developed to compute the response of damped oscillators when subjected to ground motions recorded near the source of strong earthquakes. It is found that although on several occasions such motions resemble cycloidal pulses, the response of structures with low to moderate periods is substantially affected by the high-frequency fluctuations that often override the long duration pulse.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339399
• Supplemental Notes:
  • Partial financial support for this study was provided by the National Science Foundation under Grant CMS-9696241 and the California Department of Transportation under Grant RTA-59A169.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Makris, N
  • Chang, S-P
• Publication Date: 2000-2

Language

• English

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 123-131
• Serial:
  • Journal of Engineering Mechanics
  • Volume: 126
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9399
  • EISSN: 1943-7889
  • Serial URL: http://ascelibrary.org/journal/jenmdt

Subject/Index Terms

• TRT Terms: Aircraft; Approximation (Mathematics); Automobile engineers; Cranes; Damping (Engineering); Degrees of freedom; Earthquake engineering; Earthquakes; Friction; Oscillation; Pulses; Seismicity; Shock (Mechanics); Sliding friction; Structural analysis; Structural engineering
• Subject Areas: Aviation; Bridges and other structures; Design; Highways; Maintenance and Preservation; Vehicles and Equipment; I24: Design of Bridges and Retaining Walls; I61: Equipment and Maintenance Methods; I90: Vehicles;

Filing Info

• Accession Number: 00783855
• Record Type: Publication
• Contract Numbers: CMS-9696241, RTA-59A169, CMS 95-00301
• Files: TRIS
• Created Date: Feb 28 2000 12:00AM