Drag force on microwave antenna

CER83-84JEC-JAP-BB-NH29.CSU Project 2-95380.For Gabrial Electronics, Inc.Includes bibliographical references (page 7).December 1983

Wind-tunnel study of the East Huntington Bridge (concrete cable-stayed alternate)

For Arvid Grant and Associates, Inc.August 1980.CER80-81JEC-BB-JAP5

Wind-tunnel study of the Weirton-Steubenville cable-stayed bridge

Includes bibliographical references.For Modejski and Masters, Consulting Engineers.CER82-83JEC-BB-JAP5.A section model of the proposed Weirton-Steubenville cable-stayed bridge was used in the wind-tunnel study. The freely oscillating section model of the bridge deck was studied to evaluate the aerodynamic stability of the bridge. Basic aerodynamic derivatives were extracted in smooth flow and were used to estimate the prototype bridge critical wind speed for the one degree-of-freedom (torsional) flutter. The amplitude of the vortex-induced bridge oscillation was also assessed. The bridge section model response revealed one degree-of-freedom (torsional) flutter instability occurring at a critical wind speed dependent upon the value of mechanical damping of the model. The estimated critical speed for the prototype bridge was about 190 mph for the ratio of assumed damping to critical of the order of 0.8 percent and angles of attack in the range from -6 degrees to +6 degrees. Vortex-induced oscillation of the bridge section model (both in a vertical and a torsional degree-of-freedom) occurred at substantially lower speeds. The maximum amplitude of the corresponding prototype motion (higher for vertical oscillation) was estimated not to exceed 0.5 percent of B (where B is the width of the bridge deck) for the same damping level. The aerodynamic behavior of the bridge deck was improved by streamlining of the deck geometry

Wind load reduction for heliostats: a subcontract report

CER85-86JAP-NH-BB-JEC4.SERI Technical Monitor: L.M. Murphy.SERl/STR-253-2859, UC Category: 62a, DE86010703.Includes bibliographical references (pages 72-74).May 1986.Prepared under Subcontract No. XX-4-04029-1.Prepared for the U.S. Department of Energy, Contract No. DE-AC02-83CH10093

Wind forces on microwave antennas, equipment and towers

March 1983.Includes bibliographical references.For Bayar and Associates, Structural Engineers.CSU Project 2-95380