Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Jack E. Cermak"'
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. 95:389-410
This paper proposes a random decrement (RD) based method to identify the modal parameters of a linear dynamic system, when only forced acceleration responses are available for use. The RD based method evaluates response data in the time and, then, fr
If one surveys the development of wind engineering, one comes to the conclusion that the challenge of urban climatology is one of the most important remaining tasks for the wind engineers. But what distinguishes wind engineering in urban areas from c
Autor:
Jack E. Cermak
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. 91:355-370
A review is presented on wind tunnels capable of simulating natural winds, the boundary-layer wind tunnel (BLWT), and trends in their extensive use in civil-engineering practice. BLWTs and data-acquisition systems, as they evolved to meet needs in ci
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. :269-281
A 1/12 scale five-story full aeroelastic building model equipped with viscoelastic dampers is designed and tested in a boundary layer wind tunnel to investigate the effectiveness of viscoelastic dampers in suppressing wind-induced building motion. Th
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. :205-215
A current area of research interest is the ability of boundary-layer wind tunnels to accurately model wind pressures on small buildings. The difficulty in modeling occurs, in part, because of the need to model the atmospheric boundary layer at scales
Autor:
Frank Beste, Jack E. Cermak
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. :557-566
This investigation [1] was primarily concerned with the statistics of internal and area-averaged (pneumatic average) external wind pressures on low-rise buildings. The combined effects of internal and external pressure fluctuations are likely to lead
Autor:
Jack E. Cermak
Publikováno v:
Atmospheric Environment. 30:393-401
Criteria for physical modeling of urban area heating and thermally stratified, boundary-layer flows approaching the area are summarized. Flow modeling facilities, boundary-layer wind tunnels and a natural convection chamber, developed at Colorado Sta
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. :505-513
Modelling of low-rise structures in the boundary-layer wind tunnel requires that the investigator focus on the lowest 100 m of the atmospheric boundary layer; the atmospheric surface layer (ASL). Most of the key flow properties in this lowest portion
Autor:
Jack E. Cermak
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. :439-455
Physical modeling has and continues to be the primary source of information for wind-engineering applications. The capability of boundary-layer wind tunnels to simulate essential features of the atmospheric boundary layer makes this possible. Recent
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. 42:1459-1470
The aerodynamic response of a suspended-cable roof over a railway station is examined using a full aeroelastic model in a boundary-layer wind tunnel. The results of the wind-tunnel tests, conducted in thin and thick boundary-layer flow conditions, ar