Effect of dynamic wind loads on compliant towers

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:55701

Chen, C Y; Will, S ^[1]

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1. Hudson Engineering Corp., Houston, TX (United States)

Traditionally, the calculation of wind loads for offshore structures has been carried out using equivalent static loads applied on the deck. For compliant towers with a long natural period of vibration, the importance of the low frequency wind turbulence can become significant. This paper presents results of an investigation into the effects of dynamic wind loads on compliant tower responses. The investigation results indicate that the impact of using dynamic wind loads (based on a one-hour average wind speed with gust fluctuation) would be a reduction in dynamic tower responses when compared to those due to the static wind (based on a one-minute average wind speed) superimposed on the waves. Dynamic response reductions in the order of 5 to 8 percent may be realized from the dynamic wind loads. Hence, the use of equivalent static wind loads may overestimate the wind load contribution, although the overestimate may not be significant. Wind tunnel model tests may be necessary to further confirm this finding.

• OSTI ID: 55701
• Report Number(s): CONF-940230--; ISBN 0-7918-1264-2
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DYNAMIC LOADS
MATHEMATICAL MODELS
MECHANICAL VIBRATIONS
OFFSHORE PLATFORMS
RESPONSE FUNCTIONS
WIND LOADS