Free and forced vibration behaviour of cooling towers subjected to wind loading
Abstract eng: It is essential to understand the free and forced vibration behaviour of cooling towers in response to shell geometry changes when considering their dynamic analysis. In this paper, a linear eigenvalue vibration analysis is presented for various cooling tower shell geometries and free vibration responses (natural frequency and mode shape) are observed. The shell is subjected to increasing wind frequencies of the same speed, and the response frequency observed, as the characteristic geometric parameters of the shell are systematically varied through the practical range for industrial cooling towers. The natural frequency, response frequency and corresponding bandwidths for the first ten modes reduce with increasing shell height. There is a critical height (170 m) above which the response frequency is directly proportional to the shell height. Dwarf cooling towers have narrower natural frequency bandwidths than slender cooling towers. Changing the shell diameter and thickness parameters does not affect the shell’s top-edge response. The results may be used for preliminary design of cooling towers against wind-induced vibration.
Contributors:
Publisher:
Taylor and Francis Group, London, UK
Conference Title:
Conference Title:
Sixth International Conference on Structural Engineering, Mechanics and Computation
Conference Venue:
Cape Town, South Africa
Conference Dates:
2016-09-05 / 2016-09-07
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-09-20, last modified 2016-09-20
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