振動測定からみた鋼製煙突設計上の諸問題

Abstract

The steel stack vibrates always under the action of wind, but the complete informationon its dynamic behavior has not been yet obtained. This paper sets forth the winfi forcesacting on the stack. In general, the external wind forces applied on the stack will dependon the movement of the stack relative to the wind flow. From this point of view, we in-vestigated the results of many experiments on actual gunnite-lined, all-welded steel stacksand models, which had been made by many researchers, and we made a few experiments.After that, we obtained the conclusion that the* vibrational movement plays an importantrole for the wind forces. Some notes on the design of stacks are shown at the end of thispaper.