Modal and Wind Vibration Analysis about Steel Chimney Outer Wall with a Spiral Guide Plate Based on Workbench

Abstract

This paper analysis a steel chimney outer wall with a spiral guide plate. Through calculation the steel chimney structure modal, self-vibration and wind vibration frequency verify this steel chimney can reduce the wind load impact on the chimney and flange connection. Achieve a method of improved the strength of chimney structure. The chimney under wind load resonant frequency band is reduced effectively and obtained a more stable exterior structure, offered basis for steel chimney transform in wind vibration problem.

Frequency Analysis of Steel Chimneys Using the Finite Element Method

“…From the results it was decided to turbulizers and mechanical vibration dampers were utilized to reduce the sizeable chimney vibrations due to aerodynamic phenomena induced. Deng et al [2] assessed a spiral guide plate-equipped steel chimney outer wall. Through computation of the modal, selfvibration, and wind vibration frequency, it was confirmed that the steel chimney can lessen the influence of the wind load on the chimney and flange connection.…”