Single Tube Tower's Failure And Analysis With Wind Load

Single-tube tower is a communications tower which main structure is a large diameter tapered steel pipe.Its structure is simple and easy to install,with high potential for development.With the steady increasement of China's economic and the improvement of scientific and technology,the demand of large-scale machinery required for processing and installation single-tube towers has been met and has been widely applied to various fields.With the large number of single-tube tower applications,its safety assessment has gradually been taken seriously.Based on the relevant design specifications,design principles and material mechanics of single-tube tower,this paper established the mathematical model of theoretical analysis of the mechanical properties and dynamic properties of single-tube tower.The anti-overturning stability,strength,stiffness and wind-induced vibration response under the fluctuating wind load were analyzed and evaluated under the conditions of average wind and fluctuating wind load.It is concluded that the strength,deflection and anti-tipping performance of single-tube tower under wind load meet the design specifications.At the same time,the finite element analysis model was established by using the common finite element software ANSYS co-simulation platform,which verified the accuracy of the above analysis.Then,the wind-induced fatigue under wind-induced vibration caused by the fluctuating wind load on a single tube tower was analyzed.Based on the Miners linear cumulative damage theory,a large number of data were calculated and analyzed by the rain-flow method.And the fatigue life caused by wind-induced.It also can be concluded that the wind-induced fatigue life of single-tube tower is far beyond its design specifications through calculation and simulation.