scholarly journals Calculation of dynamic characteristics of a television tower

2020 ◽  
Vol 17 (2) ◽  
pp. 82-84
Author(s):  
E. A. Tormosov ◽  
◽  
A. Yu. Konovalov ◽  
Keyword(s):  
Dynamic Characteristics ◽  
Wind Load ◽  
Outline Shape ◽  
Computer Complex ◽  
Television Tower

The paper considers the calculation of dynamic characteristics of a television tower exposed to wind pulsation. During the investigation, the tower outline shape was changed, as well as the material of the structure, then it was subjected to the wind load using the SCAD ++ computer complex.

scholarly journals Determining internal forces in modular building elements under action wind load

2018 ◽  
Vol 196 ◽  
pp. 02010
Author(s):  
Viacheslav Shirokov ◽  
Alexey Soloviev ◽  
Tatiana Gordeeva
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cross Section ◽  
Dynamic Characteristics ◽  
Wind Load ◽  
Wind Loads ◽  
Bending Moments ◽  
The Finite Element Method ◽  
Calculation Results ◽  
Internal Forces

The research paper focuses on internal forces determination in the elements of modular buildings under wind load. It provides a methodology for determining dynamic characteristics of a building and for calculating wind loads. This method is based on the following assumptions: coupling of the modules elements is rigid; coupling of block-modules with foundations is hinged-fixed; connection of blocks to each other is hinged in angular points; the floor disk in its plane is not deformed. On the basis of these assumptions the authors derived approximate and refined equations for determining forces in modules elements under static and pulsation components of wind load. The equation of bending moments determination in the pillar bearing cross-section is obtained by approximation of the graph of moments variation, calculated for the spectrum of the ratio of the pillar stiffness and the floor beam in the range from 1/64 to 64. The paper further introduces the calculation results of forces based on the proposed methodology and on the finite element method. The calculations were done while taking different values of wind load and different number of storeys in a building (from 1 to 4 floors). The obtained results are similar, the error does not exceed 5%.

scholarly journals Analysis of dynamic characteristics of climbing formwork under wind loads

2019 ◽  
Vol 79 ◽  
pp. 01016
Author(s):  
Shicheng Hu ◽  
Jun Li
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Characteristics ◽  
Calculation Method ◽  
Design Method ◽  
Element Model ◽  
Wind Load ◽  
Bending Effect ◽  
Matlab Programming ◽  
The Finite Element Model

This article took the climbing formwork which constructed on the bridge at a height of 100 meters as the prototype, then established the finite element model and conducted modal analysis. The APDL language is used to load the wind load which is simulated by the Matlab programming then calculated the displacement and acceleration responses of the climbing formwork and further. The results show that the bending effect of the climbing formwork is more obvious. This calculation method of calculating the wind load, improve the anti-wind design method of the climbing formwork.

Analysis of Dynamic Characteristics of 1.5 MW Wind Turbine Tower

2013 ◽  
Vol 313-314 ◽  
pp. 793-796
Author(s):  
Ping Ping Pan ◽  
Chang Zheng Chen ◽  
Shen Bo Yu ◽  
Qiang Meng
Keyword(s):  
Wind Turbine ◽  
Dynamic Characteristics ◽  
Work Load ◽  
Wind Load ◽  
Random Load ◽  
Wheel Load ◽  
Reliability Design ◽  
Rotating Blade ◽  
Wind Turbine Tower ◽  
Complicated Task

The wind turbine tower is to bear wind load and work load which is brought by the rotating blades during operation. Therefore, analysis of dynamic characteristics of wind turbine tower is a complicated task in the wind turbine reliability design. The dynamic characteristic of wind turbine tower plays an important role in its vibration control. This paper presents fluid-structure coupled dynamics equations accounting for the blade wheel load and wind load applying on the tower. By the model analysis, a feasible method for evaluating the dynamic characteristics of wind turbine tower under the wind turbine wind load and the rotating blade random load is obtained. The model is verified in the 1.5MW wind turbine.

Rise Steel Wind-Induced Response Analysis

2014 ◽  
Vol 1006-1007 ◽  
pp. 56-60
Author(s):  
Ya Nan Hu ◽  
Qing Xu ◽  
Guo Qiang Wu
Keyword(s):  
Shear Deformation ◽  
Dynamic Characteristics ◽  
Response Curve ◽  
Time History ◽  
Wind Load ◽  
Induced Response ◽  
Response Analysis ◽  
Response Curves ◽  
Pressure Time ◽  
Fluctuating Wind

Taking a rise steel as a study, study response of the structure to the dynamic characteristics under fluctuating wind load. The results showed that: deformation of structure under the fluctuating wind load is shear deformation; Structural displacement response curve is similar to the curve of the pressure time history. Because of consider different heights the structure of spatial correlation affect, Displacement positions on different floors response curves are differ.

scholarly journals The analysis of dynamic characteristics and wind-induced displacement response of space Beam String Structure

2018 ◽  
Vol 38 ◽  
pp. 03032
Author(s):  
Yong Jian Chen ◽  
Zhen Fa Feng ◽  
Ai Qi ◽  
Ying Huang
Keyword(s):  
Dynamic Characteristics ◽  
Wind Load ◽  
Control Factor ◽  
Main Mode ◽  
Dead Weight ◽  
Initial Stress State ◽  
Displacement Response ◽  
Generation Structure ◽  
String Structure ◽  
Fluctuating Wind

The Beam String Structure structural system, also called BSS, has the advantages of lighter dead weight and greater flexibility. The wind load is the main design control factor. The dynamic characteristics and wind-induced displacement response of BSS are studied by the finite element method. The roof structure of the stadium roof of the Fuzhou Olympic Sports Center is the engineering background. 1)The numerical model was built by ANSYS, by shape finding, determine the initial stress state of structural members such as external cables; 2)From the analysis of dynamic characteristics, the main mode of vibration is the vibration of cables; 3)The wind speed spectrum of MATLAB generation structure is obtained by AR method, the structural response of the structure under static wind load and fluctuating wind load is calculated. From the analysis result, considering the equivalent static wind load of BSS , the design of adverse wind is not safe, and the fluctuating wind load should be taken into account.

Displacement Control Technology on High-Rise Steel Structure about Main Power House of Thermal Power Plant

2014 ◽  
Vol 919-921 ◽  
pp. 72-78
Author(s):  
Huan Qin Liu ◽  
Wei Bin Li ◽  
Kang Ma
Keyword(s):  
Power Plant ◽  
Dynamic Characteristics ◽  
Lateral Displacement ◽  
Thermal Power ◽  
Wind Load ◽  
Steel Frame ◽  
Seismic Action ◽  
Boiler Steel ◽  
Displacement Response ◽  
Finite Element Software

With the background of optimal design study on main powerhouse of Power Plant, the finite element software ANSYS is adopted to control the overall structure's displacement. After the choice of structural form and loads bearing system, the static and dynamic characteristics of this boiler steel frame are analyzed in detail. And the structure's displacement response of this boiler steel frame will also be discussed under permanent load, wind load and seismic action. The structural displacement response causing by four wind load cases (front wind, back wind, left wind and right wind) is emphatically discussed and the dynamic characteristics and response spectrum analysis are also be studied. Results show that this main powerhouse owns good seismic performance and excellent lateral displacement resistance capacity because of the high structure stiffness. It shows that the horizontal displacement of the whole structure under all load cases can meet the requirements of the limit value, which demonstrates the feasibility of this structural program.

Several Issues on Structural Dynamics of Aqueduct Bridges

2013 ◽  
Vol 405-408 ◽  
pp. 1982-1985
Author(s):  
Yu Chun Li ◽  
Hao Zhang
Keyword(s):  
Structural Dynamics ◽  
Dynamic Characteristics ◽  
Fluid Structure Interaction ◽  
Wind Load ◽  
Seismic Resistance ◽  
Seismic Responses ◽  
Fluid Structure ◽  
Structure Interaction

This paper reports several issues on structural dynamics of aqueduct bridges. These issues include the modeling of sloshing water, dynamic characteristics of aqueduct bridges with fluid-structure interaction, seismic responses of aqueduct bridges, wind-induced buffeting responses of aqueduct bridges, equivalent wind load on aqueduct bridges. The results mentioned in this paper can be referred for the investigation and design of the wind and seismic resistance of the aqueduct bridges.

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