LES of Unsteady Aerodynamic Forces on a Long-Span Curved Roof

Ding, Wei

doi:10.5772/intechopen.70880

Cited by 1 publication

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main body of a skeleton membrane structure is a steel member or various types of material support as a spatial structural support, whereas the membrane material is covered on the support as an envelope structure, so that the membrane material and the skeleton form a jointly stressed structural system. Most membrane materials have the characteristics of lightness, softness, low stiffness, and damping, while exhibiting significant geometric nonlinearities [3]. The pulsating wind has the characteristic of changing randomly over time, so when the vibration frequency of the structure is close to the natural frequency of the membrane structure, resonance will occur and the membrane structure under the pulsating wind load is prone to wind vibration [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Fluid Vibration Analysis of Large-Span Skeletal Membrane Structures under Pulsating Winds

Yang

Jia

2023

Advances in Civil Engineering

View full text Add to dashboard Cite

To identify the location of the strongest vibration of skeletal membrane structures under pulsating wind and predict the response and damage of the structures. To guide engineering reinforcement, base on the platform of ANSYS Workbench as a platform, the complex skeleton membrane structure is first simplified using the modal fitting method, and the error of the 30th-order frequency of the membrane structure before and after the simplification is calculated to be less than 5% compared to the unsimplified model. Based on the simplified model, the unidirectional coupling and bidirectional coupling methods were compared using the surface averaging wind pressure distribution parameters of the membrane structure. The results show that the extreme value and extreme difference of the averaged wind pressure of the bidirectional coupling are larger than those of the unidirectional coupling under the same wind angle, which verifies the reliability of the vibration analysis of the large-span membrane structure under the bidirectional coupling. By analyzing the wind pressure coefficients at the key measure points, it can be seen that the structure is in unfavorable working condition at the wind angle of 0°–45°. Based on the bidirectional coupling method, the maximum displacement time variation curve, maximum acceleration time variation curve, and maximum equivalent force time variation curve for different wind direction angles are basically the same, and the membrane structure gradually equilibrates with time, and the maximum instantaneous displacement, maximum instantaneous acceleration, and maximum equivalent force all reach the maximum at wind direction angle 30° and the minimum at 90°.

show abstract