How strong is the wind and snow resistance of the general membrane structure stands?

1. Determination of fluctuating wind pressure system The displacement of membrane structure under load is relatively large, and the change of structural displacement will have an impact on the surrounding wind field, so the process corresponding to the wind force of membrane structure is a fluid-solid process. The aeroelastic model must be used in the test of this dynamic process, but it is difficult to realize technically and is still in the experimental stage. 2. Determination of the shape coefficient of static wind load The shape coefficient of wind load is an important parameter of uneven wind pressure in the structure. The shape coefficient of general structures can be found from the load specification, but the shape of membrane structures is different and cannot be obtained directly from the load specification. Therefore, large-scale membrane structures basically need wind tunnel tests to obtain more correct local wind pressure coefficient and average wind carrier shape coefficient.

3. Dynamic analysis of wind vibration Wind power can be divided into two parts: average wind and pulsating wind. The average wind period is long, and the general properties of low structure are equivalent to those of decision makers. The period of pulsating wind is relatively short, and the overall use of the structure is dynamic. 4. The aerodynamic instability membrane structure is a wind-sensitive structure, which has the problem of aerodynamic instability. The aeroelastic instability of the structure is essentially due to the energy absorption of the structure during vibration and the modal coupling of airflow. When the absorbed energy is greater than the dissipated energy, energy accumulation will occur. When this energy accumulation reaches a certain value, the structure will change from low-energy vibration form to high-energy vibration form.