济南Influence of gas holder internal pressure on gas holder stability

In the eigenvalue buckling analysis of the new type dry gas holder, the piston is not considered in the model to discuss the effect of internal pressure on the structure to resist wind load. Therefore, when calculating the buckling of the cabinet under wind load, gravity is not considered to eliminate the interference caused by the cabinet top buckling before the cabinet. The buckling characteristic value of the cabinet under the reference wind load is 2.02. The buckling shape is the local buckling of the windward side of the cabinet. Then the eigenvalue buckling analysis of the structure under the action of high internal pressure is carried out, and the internal pressure is regarded as a constant load, and the buckling eigenvalue of the structure is 2.64.
After considering the effect of internal pressure, the local buckling position of the dry-type gas tank body has changed. Compared with the buckling position without internal pressure, the buckling position of the side plate with internal pressure avoids the position where the structure bears internal pressure. However, this characteristic value is the characteristic value including internal pressure, so it is necessary to constantly change the size of wind load to make the buckling characteristic value be 1, so as to obtain the buckling characteristic value of the structure against wind load. When compiling the APDL statement, the iterative statement can be set to make the buckling eigenvalue of the structure be 1, and the buckling of the structure can be obtained after several iterations.
① In the eigenvalue buckling analysis of the gas tank, the gas tank body is subject to local buckling, and the buckling position is the upper part of the windward side;
② After considering the internal pressure, the buckling position of the structure has changed, and the buckling characteristic value has also improved. It can be considered that the internal pressure is a favorable load for the side plate of the cabinet body within its scope of action. The tension of the internal pressure of the cabinet to the cabinet plate has a certain protective effect on the buckling of the cabinet under the wind pressure;
③ At the low or middle position, because the internal pressure is not applied to the side plate that will buckle locally without considering the internal pressure, the position and load of instability are not different from that without internal pressure.
The above information is the brief introduction of the manufacturer of the gas holder installation. I hope it can help you.