基于气动弹性模型的曼型干式煤气柜风致响应风洞试验研究

Wind tunnel test on wind-induced response of MAN-type dry gas tank based on aeroelastic model

为了对煤气柜进行风致响应分析,根据风洞试验相似准则,设计制作了曼型干式煤气柜气动弹性模型,并对煤气柜模型动力特性进行试测。在此基础上,详细分析了煤气柜在不同工况下的风致响应。结果表明:煤气柜气动弹性模型能够准确模拟原型结构动力特性;活塞位置对煤气柜位移响应的影响显著,位移响应最大值发生在活塞处于低位时,迎风面柜体的2/3高度处;试验风速对活塞邻近测点位移响应的影响有限,对与活塞相距较远测点位移响应的影响明显;活塞的存在对柜体风振系数起到抑制作用,但总体而言煤气柜风振系数沿子午向从上至下逐渐增大。结合试验结果给出了煤气柜风振系数计算式。

In order to analyze the wind-induced response of the gas tank,the areoelastic model of MAN-type dry gas tank was designed and manufactured,which was based on the similarity criterion of wind tunnel tests.The dynamic characteristics of the gas tank model were tested.On this basis,through the areoelastic model test of the gas tank,the wind-induced response of the tank in different load conditions was analyzed in detail.The test results show that the areoelastic model of gas tank can accurately simulate the dynamic characteristics of the prototype structure.The position of gas tank piston has a significant effect on the wind vibration response of the cabinet.The maximum displacement response occurred on the windward side at 2 /3 height of the cabinet body when the piston was at the low location.The wind speed has little influence on the displacement response of the measuring points which were close to the location of piston,but had a great influence on the displacement response of those which are far away from the piston.The existence of the piston led to significant reduction of the wind vibration coefficient of the cabinet.Overall, from the top of the gas tank to the bottom,the wind vibration coefficient increased gradually along the meridian. According to the test results,the calculation formula of the wind vibration coefficient of the gas tank is established in this paper.