大型曼型干式煤气柜结构的抗风设计理论研究

Man type dry gas storage tank is a kind of important and superhuge structrue, which is usually used to store combustible gases, save resouces and protect enviroment. Those type of tanks are widely used in metallurgical, petrochemical, municipal and other industries. The main research object of the project is to develop the wind design theory of large Man-type dry gas tank structures. There are lots of topics to discuss, involving the dynamic character considering the internal piston movement, the buckling problem under the static wind and dynamic wind loads,the shape coefficient and the equivalent wind load of thin-walled structures, the gas tank aeroelastic model design method, simplifid large gas tank calculation method about wind loads which is suitable for the engineering design, etc. Based on existing large gas tank construction projects, theoretical analysis, experimental studies, numerical simulation and other means are employed to analyze vibration response of large Man-type dry gas tank due to wind loads. The reliable, valid theoretical basis will be developed to design this type of structure. Therefore, this project has important theoretical significance, value and social and economic benefits.

曼型干式煤气柜是一种储存可燃气体、节约能源和保护环境的大型、重要构筑物，广泛用于冶金、石化、市政等行业。本项目以大型曼型干式煤气柜结构的抗风设计理论为主要研究目标，主要研究内容包括曼型干式煤气柜结构考虑内部活塞运动的结构动力特性及其在静风和动力风荷载下的屈曲失稳问题、煤气柜薄壁结构体型系数及等效风荷载、煤气柜薄壁结构气动弹性模型设计方法、适用于工程设计的大型煤气柜简化抗风计算方法等。本项目拟依托于现有大型煤气柜工程建设，综合运用理论分析、试验研究、数值模拟等各方面手段，率先开展针对大型曼型干式煤气柜结构的风振响应研究工作，为煤气柜结构的抗风计算提供可靠、有效的理论依据。因此，本项目具有十分重要的理论意义、应用价值和社会经济效益。

曼型干式煤气柜属于大型空间薄壁组合壳体结构，其动力特性并不确定，对风荷载比较敏感，且其屈曲和稳定特性比较显著。本项目围绕大型曼型干式煤气柜结构的抗风设计理论展开研究，主要研究了考虑活塞处于不同高度位置的结构动力特性及其在静风作用下的屈曲和稳定问题、煤气柜表面风荷载体型系数的计算方法、高雷诺数下粗糙度对圆柱绕流特性的影响、煤气柜刚性测压试验、煤气柜结构在各典型工况下的风振响应、线性滤波自回归模型法对风荷载模拟的改进方法、煤气柜结构气动弹性模型设计方法、曼型干式煤气柜结构的风振系数计算方法；煤气柜内压作用下的弯曲变形，柜体、柜顶和活塞结构的线性屈曲和非线性屈曲与稳定的缩尺模型。本项目依托东南沿海现有大型煤气柜实际工程，采用理论分析、试验研究和数值模拟相结合的方法，对大型曼型干式煤气柜结构的风振响应、屈曲与稳定进行了系统的研究，所获得结论和提出的方法，为煤气柜结构的抗风设计和规程编制提供了有益的参考。