曼型干式煤气柜气弹模型设计与模态参数识别

为了设计并制作出满足曼型干式煤气柜动力特性及流体力学相似准则的气动弹性模型，应用背景-共振能量参与系数法对煤气柜结构进行风振响应主要贡献模态识别，分析了模型设计中的主要参数，讨论了质量不相似对模型风振响应的影响，并推导了修正方法.详细阐述了煤气柜气弹模型加工、制作方法，对煤气柜气弹模型进行模态参数识别.结果表明:煤气柜结构风振响应主要贡献模态为前10阶模态；柜体内压对结构振动频率影响较小，一般在5%以内；在煤气柜设计中，仅需模拟柯西数相似即可；质量不相似模型风振响应的修正结果与原型风振响应差别在3%以内，煤气柜气弹模型实测频率、振型特点均满足设计要求. 

Full Aeroelastic Model Design and Modal Parameter Identification of MAN Type Dry Gas Tank

In order to design and produce an aero-elastic model that satisfies the dynamic characteristics of MAN type dry gas tanks and the similarity criterion of fluid dynamics, main contributing modes of the wind-induced vibration of the gas tank are identified using the mode energy participation factors of background response and the resonant response. Then, influencing parameters of the full aero-elastic model design are analyzed. The influence of mass dissimilarity on the wind-induced response of the full aero-elastic model is discussed, and a correction method is proposed. In addition, the manufacture technique of the full aero-elastic model for the Man type dry gas tank is expounded, and modal parameters of the full aero-elastic model for the gas tank are identified by a modal test. The results show that the first ten steps of mode parameters of the MAN type dry gas tank are the dominant contributing modes of wind-induced response; the internal pressure has less than 5% effect on the structural stiffness; it is only necessary to simulate a similar Cauchy number during the model design process; the difference between the corrected wind-induced response influenced by mass dissimilarity and the wind-induced response of the primary structure is less than 3%; and, the measured amplitude-frequency and vibration mode characteristics of the full aero-elastic model meet the design requirements.