基于微振动监测的AFT厂房结构–浆液耦合振动特性

AFT氧化风机房是脱硫工艺中的一种钢筋混凝土结构支撑钢罐的复合结构，结构产生的明显振动不利于正常生产运营，因此针对AFT结构进行现场监测和模拟计算。首先对AFT结构进行现场调查，基于一种AFT结构视频监测与局部监测相结合的方法对其进行监测，随后又提出简化搅拌机及氧化风作用的模拟方法，通过数值模拟对AFT结构振动特性进行研究。结果表明:对AFT结构进行视频监测可快速明确结构运动轨迹；局部监测结果表明搅拌机作用是结构振动的主要因素，氧化风的鼓入加剧了结构振动响应，因此造成了结构各柱间填充墙不同程度的损伤；将数值模拟结果与监测结果对比，验证了简化搅拌机及氧化风作用的计算方法，可为分析此类结构振动响应、损伤机制以及加固设计提供参考。 

Fluid-structure interaction vibration characteristics of the AFT workshop structure based on micro-vibration monitoring

An AFT oxidation fan room is a kind of composite structure of reinforced concrete structure supporting the steel tank in the desulfurization process. It is a common structural form of a power plant. The obvious vibration generated by the structure is not conducive to the normal production and operation of the power plant and may even cause accidents. Therefore, on-site monitoring and a simulation calculation are carried out for the AFT structure to study the causes of vibration of the AFT structure and clarify its vibration mechanism. First, a field investigation of the AFT structure is carried out combining video monitoring and local structure vibration monitoring. Based on the simulation method of the fluid-solid interaction, a simulation method to simplify the action of the mixer and the oxidation wind in the steel tank is then proposed, and the vibration characteristics of the AFT structure are further studied through the proposed numerical simulation method. Finally, numerical simulation results are compared with the monitoring results, and causes of vibration differences in various parts of the structure are studied. Results show that video monitoring can quickly identify the structure movement track. Local monitoring results show that the mixer is the main factor of the structural vibration, and the aeration of the oxidation wind intensifies the structural vibration response, causing different degrees of damage to the infill wall between the columns of the structure. The dynamic response law of different positions of each column and the upper steel tank of the structure is found to be more different. A comparison of numerical simulation results with monitoring results verified the calculation method of simplifying the mixer and the oxidation wind effect, providing a reference for the analysis of the vibration response, damage mechanism, and reinforcement design of such structures.