Research on Vibration-induced Noise Simulation of Main Control Room of High-temperature Gas-cooled Reactor
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摘要: 主控室噪声是核电厂运行安全关注的重要问题之一。本文基于结构有限元模型和声学边界元模型，探究主蒸汽管道振动对高温气冷堆主控室内噪声的影响。建立了某高温气冷堆概念设计核岛厂房的频响分析有限元模型与主控室频域声学边界元模型，预测结构传递主蒸汽管道振动主导的主控室噪声水平；探究不同主蒸汽管道对主控室内声压级的影响规律，并基于声学贡献量分析，识别对主控室噪声贡献最大的墙壁振动；提出了通过物理隔断进行主控室振动噪声优化的方法。结果表明，主蒸汽管道水平振动在主控室内产生的噪声高于竖直振动；主蒸汽管道振动引起的最大噪声超过60 dB；主控室靠近主蒸汽管道隔离阀间的墙壁与天花板对室内噪声的声学贡献量最大；通过物理隔断可大幅降低主控室内部噪声水平。Abstract: Noise in the main control room is one of the major concerns for operational safety of the nuclear power plant. In this paper, the impact of the main steam pipeline vibration on the noise level in the main control room of the high temperature gas-cooled reactor (HTGR) is investigated by using a structural finite element model and an acoustic boundary element model. A finite element model for frequency response analysis of the nuclear island of one HTGR conceptual design, and a boundary element model for acoustic analysis of the main control room in the frequency domain, are established respectively, to predict the noise levels in the main control room dominated by vibration transfer from the main steam pipelines. The influence patterns of various main steam pipes are explored, and the wall vibration that contributes most to the noise level of the main control room is identified based on acoustic contribution analysis. A method for optimizing the main control room noise through physical partitioning is proposed. The results show that, horizontal vibrations of the main steam pipeline generate higher noise levels in the control room compared to vertical vibrations. The maximum noise caused by the vibration of the main steam pipeline exceeds 60 dB. The walls near the main steam isolation valve room and the ceiling contribute the most to the indoor noise in the control room. Through physical partitioning, the noise level of the control room can be reduced significantly.
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图 3 $ {a_{{\mathrm{HTGR}}}} $随频率的变化
Figure 3. $ {a_{{\mathrm{HTGR}}}} $ Varying with Frequency
图 5 施加不同方向激励A计权声压级对比
Figure 5. Comparison of A-weighted Sound Pressure Levels When Excitation is Applied in Different Directions
图 6 不同管道在5#测点处的A计权声压级曲线
Figure 6. A-weighted Sound Pressure Level Curves of Different Pipelines at 5#
图 7 5#测点A计权声压级随管道与主控室的距离的变化
Figure 7. Variation of A-weighted Sound Pressure Level with the Distance between the Pipe and the Main Control Room
图 8 管道同时振动时不同位置的A计权声压级曲线
Figure 8. A-weighted Sound Pressure Level Curves at Different Positions When the Pipeline Vibrates Simultaneously
图 10 不同中心频率时各板块声学贡献量
Figure 10. Acoustic Contribution of Each Panel at Different Central Frequencies
图 12 采用隔离结构前后A计权声压级对比
Figure 12. Comparison of A-weighted Sound Pressure Levels before and after Using Isolation Structure
表 1 板块编号
Table 1. Panel Number
板块编号 板块 1 主控室外墙 2 靠近主蒸汽隔离阀间墙壁 3 主控室内墙 4 远离主蒸汽隔离阀间墙壁 5 主控室天花板 6 主控室地板 
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