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通过建立蒸汽发生器干燥器结构有限元分析模型,完成了干燥器结构振动特性分析和气动噪声分析研究。通过振动特性分析确定干燥器内部结构薄弱板部件,对干燥器薄弱板部件进行气动噪声分析研究,包括最大静压和最大压力功率谱密度分析研究,探究干燥器结构在气动噪声载荷下的结构强度及疲劳特性。研究结果表明:干燥器结构主要的薄弱板部件是竖直分隔板和均汽网结构;最大静压值和最大压力功率谱密度研究中,竖直分隔板、均汽网结构和声压力波回传方向板部件最大应力强度出现在均汽网结构位置,但小于限值,满足RCC-M规范要求。
Through the establishment of the finite element analysis model of the steam generator dryer structure, the vibration characteristics analysis and aerodynamic noise analysis of the dryer structure are completed. Through the analysis of vibration characteristics, we can determine the components of the desiccator’s internal structure of the weak plate, and analyze the aerosonic noise of the desiccator’s weak plate, including the analysis of the maximum static pressure and the maximum pressure power spectral density, and the structural strength of the desiccator under aerodynamic noise load And fatigue characteristics. The results show that the main components of the weak plate in the dryer structure are the vertical partition plate and the uniform steam grid structure. In the study of the maximum static pressure value and the maximum pressure power spectral density, the vertical partition plates, the steam grid structure and the sound pressure The maximum stress intensity of the components of the wave return direction plate appears at the location of the steam grid structure but less than the limit value to meet the requirements of the RCC-M standard.