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在主管道接管嘴疲劳分析中,通常采用简化分析和详细分析2种方法。由于安注斜接管嘴结构比较复杂且经受的压力、温度变化较为剧烈,用简化分析法对其进行疲劳分析时,往往过于保守而导致分析结果不能满足规范要求;采用详细分析法进行分析可以减少保守性,但耗时费力。本文采用简化分析和详细分析相结合的混合分析法对主管道安注斜接管嘴进行疲劳分析,既可以减少计算中的保守性又可以节省计算成本。在混合分析中,通过传热特性试验真实模拟流体与接管嘴之间的传热情况,得到用于计算分析的传热特性参数。分析结果表明,考虑流体传热特性因素的混合分析法能够很好地减少计算保守性,是用于主管道安注斜接管嘴疲劳分析的更加实用有效的方法。
In the main pipe nozzle fatigue analysis, usually simplified analysis and detailed analysis of two methods. Due to the structure of the safety miter nozzle is more complex and subject to pressure and temperature changes more intense, simplified analysis of its fatigue analysis, are often too conservative and the results of the analysis can not meet the regulatory requirements; detailed analysis of the analysis can reduce Conservative, but time consuming. In this paper, a simplified analysis and a detailed analysis of a combination of mixed analytic method for the main pipe Ann injection miter nozzle fatigue analysis, both to reduce the calculation of the conservative and can save the computational cost. In the mixed analysis, the heat transfer characteristic between the fluid and the nozzle is simulated by the heat transfer characteristic test to get the heat transfer characteristic parameters for calculation and analysis. The results show that the hybrid analysis method, which considers the heat transfer characteristics of the fluid, can well reduce the computational complexity and is a more practical and effective method for the fatigue analysis of the main pipe miter nozzle.