反应堆压紧弹簧的仿真与参数灵敏度分析

Simulation and sensitivity analysis of reactor hold-down spring

为保证反应堆压紧弹簧的强度,针对压紧弹簧实际工作中所受的最大热应力进行了研究。基于压紧弹簧的实际工作情况,进行了热应力仿真,并通过拟合响应面模型、蒙特卡洛模拟仿真等方法得到了压紧弹簧的最大热应力分布特征,利用参数化建模的方法得到了压紧弹簧尺寸参数对最大热应力的影响情况。结果显示,设计制造时通过提高弹簧的内径和弹簧中部高度,减小弹簧的外径,并在工作过程中控制压紧载荷,可以保证压紧弹簧的强度可靠性。

To ensure the strength of the reactor hold-down spring,the maximum thermal stress of the hold-down spring in practical work is studied.Based on the actual working condition of the compression spring,the thermal stress simulation is carried out,and the maximum thermal stress distribution characteristics of the compression spring are obtained by fitting the response surface model and Monte Carlo simulation,and the influence of the size parameters of the compression spring on the maximum thermal stress is obtained by using the parametric modeling method.The results show that the strength reliability of the compression spring can be ensured by increasing the inner diameter and the middle height of the spring,reducing the outer diameter of the spring,and controlling the compression load in the working process.