由于反应堆流激振动的复杂性,为了得到反应堆结构流激振动响应,目前主要以实验测量为主要研究手段,实验需要获得流体载荷函数。本研究利用反应堆1:1比例模型进行试验,得到反应堆脉动压力数据;并利用相干函数建立了通过脉动压力数据获取随机力载荷的数据处理方法。通过曲线拟合得到作用在反应堆堆内构件上的随机力载荷。获得的随机力载荷可进一步用于反应堆堆内构件的流激振动响应分析。 Due to the complexity of reactor vibration, in order to get the vibrational response of reactor structure, experimental measurement is the main research method. The experiment needs to obtain the fluid load function. In this study, the reactor 1: 1 ratio model was used to test the reactor pulsation pressure data; and the coherence function was used to establish the data processing method to obtain the random force load through the pulsating pressure data. Through the curve fitting, the random force load acting on the reactor internals is obtained. The obtained random load can be further used to analyze the flow induced vibration response of the reactor internals.