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针对贫铀叠层板型燃料组件,采用了基于虚拟仪器的软测量方法,在常温、常压下,进行了其在经受冷却剂冲刷时的振动实验。获得了该组件在0～18.8m/s流速下的流致振动动态响应时间域和频率域结果。实验结果表明:燃料组件在流体冲刷下的振动频率包含各种频段,几乎没有主频;组件的行为包含振动和偏移两个方面,偏移量占主要部分,振动量占次要部分;随着流速的增加,燃料组件的振动和偏移不断增加;在整个0～18.8m/s流速范围没有出现流体弹性不稳定的大振幅振动。
For the depleted uranium-lamination fuel assemblies, a virtual instrument-based soft-sensing method was used to test the vibration of the depleted uranium-lamination fuel assemblies under the condition of normal and normal pressure. The vibrational dynamic response time domain and frequency domain results of the module at 0 ~ 18.8m / s were obtained. The experimental results show that the vibration frequency of the fuel assembly under the condition of fluid erosion includes various frequency bands with almost no dominant frequency. The component behavior includes vibration and offset, with the offset accounting for the major part and the vibration fraction being the secondary part. With the increase of the flow rate, the vibration and offset of the fuel assembly increase continuously. There is no large amplitude vibration with instable fluid elasticity throughout the flow velocity range of 0 ~ 18.8m / s.