水下燃料组件转运系统耦合振动分析

The stability of fuel assembly transfer system and the reliability of system structure are very important to ensure the safety of fuel assembly in nuclear power plant. In order to obtain the vibration of system during the running process, the dynamic model of coupling system of the beam-truck+link-mass+spring+damping was established. Considering the effect of water, the nonlinear differential equation of the system is derived. The response of the system under different traveling speeds of truck was calculated by numerical algorithm. After comparison and analysis, it is considered that the smaller the truck speed is, the weaker the system vibration is and the more stable it is; due to the static deformation, even when the speed is very low, the basket will still bear a certain lateral force, so it is necessary to pay attention to the strength of the weak part of the basket; the position near the guide rail support is the dangerous position for the basket, and monitoring points can be set here if necessary to ensure the safety of the fuel assembly.