Floating Raft Vibration Isolation Design and Sensitivity Analysis of Raft Parameters for Pumps in Reactor System

Pump equipment in reactor system is an important source of vibration and noise for marine nuclear power plant. At present, single-layer vibration isolation measures are mostly adopted in practical engineering, and the damping effect is limited. In order to meet the new requirements of vibration and noise control, floating raft isolation technology has been introduced. However, the floating raft isolation technology in the reactor system has just started, and it still stays on a simple raft structure that meets the basic layout and vibration reduction requirements. There is little research on the structural parameters of the raft itself. This article is the first to carry out diversified structural design of raft structures for reactor system pumps. Three different raft structures are proposed and their comprehensive performance is compared. The characteristics of different raft structures are mastered, and parameter sensitivity research is conducted on the plate raft that has good low-frequency vibration reduction effect. The influence of raft stiffness parameters and mass parameters on the vibration reduction effect of floating raft isolation systems is obtained, which provides theoretical support for the selection and design of floating raft structures for reactor system pumps.