Study the vibration and dynamic response of the dipole girder system for CSNS/RCS

TL;DR

This study investigates the vibration characteristics and dynamic response of the dipole girder system in CSNS/RCS, combining theoretical and experimental methods to improve understanding of its dynamic behavior under operational conditions.

Contribution

The paper introduces a combined theoretical and experimental approach to analyze the dynamic characteristics of the dipole girder system, including the effects of vibration isolators and support configurations.

Findings

Modal parameters identified for the system with and without vibration isolators.

Dynamic response analysis reveals the impact of support point configurations.

Vibration isolators significantly influence the system's modal properties.

Abstract

China Spallation Neutron Source is a high intensity proton accelerator based facility, and its accelerator complex includes two main parts an H- linac and a rapid cycling synchrotron. The RCS accumulates the 80MeV proton beam, and accelerates it to 1.6GeV, with a repetition rate of 25Hz. The dipole of the CSNS RCS is operated at a 25 Hz sinusoidal alternating current which causes severe vibrate. The vibration will influence the long term safety and reliable operation of the magnet. The dipole of the CSNS RCS is an active vibration equipment which is different from the ground vibration accelerator. It is very important to design and study the dynamic characteristics of the dipole girder system. This paper takes the dipole and girder as a specific model system, a method for studying the dynamic characteristics of the system is put forward by combining theoretical calculation with experimental testing. The modal parameters with and without vibration isolator of the dipole girder system are obtain through ANSYS simulation and testing. Then the dynamic response of the system is calculated with modal analysis and vibration testing data. The dipole girder takes four-point support system which maybe appears over constrained in the progress of adjustment. The dynamic characteristics and dynamic response of the three point girder system were studied with the same method.