核电环行起重机抗震分析模型动力学验证OA

As primary hoisting machinery in nuclear power plants,nuclear polar cranes must satisfy both operational strength requirements and seismic safety standards.Regardless of whether spectral or time-history analysis is employed,the structural simplification adopted in the dynamic simulation model must faithfully reproduce the dynamic characteristics of the actual crane,a critical prerequisite for ensuring the accuracy of seismic assessment.In the current research,a specific nuclear polar crane model was investigated.The dynamic simulation modeling methodology is presented,and finite element-based modal analysis was conducted to extract the crane's natural frequencies.The simulation results were validated against field-measured natural frequencies obtained under various operating conditions,confirming the fidelity of the established model.This work illustrates the procedures for constructing simulation models and performing on-site modal testing of large-scale equipment.Research findings provide experimental validation of seismic analysis models for nuclear polar cranes and offer a practical reference for the seismic evaluation of similar hoisting systems.