## 1 Introduction
[23] used the three-dimensional time-domain boundary element to represent soil, ballast, and structure, and proposed a general numerical model that can analyze soil movement caused by train running; [PERSON] et al. [24] proposed a vertical coupling model of train track tunnel soil, and studied the train dynamic response law; [PERSON] et al. [25] studied the propagation law of dynamic response of train load in surrounding soil based on test and numerical simulation; [PERSON] et al. [26] proposed a concrete constitutive model under uniaxial cyclic loading considering the fatigue damage of concrete, and studied the cumulative damage of tunnel crossing structures when trains are running; [PERSON] et al. [27] studied the fatigue damage caused by the train to the three-dimensional cross tunnel in the long-term running process; [PERSON] et al. [28] considering the axle load and unsprung mass of the car body, studied the dynamic response law of the heavy haul train to the tunnel; [PERSON] et al. [29] analyzed the vibration response law of subway train load to shield tunnel structure from the perspective of displacement, velocity, and acceleration based on three-dimensional dynamics. The dynamic response of underground structures to ground vehicle-induced vibration is rarely studied. Grey correlation analysis was proposed by Professor [PERSON] [30]. This method is used to find the factors that have the greatest impact on the target factors by calculating the main relationship between the target factors and the corresponding factors. By quantifying the relationship between them, it can quantitatively explain the interrelationship between the change factors and the corresponding factors [31]. [PERSON] et al. [32] analyzed many factors affecting pavement damage based on grey correlation analysis method. [PERSON] et al. [33] studied the impact of traffic flow, alignment, and sign information on drivers' behavior based on the gray correlation method. The grey correlation method is an uncertainty analysis method, which is very suitable for finding the main influencing factors in some uncertain factors. According to the previous contents, previous studies mainly involved the influence of vehicle load on settlement and the vibration of the tunnel caused by vehicle load in the underground tunnel. The influence of ground vehicle load on the vibration of underground buildings is rarely studied, especially the influence of ground vehicle load on the vibration of underground civil air defense construction under construction. In order to study the impact of vehicle load on the vibration of underground civil air defense construction, this paper takes the civil air defense construction at the intersection of Zhongzhou Middle Road and Shachang South Road in Luoyang City as the study subject, based on the field measurement, the author uses the ANSYS numerical software to conduct a transient analysis, and studies the influence of vehicle load on the civil air defense construction vibration when the influence factors such as the elastic modulus of concrete, the thickness of overburden layer, the density of soil layer, the elastic modulus of soil layer, vehicle speed, and vehicle mass change through the sensitivity analysis method of grey correlation.