Abstract: In order to accurately describe and analyze the response behavior of bolted connection structures in dynamic environments, a simplified dynamic modelling method with the non-slipping area as the effective contact area was proposed. The non-slipping contact area could be obtained by non-linear static numerical simulation. It indicates that the pretightening force of the bolt has little effect on the non-slipping contact area. As a result, the influence of different values of tightening torque and tightening torque coefficient on the modelling precision can be mostly avoided. Furthemore, multi-level modal tests were conducted on typical combined structures from component level to system level. It shows that the experimental results of multi-level modal frequency and vibration mode are in good agreement with the simulation results, thus the proposed modelling method may be applied to the study of product’s dynamic characteristics in the forward design.