There are two methods commonly used to determine the effectiveness of a bullet-resistant door: one involves the use of sensors attached to various locations to detect cracking following impact and the other employs software simulations. In this study, we utilized the finite element method (FEM) analysis software MSC.Patran to perform stress analyses on a designed bullet-resistant door, subjecting it to various external forces. Utilizing the FEM simulation method eliminates the need for attached sensors to detect the effects of impacts. The focus is on developing a shock-loaded door that can withstand various impacts with minimal visible damage or deformation. In this study, we primarily examine the effects of different impacts on a designed bullet-resistant door through simulation using MSC.Patran’s FEM. The software was employed to simulate and compute stress and displacement distributions, as well as the response force of the entire door structure, while assuming various conditions such as steel structure, welding strength, and material, among others, under different impact conditions. The impacts were generated by a 125 kg and 8 inch armor-piercing projectile, a car, or a solid steel ball, and an earthquake with a magnitude of roughly 6.4 was added to the stress conditions to analyze and simulate the stresses. The results of different impacted objects were discussed. The findings revealed that, under the aforementioned conditions, the designed door structure could effectively withstand external impacts without damage. On the basis of the analysis results, it was determined that the steel panel, steel structure, and latch of the bullet-resistant door were capable of resisting the combined impacts of the specified foreign objects.