During exploitation, motor vehicles are exposed to vibrational loads that cause fatigue for users and material fatigue of their components. Therefore, vibrations must be studied at the earliest stage of design, using mathematical models, experiments, or a combination of both. Generally, there are idealizations during theoretical analysis, particularly concerning operating conditions and the interrelationships of motor vehicle components. This paper attempts to develop a method for identifying actual loads in continuous vehicle systems in exploitation conditions, based on recorded spatial vibrations. Multi-parameter frequency analysis was used for 2D, 3D, and 4D Fourier transformations. An illustration of the application of these procedures was carried out on idealized continuous vehicle elements such as bars, membranes, and parallelepipeds.