This study presents the design and validation of a chassis made from AISI 1040 steel for unmanned electric street sweepers, focusing on its structural response to standard road humps in urban environments. Finite element analysis (FEA) was conducted in Altair Inspire, and dynamic simulations were performed in MATLAB Simulink to evaluate both static and regulatory dynamic loads, including speed bump impacts. A diagonal suspension system was integrated to improve load distribution, reducing deformations by 22% compared to conventional configurations. Modal analysis revealed three critical vibration modes (50.33 Hz, 69.85 Hz, and 78.11 Hz), each with effective mass participation above 15%, informing structural reinforcements. Dynamic simulations confirmed that the proposed chassis design maintains high structural integrity under transient urban loading scenarios, with stress levels significantly below the elastic limit of AISI 1040 steel. Leveraging meshless finite element analysis and quarter-car dynamics, the structure proved resilient to road-induced impacts, ensuring durability, minimal deformation, and adaptability.