Simulation of Vibro-Isolation Performance For Sensitive Cargo Transportation on Planforms with Quasi-Zero Stiffness Suspension Under Impact Perturbations

Abstract

uaThis work deals with the theoretical modeling of the vertical dynamics of a specialized vehicle featuring a dual suspension system. Vehicle ride quality is essential for ensuring the safety and comfort of passengers and the protection of sensitive or hazardous cargo. The study focuses on a two-axle vehicle model with a dual suspension system. The first level comprises a traditional suspension with linear stiffness, while the second level features nonlinear quasi-zero stiffness (QZS) characteristics. The research employs a discrete nonlinear dynamic model considers the vertical displacements and angular rotations of the vehicle’s masses. The nonlinear QZS response is modeled to optimize vibration isolation performance under varying load conditions, while damping effects are included via a Rayleigh dissipation function. The integral characteristics of the QZS element are also studied in detail using finite element (FE) computer simulations in a 3D statement. These simulations provide a comprehensive understanding of the mechanical response and stress-strain distribution within the QZS element, validating its performance under real-world conditions. The results demonstrate the influence of the nonlinear suspension characteristics on the vibration isolation performance and load stability. The QZS-based suspension effectively reduces dynamic stresses, particularly under low-frequency excitations, while maintaining structural integrity and operational efficiency.