In order to study the influence mechanism of inertial mass on the vibration pattern and amplitude-frequency characteristics of the energy-fed suspension system with 2-leg parallel mechanism,this paper carried out the theoretical derivation and simulation analysis of the model architecture,system vibration patterns and amplitude-frequency characteristics.The key problem solved in the model architecture was the theoretical derivation of inertia mass and linearization equivalence of inertial mass,laying the groundwork for studying its impact on the vibration mode and amplitude-frequency characteristics of the suspension system..The concept of inertial mass ratio coefficient was proposed to transform the inertial mass into a linearized variable,so as to quantitatively analyze its effects on the vibration patterns and amplitude-frequency characteristics of the system.The results show that the influence of inertial mass on the system is two-fold.From the perspective of vibration pattern,the inertial mass advances the resonance frequency of the 2-leg parallel mechanism energy-fed suspension system.With the increase of the inertial mass ratio coefficient,the amplitude of the body vibration increases.From the perspective of amplitude-frequency characteristic analysis,with the increase of inertia mass ratio coefficient,the body vertical acceleration and suspension dynamic deflection amplitude-frequency characteristic function both appear obvious difference after the second wave peak.Vehicle body vibration intensifies,while the suspension dynamic deflection vibration decreases.Combined with the weighting method and Matlab+Isight joint simulation,it can be seen that:through the reasonable design of 2-leg energy-feeding suspension structure to control the inertia mass ratio coefficient at 0.58,the weighted sum of body vibration and wheel vibration is minimized,the vibration isolation effect is optimal.
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