In order to accurately analyze the vibration characteristics of the elastic support and cushioning system of precision packaging, A six-degree-of-freedom dynamics mathematical improvement model was proposed to consider the radial stiffness of the transverse spring and the solution verification was completed. Firstly, a six-degree-of-freedom dynamics mathematical model of the elastic support cushioning system was established according to the energy method.Furthermore,the radial stiffness of the transverse spring was described, and the corresponding dynamic correction model was proposed. After that, the fourth-order Runge-Kutta method was used to analyze the vibration characteristics of the precision packaging elastic support and cushioning system under the multiple factors conditions. Some results of the numerical analysis and the comparison were obtained. Finally, the modified theoretical model was verified through multi-factor experiments. The results show that the longitudinal natural frequency of the precision packaging elastic support cushioning system increases with the increase of the transverse spring stiffness and the axial compression force, the vibration response amplitude increases significantly at the resonance point, and the peak point also shifts back significantly. In the actual transportation process, attention should be paid to the selection and adjustment of the lateral spring stiffness and its axial pre-pressure. As a result, it will improve the analysis accuracy of the system vibration characteristics to consider the influence of the radial stiffness of the transverse spring.
Key words
elastic support buffer system /
vibration characteristics /
radial stiffness /
numerical analysis /
experimental verification
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