Vibration Characteristics Analysis And Experimental Research Of Vibration Damping System In Container For The Transportation Of Precision Equipment

Container transportation is a common form of product transportation.Although the buffer packaging system used in the container plays an important role in ensuring the vibration isolation performance of its product transportation,most products are currently mainly rigidly fixed in container transportation.The transportation of such precision equipment can not achieve a good vibration reduction effect.Therefore,this article takes the vibration damping system in container for the transportation of precision equipments as the research object,introduces the radial stiffness of the transverse spring as the calculation correction parameter,and conducts in-depth research on its vibration characteristics from both theoretical and experimental perspectives,and completes the comparative verification of the theory and experiment.It validates the theoretical correction model proposed in this paper for the research object.First,a six-degree-of-freedom mechanical model was constructed for the vibration damping system in the container for transportation of precision equipment,and the movement position of the installation point was obtained according to the spatial coordinate solution method.On this basis,the energy equation of the system was derived according to the energy method.The system stiffness matrix considering radial stiffness was also obtained.Then,based on the displacement isolation model,the derivation of the forced vibration equation,shock response equation,and transfer function solution of the system's longitudinal single degree of freedom were completed.Secondly,taking satellite transportation requirements as an example,using its two installation methods as working conditions,combined with the established calculation and correction vibration model,the fourth-order Runge-Kutta method was used to solve the obtained system dynamic equations.According to the requirements of satellite vibration,the response analysis of the vibration system under the two working conditions was carried out.The influence of the initial displacement and initial velocity on the vibration characteristics of the system was mainly studied.In addition,considering that the radial stiffness of the spring will change with its compression in the actual process,this paper has carried out calculation and analysis of the forced vibration and shock response of the vibration system of the spring in different compression states.The results show that the greater the lateral compression force,the greater the acceleration response of the system,and the natural frequency of the system increases accordingly.Finally,in order to verify the feasibility of the theoretical method proposed in this paper,relevant vibration test experiments were carried out.Based on the existing vibration test bed,the corresponding test entity model was made,and the signal test system was built based on the LABVIEW software and the corresponding signal acquisition hardware.Through parameter measurement,evaluation of signal-to-noise ratio,frequency indication error and stability,and modal analysis of ITD method,the initial preparation of the test is completed.Subsequently,combined with the theoretical analysis of the working conditions,the sweep frequency test with and without compression was completed,and the corresponding test results were obtained and compared with the theory.The results show that the maximum error between the theoretical calculation results and the test results is only 1.4%.