Research On Equivalent Modeling Method Of Honeycomb Panel Structure And Its Application In Solar Array

Honeycomb panel structure is widely used in aerospace,shipbuilding,transportation,construction and other fields due to its high specific strength,specific stiffness and better thermal isolation and impact resistance and fatigue resistance.Due to the complex and variable space environment,a large number of honeycomb sandwich panels are used in the satellite structure.The mechanical properties of the honeycomb sandwich panel structure determine the stability of the entire satellite structure.Therefore,the response analysis of the honeycomb sandwich panel structure is crucial for the design and application of aerospace products.The application of the equivalent modeling method can significantly improve the design and research efficiency of the honeycomb sandwich structure,but only when sufficient simulation accuracy is maintained at the same time can meet the application requirements.It can be seen that the equivalent accuracy of the equivalent modeling method of honeycomb sandwich panels is of great significance for the analysis of the overall structural performance of satellites.In this paper,the mechanical response analysis and experimental verification of the application models of sandwich panel theory,equivalent panel theory(Reissner theory and Hoff theory)and honeycomb panel theory are carried out.The equivalent accuracy of each equivalent modeling method is obtained by comparison.The equivalent theories is applied to the folded state of the single solar panel and the solar array,and the equivalent modeling method with the best simulation effect is verified.The design suggestions are given.It has important engineering practical significance for the application of honeycomb panel and the design of solar array.The main work done in this paper is as follows:(1)Firstly,according to the "Y model" theory,the equivalent parameters of the honeycomb sandwich layer core structure under the conditions of equal wall thickness and non-equal wall thickness are simply derived with reference to the relevant literature.Secondly,the equivalent theoretical basis and hypothesis of sandwich panel theory,equivalent panel theory and honeycomb panel theory are introduced,and the equivalent elastic parameter expressions of the equivalent models based on each equivalent theory are given.(2)The three-dimensional model is established according to the equivalent theoretical parameters,and then imported into Hypermesh to complete the finite element modeling.Then the mechanical response analysis of each equivalent model is carried out by using MSC.Nastran/Patran.The analysis results are compared with the response analysis results of the honeycomb sandwich panel model after model modification by LMS Virtual.Lab,and the equivalent errors of each equivalent theory are obtained.According to the equivalent error,the equivalent situation of the equivalent theories is comprehensively judged.Two theoretical models with higher equivalent accuracy,sandwich panel theory and Hoff theory,are selected for further study.(3)The equivalent theories with high equivalent precision are applied to the solar array single board structure.The modal analysis of the two equivalent theoretical models is carried out.The comparison results show that the simulation effect of sandwich panel theory is better.Then the frequency response analysis and random response analysis are applied to the sandwich panel theoretical model.Compare the results with the test results to obtain the simulation error of the analysis results.Finally,the analysis shows that the equivalent accuracy of sandwich panel theory is higher and the simulation results of mechanical response of veneer structure are more accurate.(4)The sandwich panel theory with the highest equivalent accuracy is applied to the folded state of solar array.Through the comparison of simulation result and experiment result,it is found that the simulation of the dynamic response is good and within a reasonable error range.Modal analysis of the deployment state of the satellite solar array panels can be compared with the design requirements based on the simulation results.(5)The size of the honeycomb section will vary according to the requirements of the application object.Therefore,the effect of the overall structure length to thickness ratio and cell section size on the equivalent accuracy of the satellite panels is studied.The variation trend of equivalent precision is obtained when the size parameters change.It provides a reference for the structural design of satellite solar array panels.