Equivalent Modeling Method and Experimental Verification of Honeycomb Sandwich Panels

In this paper, the sandwich panel theory of honeycomb sandwich panel is applied to the finite element model of solar wing veneer. The equivalent mechanical parameters are extracted by its equivalent calculation equation, and then the model of solar wing veneer is completed by applying specific boundary conditions. The dynamic analysis of the solar wing veneer structure is carried out, and the first 5 order modal frequencies and their vibration nephogram are obtained. The modal frequency and mode shape of the test are obtained by modal test of the solar wing veneer. Comparing the simulation results with the experimental results, it is found that the first five-order modal frequency error is less than 11 %, and the simulation results are in good agreement with the experimental results. The results show that the equivalent accuracy of sandwich panel theory is very high, and the design and analysis time can be saved in the allowable calculation error range, which provides important support and reference for the honeycomb structure design of solar wing. Introduction Honeycomb sandwich plate is a kind of multi-purpose structural material with a wide range of applications, and the hexagonal aluminum honeycomb sandwich panel with complex geometry is the most common honeycomb sandwich panel. Due to the high specific strength, specific stiffness and good thermal isolation and impact resistance, fatigue resistance, the advantages of honeycomb sandwich structure is widely used in aerospace, shipbuilding, transportation, construction and other areas [1-2]. Based on its good mechanical properties and the characteristics of lose weight easily, some satellite almost all the main load-bearing structure consists of honeycomb sandwich plate structure, under normal circumstances, the honeycomb structure quality can be 80-90% of the whole satellite board structure. Current engineering software, such as ABAQUS, Nastran and other cellular structure unit, so in containing complex structure of the honeycomb sandwich plate can only be used when numerical analysis of three-dimensional entity model or equivalent plate model [3].The calculation precision of the 3d solid model is high, but the calculation is huge. The equivalent plate model is small in calculation and widely used. At present, the equivalent plate model of honeycomb sandwich plate has sandwich panel theory model, equivalent plate theory model, honeycomb plate theory model, etc. At present, plenty of research results show that, in the numerical simulation, sandwich plate theory has the highest equivalent precision, which is in good agreement with the original model [4-5]. If the results compared with the test results to verify that is the equivalent of a more scientific and reliable, dynamics calculation for honeycomb sandwich plate component containing the choice of the equivalent plate model is of great significance.