Abstract
In this paper, in order to find the impact of sandwich plates at natural frequency changed with its geometric and physical parameters, we deduced free vibration equation derived sandwich panels. We took the hexagonal honeycomb sandwich plates as example, and derived natural frequencies for each for use in the modeling and modal analysis, and then discussed the effect of skin thickness, core spacing and core height on the natural frequency of honeycomb sandwich plates. The result shows that the honeycomb sandwich plates have great rigidity, and compared to other parameters, the change of core height has a greater impact on the natural frequencies of honeycomb sandwich plates. When the surface thickness of quadrilateral honeycomb sandwich plates becomes thicker, its natural frequency increases with increasing length of core grid. When sandwich mesh length reaches a certain level, the natural frequency increased firstly and then decreased. When the sandwich mesh length is longer enough, the frequency decreased with the increase in the length. When the core height increased, the natural frequency increased. When the quadrilateral mesh becomes longer, its natural frequency appears to decline after the initial increase. The influence of geometric parameters on hexagonal honeycomb sandwich plates is same as on quadrilateral honeycomb and other soft sandwich plates. Later experiments confirmed some of above conclusions.
Highlights
Composite laminate structures for static, dynamic theoretical analysis and computing applications, as well as viscoelastic polymer material in sandwich plates and shell structures, use a special method in mechanics applications
Fluid-structure interaction enhances the performance of sandwich plates relative to solid plates under intense air shocks, Ashkan Vaziri investigates two methods for applying the loading to the sandwich plate [8, 9], responses are contrasted for loads applied as a time-dependent pressure history versus imposition of an initial velocity
Data from the above two tables shows that the change in sandwich core height on a hexagonal honeycomb sandwich panel plate could help calculate the variation in the firstorder natural frequency; we could draw a side length change on a hexagonal honeycomb sandwich plate
Summary
Composite laminate structures for static, dynamic theoretical analysis and computing applications, as well as viscoelastic polymer material in sandwich plates and shell structures, use a special method in mechanics applications. The new results enable the structural analysis to be decoupled from an analysis of shock propagation in the air [6]. The study complements the prior work on the role of fluid-structure interaction in the design and assessment of sandwich plates subject to water shocks [7]. Square honeycomb and folded plate core topologies are considered. Fluid-structure interaction enhances the performance of sandwich plates relative to solid plates under intense air shocks, Ashkan Vaziri investigates two methods for applying the loading to the sandwich plate [8, 9], responses are contrasted for loads applied as a time-dependent pressure history versus imposition of an initial velocity
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