Method for calculating natural frequency of honeycomb sandwich plate
A technology of honeycomb sandwich panels and natural frequencies, which is applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as complex equation form and solution process, difficult solution by analytical method, and many displacement functions
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[0062] The present invention will be further described below in conjunction with drawings and embodiments.
[0063] A method for measuring and calculating the natural frequency of a honeycomb sandwich panel, the specific steps are as follows:
[0064] 1) Use a composite material universal testing machine to measure the sandwich panel to be tested to obtain the bending stiffness of the sandwich panel D 11 , D 12 , D 22 , D 66 and core layer in x - z with y - z In-plane shear modulus G xz , G yz ;
[0065] 2) Use a ruler to measure the length a, width b, and thickness of the sandwich panel of the panel to be tested t and core thickness h ;
[0066] 3) via the formula with , to calculate the shear stiffness of the core layer C xz with C yz ;
[0067] 4) Check the panel density of the splint to be tested through the material manual and core density , by the formula Calculate the equivalent areal density of the plywood ;
[0068] 5) Substitute th...
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Abstract
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