The Reissner sandwich plate theory was applied to predicting the natural frequencies and modal loss factors of constrained damping structure.As the basic hypothesis of the Reissner theory was excessively simplified leading to lower computed accuracy,the method of predicting the natural frequencies and the modal loss factors of constrained damping structure was improved.The improved computing result is fairly close to that of the Ansys.The improved Reissner method is fit for calculating the natural frequenci...
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