Abstract
The structure-borne sound in bending waves is well understood, and has been studied by many investigators in ideal beam and plate structures. Such studies typically employ finite differencing techniques to estimate the shear, bending, and twisting components of intensity, and are therefore only applicable to simple homogenous uniform structures such as thin plates and beams. This paper derives the method to compute the approximation structural intensity in the general thin plate structures. This method uses projection of bending displacements on the structure to virtural plain and finite differencing techniques on the plain. The results of this method are validated comparison with structural intensity without approximation in a cylindrical shell plate.
