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Use of the FRF decoupling method can be used to determine joint parameters for connected systems. The method has been verified to determine stiffness parameter for lumped mass systems and beam elements by the author in his earlier publication. Modal coupling method used to verify generated FRF in a coupled system for simple mass damper system. Sensitivity modes can be used for identifying the most accurate values for stiffness. In this paper, the method is extended to determine the stiffness parameter for a solid element. Though solid elements have only translational degree of freedoms (DOFs), this method can be used to determine rotational stiffness apart from translational stiffness for joint parameter.

Joint parameter determination using FRF decoupling method for connected solid plates