Abstract
Virtual Point Transformation is a method for estimating vibration characteristics (vibration acceleration, transfer function along 6 degree of freedom) where direct measurement is hard by using directly measured vibration characteristics at the other points and the position. On the other hand, the method is known to be applicable at a frequency band where the target structure vibrates rigidly. Hence estimating the vibration characteristics and obtaining correct contribution at wide frequency band is generally hard. In this study, we considered a combined method of virtual point and operational TPA to estimate the force contribution at wide frequency band. In the method, the blocked force at a virtual point was estimated and the transfer function to the response point was calculated using the blocked force and the vibration in operation. The method was then applied to a simple plate model and the accuracy of the obtained contribution was verified.
