Abstract:

The total vibration structural intensity in a T-shaped connected beam is modeled for a point mechanical noise source located at one end of the horizontal branch of the T-beam. For a point force lying in the plane of the T-beam, only flexural and extensional intensities are included. In order to minimize the total structural intensity propagating into the vertical leg of the T-beam, three control strategies were investigated. These include a point force, a point couple, and a combined point force and couple, where the location of the control actuators were the same for all three strategies. The effectiveness of each strategy is evaluated for control on or off resonances. The total injected power required for control for each control strategy was also evaluated to rate the efficiency of each method.