Abstract：The topology optimization model is established to obtain an optimized layout of constrained layer damping material on the plate with Passive Constrained Layer Damping (PCLD) treatment. The maximum of modal loss factor is considered as the objective function to enhance damping dissipation of this plate. The volume fraction of constrained layer damping material is selected as constrained condition in the model. The sensitivity of the objective function to design variables is deduced by using the modal strain energy method. The Bi-directional Evolutionary Structural Optimization (BESO) method is proposed to search the optimized layout of constrained layer damping material. The numerical example is illustrated to demonstrate the effectiveness of the proposed BESO method. The results are compared with that from the conventional Evolutionary Structural Optimization (ESO) method. It is demonstrated clearly that the proposed BESO method can achieve higher modal loss factor for the plate with PCLD treatment than conventional ESO method through an optimized layout of constrained layer damping material on the plate. The damping dissipation of the plate is enhanced and the effectiveness of the proposed BESO method is thus identified.
2014, Vol. 33 
