Structural Strength And Acoustic Analysis Of Laminated Composites

The research on dynamic and static response of composite materials is developed in two parts. One is the composite materials theory and its practice, the other is vibro-acoustic characters of composite materials. Firstly, in static response part, this paper reviews the history of composite materials theory. Then, the theoretical methods and analytic models of laminated composite materials are introduced by the author. Secondly, structural strength analysis of laminated composite materials is presented in detail by using the project structural strength analysis of the sandwich laminate composite materials kuppe (supported by the CSIC-No.701 Research & Development Institute). The author use finite element analysis software ansys to build the model and compute the structural strength characters of it. This result provides some useful references for practical kuppe design. Thirdly, in dynamic response part, the author introduce sound-solid coupled theory and boundary element method. The merits and drawbacks of FEM software ansys and BEM software sysnoise are compared in detail. Then the author presents a new solution by using ansys to calculate the structural response characters and import to sysnoise for acting as the exterior excitation. Finally, the numerical analysis of vibro-acoustic characters of submarine is carried out by using of structural FEM and acoustic BEM. The acoustic characters of the submarine in near field are calculated by ansys and sysnoise for comparison. So, the feasibility and accuracy of numerical result are ensured. This method can also be referred in practical projects in area of sound radiation and noise prediction.