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Structural Strength and Acoustic Analysis of Laminated Composites

Author: ChenWang
Tutor: LiuTuGuang
School: Huazhong University of Science and Technology
Course: Design and manufacture of ships and marine structures
Keywords: Composites Static and dynamic response Structural strength Noise and vibration Finite Element Method
CLC: TB33
Type: Master's thesis
Year: 2005
Downloads: 399
Quote: 1
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Abstract


The dynamic composite structures static response study commenced two parts , including the strength of the theoretical and practical part of the composite plate and shell structures and composite structure acoustic performance analysis section . First , the static response analysis of composite structures , the paper reviews the history and progress of the composite shell theory , detailed discussion of modern engineering to use more composite sandwich panels , laminates, sandwich shell structure The theoretical analysis of the methods and models . Second, the structure test model of the new composite shroud around 701 Institute of China Shipbuilding Industry Corporation commissioned the project commenced , the application of the finite element software , simplified mechanical analysis model , the structural strength of the performance of the composite shroud calculation and comparison analysis , get some meaningful conclusions , and provide a reference for the design of the shroud . Laminated composite structural strength of the board is not involved in the project , the paper also supplement given specific examples and additional source to enhance its usefulness . Then, the dynamic response analysis , carried out on the the Acoustic Coupling sound field theory and boundary element method briefly introduced and discussed in detail in the composite structure during ansys software based on the finite element method and boundary element method based sysnoise software the underwater structure acousticst forecast the advantages and disadvantages of each . On this basis , we propose a new computing ideas and methods , that is, using the finite element method to calculate the vibration characteristics of the complex structure as the boundary of the acoustic BEM excitation conditions , to achieve joint calculations . Finally, low frequency noise and vibration problems for composite materials , in accordance with the joint calculation of ideas at the same time using the finite element method and boundary element method for underwater structure vibration noise prediction , and a detailed comparison of their calculations and feasibility studies the feasibility of the two methods and accuracy . The practice shows that this method for solving practical engineering more complex structure of the acoustic radiation better practicality and accuracy of calculation of the structure of the noise and vibration problems or fluid-structure interaction state prediction problem for the accurate calculation of acoustic radiation provides certain reference.

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials
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