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Hydro-Acoustic Signature Prediction for Submarines

ABSTRACT第5-8页
Table of Content第9-16页
LIST OF FIGURES第16-22页
SECTION'A'第22-154页
    CHAPTER 1 INTRODUCTION第23-30页
        1.1 Motivation第23-26页
        1.2 Statement of The Problem第26-27页
        1.3 Approach第27-28页
        1.4 Overview of Contributions第28-29页
        1.5 Conclusion第29-30页
    CHAPTER 2 CHARACTERISTICS OF HYDROACOUSTICS第30-59页
        2.1 Introduction第30-31页
        2.2 Review of CAA Methods第31-34页
        2.3 Driect Simulation第34-36页
            2.3.1 Large Scale Simulation第35-36页
            2.3.2 Wave Extrapolation Method第36页
        2.4 Scalar Equations第36-49页
            2.4.1 Lighthill's Equation第37-39页
            2.4.2 Lighthill's Equation Modified for Incompressible Flow第39-41页
            2.4.3 Ffowcs Williams and Hawkings' Equation第41-44页
            2.4.4 Curle's Equation第44-46页
            2.4.5 Discussion on Scalar Equations第46-49页
        2.5 Sound Generation第49-52页
            2.5.1 Lighthill equation In The Light of Hydroacoustics第49-52页
        2.6 Sound Pressure Level第52-53页
        2.7 Noise Analysis in Computational Fluid Dynamics (CFD)第53-56页
            2.7.1 Near Field Noise Prediction第54页
            2.7.2 Far Field Noise Prediction第54-56页
        2.8 Types of Noise Sources第56-59页
            2.8.1 Monopole Sources第56-57页
            2.8.2 Dipole and Rotating Dipole Sources第57-59页
    CHAPTER 3 MODELING ACOUSTICS SIMULATION:NUMERICAL METHOD OF SOLUTION第59-75页
        3.1 Numerical Method of Solution第60-64页
            3.1.1 Objective第62-63页
            3.1.2 Simulation Proceedings第63-64页
        3.2 Model Designing第64-68页
        3.3 Meshing Method第68-69页
        3.4 Fluid Region Definaion:Boundry Conditions第69-71页
        3.5 Procedure of Noise Source Strength Estimation第71-74页
            3.5.1 Procedure-Monopole Sources第72-73页
            3.5.2 Solver and Output Control Parameters第73-74页
        3.6 Conclusion第74-75页
    CHAPTER 4 LIGHTHILL STRESS TENSOR-METHODOLOGICAL ANALYSIS AND VERIFICATION第75-113页
        4.1 Introduction第75-76页
        4.2 Numerical Methodological Procedure第76-78页
        4.3 Two Equation Turbulence Model Introduction第78-83页
            4.3.1 The Advantages/Disadvantages of Each Turbulence Model第79-82页
            4.3.2 The Motivation of Choosing Turbulent Model第82-83页
        4.4 Computational Analysis-Validation of Test Cases第83-90页
            4.4.1 Coefficients Description第84-85页
            4.4.2 N.E Suhs Experiment Noise Results-Turbulent Model Comparison第85-90页
        4.5 Regression Analysis Results-Experimental Comparison第90-98页
            4.5.1 Discussion on Regression Results第94-98页
        4.6 New Proposed Turbulent Schmidt number-Sc_(t|ε,ω)第98-102页
        4.7 Bauer's Cavity(L/D=2)Experiment Noise Results Comparison第102-107页
            4.7.1 Flow Solution第103-106页
            4.7.2 Acoustic Results第106-107页
        4.8 Circular Cylinder Flow-Noise Results Comparison第107-110页
            4.8.1 Flow Solution第108页
            4.8.2 Acoustic Results第108-110页
        4.9 Flat plate Flow-Noise Results第110-111页
        4.10 Conclusion第111-113页
    CHAPTER 5 ACOUSTIC RESULTS-SUBMARINE HULL PROFILE第113-154页
        5.1 Introduction第113-114页
        5.2 Acoustic Strength Estimation-A Turbulence Model Comparison第114-118页
        5.3 Maneuvering Submarine Acoustic Strength Results第118-128页
            5.3.1 5° Bow and Port Tilt Acoustic Strength Results第119-121页
            5.3.2 10° Bow and Port Tilt Acoustic Strength Results第121-123页
            5.3.3 15° Bow and Port Tilt Acoustic Strength Results第123-126页
            5.3.4 Discussion on Bow Tilt Acoustic Strength Results Analysis第126-127页
            5.3.5 Discussion on Port Tilt Acoustic Strength ResultsAnalysis第127-128页
        5.4 Hydroplanes Inclusion on Submarine Mailsail-An Acoustical Analysis第128-138页
            5.4.1 Bridge Fin/Mainsail Vortices第130-132页
            5.4.2 Port Tilt Sound Level Gradient With and Without Mainsail Hydroplanes第132-135页
            5.4.3 Bow Tilt Sound Level Gradient With and Without Mainsail Hydroplanes第135-138页
        5.5 Submarine Nose Shape-An Acoustical Analysis第138-147页
            5.5.1 Acoustical Effects on the Separation of Flow Near Bow第139-140页
            5.5.2 Effect of Pressure Distribution on Submarine Nose Shape第140-142页
            5.5.3 Symmetrical:Asymmetrical Nose Shape Configuration第142-143页
            5.5.4 Nose Shape Pressure Distribution Results第143-145页
            5.5.5 Nose Shape acoustic Results第145-147页
        5.6 Acoustical Hotspots on Submarine-CGNS Integration CFD-BEM Approach第147-151页
            5.6.1 Acoustical Hotspots Detection Procedure第149-151页
        5.7 Conclucion-Discussion on Acoustic Strength Analysis Results第151-154页
SECTION'B'第154-230页
    CHAPTER 6 STRUCTURAL VIBRO-ACOUSTICS第154-174页
        6.1 Introduction第154-156页
        6.2 Acoustic Fluid Fundamentals第156-163页
            6.2.1 Discretisation of the Lossless Wave Equation第159-163页
        6.3 Absorption of Acoustical Pressure Wave第163-165页
            6.3.1 Addition of Dissipation Due To Damping at the Boundary第163-165页
        6.4 Acoustics Fluid-Structure Coupling第165-166页
        6.5 Acoustics Output Quantities第166-168页
        6.6 Boundary Element Model Theory第168-173页
            6.6.1 Radiation Efficiency第172页
            6.6.2 Input Power第172页
            6.6.3 Active Output Power第172-173页
            6.6.4 Mean Quadratic Velocity第173页
        6.7 Conelusion第173-174页
    CHAPTER 7 DOUBLE CYLINDER HULL MULTI-EXCITATION ANALYSIS THROUGH LINEAR SUPERPOSITION METHOD第174-207页
        7.1 Introduction第174-175页
        7.2 Multi-Excitation Numerical Approach第175-177页
        7.3 Model Designing(Model第177-182页
            7.3.1 Meshing第180-182页
        7.4 Procedural Verification of Method Used (Model第182-185页
            7.4.1 Analysis of the Experimental Results第184-185页
        7.5 Vibro-Acoustic Characteristic Results of Double Cylinder第185-196页
            7.5.1 Analysis of Vibration Characteristics Results第186-192页
            7.5.2 Analysis of Noise Characteristic Results第192-196页
        7.6 Directivity Analysis of Sound Pressure Level Results第196-203页
        7.7 Sound Pressure Level Results Expressed in Both 3-D Time and Frequency Domain第203-205页
        7.8 Conclusion第205-207页
    CHAPTER 8 SUBMARINE HYDRO-ACOUSTIC RADIATION ANALYSIS THROUGH CFD-FEM-BEM APPROACH第207-230页
        8.1 Introduction第207-208页
        8.2 Numerical Approach第208页
        8.3 Model Designing CFD-FEM-BEM第208-213页
            8.3.1 Meshing第211-213页
        8.4 Model Reduction by Comparative Constraints第213-215页
        8.5 Flow-Vibro-Acoustic Characteristic Results of Submarine with Pressure Hull第215-224页
            8.5.1 Analysis of Vibration Characteristics Results第216-220页
                8.5.1.1 Vibration Characteristics Results for Forward Hydroplanes Region第216-217页
                8.5.1.2 Vibration Characteristics Results for Mainsail Region第217-219页
                8.5.1.3 Vibration Characteristics Results for Tail Hydroplanes Region第219-220页
            8.5.2 Analysis of Noise Characteristics Results第220-224页
                8.5.2.1 Noise Characteristics Results for Forward Hydroplanes Region第221-222页
                8.5.2.2 Noise Characteristics Results for Mainsail Region第222-223页
                8.5.2.3 Noise Characteristics Results for Tail Hydroplanes Region第223-224页
        8.6 Directivity Analysis of Sound Pressure Level Results第224-228页
        8.7 Conclusion第228-230页
SECTION'C'第230-235页
    CHAPTER 9 CONCLUSION AND RECOMMENDATIONS第230-235页
        9.1 Conclusion第230-234页
        9.2 Recommendations for Future Work第234-235页
REFERENCES第235-247页
Research Papers第247-248页
Acknowledgement第248-249页
Appendix-A Nomenclature第249-251页
Appendix-B Lighthill Stress Tensor-Complete Results第251-268页
Appendix C Coefficient of Pressure on Submarine Surface Polyline第268-284页

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