仿脊柱弦向变弯度机翼结构设计及气动性能分析

发布时间：2021-04-07 14:48

　　传统固定翼飞行器为满足不同条件飞行的需求采用了包容性的设计方案,使得飞行器在不同飞行环境下的性能均不能处于最优状态。为满足多任务飞行的需求,近年来国内外基于仿生学角度提出多种随外界环境变化而相应改变自身气动布局的变体飞行器,并对其进行静力学、动力学以及气动性能等方面分析研究。基于仿生学原理分析多种可变构型,提出一种新型仿脊柱弦向可变形机翼结构（简称ACM翼）,并配备不可逆驱动系统;该机翼结构可以随外界环境的变化产生相应的变形,可以应用于后缘襟翼的设计。弦向可变形机翼结构主要包括刚性翼梁、梁式脊柱、支撑桁条、预拉伸蒙皮以及驱动系统五个部分,其中对比多种驱动方式气动系统采用电机驱动碳纤维腱滑轮传动的方式实现致动。为消除驱动过程中蒙皮屈曲褶皱问题,结合有限元仿真分析软件ANSYS,进行了预拉伸蒙皮力学特性分析;在预拉伸蒙皮的基础上,结合有限元仿真分析软件ANSYS,分析机翼挠度与驱动力的关系,评估变形驱动所需力矩。结合流体分析软件Fluent,对比基础NACA 0012机翼、带襟翼NACA 0012机翼以及仿脊柱可变形机翼结构的升阻特性,分析三种机翼气动效率。模拟不同飞行速度、不同攻角、不同... 

【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校

【文章页数】：96 页

【学位级别】：硕士

【文章目录】：
摘要
Abstract
Nomenclature
Chapter 1. Introduction
    1.1 Background and motivation
    1.2 Research significance
    1.3 Literature review
        1.3.1 History
        1.3.2 Current scenario
        1.3.3 Morphing types
        1.3.4 Advantages of morphing wing
    1.4 Main research content
    1.5 Overview
Chapter 2. Active Camber morphing Concept
    2.1 Morphing design and analyzation criteria
        2.1.1 Analysis criterion of morphing
        2.1.2 Key component of the structure
    2.2 Aerostructure shape optimization
        2.2.1 Morphing leading edge
        2.2.2 Morphing trailing edge
    2.3 Probable design configuration
        2.3.1 Initial design configuration of active camber morphing
        2.3.2 Probable actuation device
        2.3.3 Elastomeric matrix composite polymer skin
        2.3.4 Material screening establishment
    2.4 Summary
Chapter 3. Modeling of ACM spine
    3.1 Theoretical approach of the mechanism
        3.1.1 Wing size estimation
        3.1.2 Actuation mechanism determination
    3.2 Detail design of ACM spine
        3.2.1 Spar
        3.2.2 Beam Spline
        3.2.3 Stringers
        3.2.4 Trailing edge strip
        3.2.5 Actuation system
        3.2.6 Skin
    3.3 Pre-tensioning mechanism
        3.3.1 Per-tensioning procedure
        3.3.2 Pre-tensioning analysis
    3.4 Mechanism analysis
        3.4.1 Data mapping of the initial stresses
        3.4.2 Analysis of the actuation system
    3.5 Summary
Chapter 4. Analysis and evaluation of ACM spine
    4.1 Aerodynamic structure modeling
        4.1.1 General aerodynamic modeling
        4.1.2 Estimation of turbulence model
    4.2 Fluent aerodynamic performance analysis procedure
        4.2.1 Importing and meshing the mechanism
        4.2.2 Key parameter selection
    4.3 Aerodynamic simulation results
        4.3.1 Analyzation of NACA 0012 airfoil
        4.3.2 Pressure and velocity contour
        4.3.3 Effect of velocity
        4.3.4 Effect of angle of attack （α）
    4.4 Summary
Conclusion
结论
Recommendation
Reference
Acknowledgement
APPENDIXES
    Appendix A – Velocity analysis result data
    Appendix B – AOA analysis result data
    Appendix C – MATLAB Codes
        Ⅰ. Lift polar
        Ⅱ. Drag polar
        Ⅲ. Lift efficiency



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