后缘小翼旋翼桨叶动载荷分析与驱动机构设计优化
发布时间：2018-08-04 18:16
【摘要】：直升机由于具有垂直起降、低速飞行、起飞场地不受限制等优点而被广泛应用于救援、运输等民用领域以及反潜、侦察等军事领域。但其在飞行过程中由于旋转的细长弹性桨叶工作在复杂的气动力和离心力环境中,所以面临严重的振动噪声问题。应用于直升机旋翼的减振方法主要有被动与主动两种。后缘小翼智能旋翼作为旋翼振动主动控制的一种方式,具有减振效果明显、适用频率范围宽等优点,本文选择后缘小翼式智能旋翼进行了分析研究。后缘小翼有多种驱动方式,其中菱形框驱动具有结构简单紧凑、驱动效率较高等优势,因此本文针对基于压电堆的菱形框驱动机构开展了分析与设计工作。在课题组已有的研究成果基础上,引入优化改进的小翼二维气动力模型,建立了后缘小翼智能旋翼气弹耦合动力学分析模型,采用粒子群算法与粒子群-遗传混合算法对后缘小翼控制率进行了优化,并对小翼的分布位置、几何尺寸等参数进行了分析与优化。在此基础上,开展了菱形框驱动装置的设计与优化工作。本文通过采用APDL参数化设计方法,对金属及碳纤维复合材料菱形框的长度、斜壁角度和斜壁厚度等参数进行了优化分析,得到了驱动性能最优的菱形框的尺寸参数。
[Abstract]:Helicopters are widely used in rescue, transportation and other civilian fields, as well as in anti-submarine, reconnaissance and other military fields because of their advantages such as vertical take-off and landing, low speed flight and unrestricted take-off site. However, during flight, the rotating slender elastic blades work in complex aerodynamic and centrifugal environments, so they face serious vibration and noise problems. There are two main methods for reducing vibration of helicopter rotor: passive and active. As an active control method of rotor vibration, the intelligent rotor with trailing edge wing has many advantages, such as obvious damping effect and wide applicable frequency range. In this paper, the intelligent rotor with rear edge wing is selected for analysis and study. There are many driving modes in the trailing edge wing, among which the diamond frame drive has the advantages of simple and compact structure and high driving efficiency. Therefore, the analysis and design work of the diamond frame drive mechanism based on piezoelectric pile is carried out in this paper. On the basis of the existing research results of the research group, an optimized two-dimensional aerodynamic model of the small wing is introduced, and the aero-elastic coupling dynamic analysis model of the intelligent rotor with the trailing edge is established. Particle swarm optimization (PSO) and particle swarm genetic algorithm (PSO) are used to optimize the control rate of the trailing wing, and the distribution position and geometric size of the wing are analyzed and optimized. On this basis, the design and optimization of the diamond frame drive device are carried out. In this paper, the APDL parametric design method is used to optimize the parameters such as the length, angle and thickness of the rhombic frame of metal and carbon fiber composites, and the dimension parameters of the rhombic frame with optimal driving performance are obtained.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V275.1
本文编号：2164703
[Abstract]:Helicopters are widely used in rescue, transportation and other civilian fields, as well as in anti-submarine, reconnaissance and other military fields because of their advantages such as vertical take-off and landing, low speed flight and unrestricted take-off site. However, during flight, the rotating slender elastic blades work in complex aerodynamic and centrifugal environments, so they face serious vibration and noise problems. There are two main methods for reducing vibration of helicopter rotor: passive and active. As an active control method of rotor vibration, the intelligent rotor with trailing edge wing has many advantages, such as obvious damping effect and wide applicable frequency range. In this paper, the intelligent rotor with rear edge wing is selected for analysis and study. There are many driving modes in the trailing edge wing, among which the diamond frame drive has the advantages of simple and compact structure and high driving efficiency. Therefore, the analysis and design work of the diamond frame drive mechanism based on piezoelectric pile is carried out in this paper. On the basis of the existing research results of the research group, an optimized two-dimensional aerodynamic model of the small wing is introduced, and the aero-elastic coupling dynamic analysis model of the intelligent rotor with the trailing edge is established. Particle swarm optimization (PSO) and particle swarm genetic algorithm (PSO) are used to optimize the control rate of the trailing wing, and the distribution position and geometric size of the wing are analyzed and optimized. On this basis, the design and optimization of the diamond frame drive device are carried out. In this paper, the APDL parametric design method is used to optimize the parameters such as the length, angle and thickness of the rhombic frame of metal and carbon fiber composites, and the dimension parameters of the rhombic frame with optimal driving performance are obtained.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V275.1
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相关期刊论文 前3条
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