大功率风电增速箱振动响应及结构噪声分析

发布时间：2019-03-01 19:05

【摘要】：随着我国经济的发展，对能源的需求量越来越大以及在紧张的供应形势下，风能作为一种重要的新型能源，越来越受重视并且不断地扩大其应用范围，从而不断地触发了风力发电技术快速地往前发展。风电增速箱传动系统作为整个风力发电装备的核心组成部件之一，主要功能是在风载作用下风叶产生的动力通过其增速传递给发电机，因此对风电增速箱系统的可靠性和稳定性提出了很高的要求。风电齿轮箱正朝着大功率方向发展，在高速、重载以及恶劣的环境下运行，对齿轮箱在正常运转的状态下产生的振动和噪声具有很大的影响，因此研究风电齿轮箱的振动特性及噪声问题显得尤为重要。本课题来源于国家科技支撑计划项目，以大功率分流式风电增速齿轮箱为研究对象，采用有限元分析方法，研究在内部动态激励下齿轮箱的动态特性及结构噪声问题。本文研究的相关内容如下： ①建立了两级行星轮加一级平行轴风电增速齿轮箱三维实体模型和耦合有限元模型，计算整个系统的传动比和实际载荷作用下的轴承支撑刚度。 ②采用matlab软件编程和有限元模拟仿真的方法，计算了包含时变刚度激励、误差激励和啮入冲击激励在工况下的直齿轮和斜齿轮啮合齿轮副的内部动态激励。 ③在ABAQUS有限元分析模块中，，采用Lanczos方法对风电增速箱系统和箱体进行固有特性分析，提取其前20阶固有频率和固有振型。 ④考虑内部动态激励作用下，采用振型叠加法对风电齿轮箱的动态响应进行有限元数值求解，得到相应的位移、速度和加速度振动时域特性曲线，然后经过快速傅里叶变换（FFT）得到各自的频响曲线，并进行齿轮箱振动烈度评价。 ⑤在加速度频响曲线的基础上，根据加速度级1/3倍频程原理计算分析齿轮箱的结构噪声值。
[Abstract]:With the development of China's economy, the demand for energy is increasing, and under the tight supply situation, wind energy, as an important new type of energy, has been paid more and more attention and its application scope has been continuously expanded. As a result, the rapid development of wind power generation technology has been triggered. As one of the core components of the whole wind power generation equipment, the main function of the wind power growth box transmission system is to transfer the power generated by the wind blade to the generator through its growth rate under the action of the wind load. Therefore, the reliability and stability of wind power booster system is required. The wind-electric gear box is developing towards high power, running in high-speed, heavy-duty and bad environment, which has a great influence on the vibration and noise of the gearbox under the normal operation condition. Therefore, it is very important to study the vibration characteristics and noise of wind-electric gear box. This subject comes from the national science and technology support project. The dynamic characteristics and structural noise of the gearbox under the internal dynamic excitation are studied by using the finite element analysis method, taking the gearbox of high-power and split-flow wind power as the research object. The main contents of this paper are as follows: (1) the three-dimensional solid model and coupling finite element model of two-stage planetary wheel plus one-stage parallel axis wind power growth gearbox are established. The transmission ratio of the whole system and the bearing support stiffness under actual load are calculated. (2) the internal dynamic excitation of spur gear and helical gear meshing pair including time-varying stiffness excitation, error excitation and meshing impact excitation is calculated by means of matlab software programming and finite element simulation. 3 in the ABAQUS finite element analysis module, the Lanczos method is used to analyze the inherent characteristics of the wind power increasing box system and the box body, and the first 20 order natural frequencies and natural vibration modes are extracted. (4) considering the internal dynamic excitation, the dynamic response of wind power gearbox is numerically solved by means of mode superposition method, and the corresponding time domain characteristic curves of displacement, velocity and acceleration are obtained. Then the frequency response curves are obtained by fast Fourier transform (FFT), and the vibration intensity of gearbox is evaluated. 5 on the basis of acceleration frequency response curve, the structural noise value of gear box is calculated and analyzed according to the principle of acceleration level 1 / 3 octave.
【学位授予单位】：重庆理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614

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