本文選題：電動機減振 + 參數(shù)優(yōu)化　； 參考：《湖南科技大學》2014年碩士論文

【摘要】：彈性支撐對于工作在特殊環(huán)境下的旋轉機械具有重要的作用，較為突出的代表是風力發(fā)電機與海上鉆井平臺，由于其工作環(huán)境的限制，需要通過彈性支撐減小外界引起的振動，，避免事故的發(fā)生。基于此本文以電動機為研究對象，對彈性支撐減振參數(shù)進行優(yōu)化，提供了一種系統(tǒng)的分析方法。本文研究內(nèi)容有以下幾個方面： (1)基于減振墊的工作原理及其動力學特性，對減振墊設計的步驟做出了詳細的說明，通過理論上的計算方法，計算出不同的減振效率需要的減振墊的剛度大小，得到對應的剛度值，從而推導出減振墊彈性模量大小，并為后續(xù)仿真實驗奠定了基礎。 (2)對電動機三維模型進行了建模分析，建立了不同網(wǎng)格質量的有限元模型。對比不同網(wǎng)格質量對模態(tài)的影響，采用中等質量的網(wǎng)格劃分方法能夠得到和采用高等質量網(wǎng)格相同的效果，并且所采用的仿真時間減少，能夠降低時間成本，以此分別對電動機轉子、定子、電動機整體模態(tài)進行分析，得到電動機各部件及整體的振動情況。 (3)首先對電動機-減振墊系統(tǒng)進行動力學分析，得到減振墊不同剛度值對電動機-減振墊系統(tǒng)整體固有頻率的影響；然后對多體動力學軟件進行了簡單的介紹，列舉常見的多體動力學軟件及其特點，使用ADAMS可以自動對每一個減振參數(shù)進行設定，得到電動機-減振墊系統(tǒng)加速度有效值，能夠快速找到在電動機工作轉速條件下使用減振墊的最優(yōu)剛度范圍。 (4)通過得到的減振墊剛度優(yōu)化參數(shù)范圍選取減振墊進行實驗，驗證了在轉速頻率為30HZ的情況下，添加優(yōu)化得到的減振剛度對電動機整體的振動有所降低，并得到了電動機在不同的工作轉速下，需要添加不同的減振墊以達到減振效果的結論。
[Abstract]:Elastic bracing plays an important role in rotating machinery working in special environment. The outstanding representative is wind turbine and offshore drilling platform. Due to the limitation of its working environment, it is necessary to reduce the vibration caused by the outside through elastic support. Avoid an accident. Based on this, this paper takes the motor as the research object, optimizes the vibration absorption parameters of elastic braces, and provides a systematic analysis method. The contents of this paper are as follows: 1) based on the working principle and dynamic characteristics of the damping pad, the design steps of the damping pad are explained in detail. Through the theoretical calculation method, the stiffness of the damping pad required by different damping efficiency is calculated. The corresponding stiffness value is obtained, and the elastic modulus of the damping pad is deduced, which lays a foundation for the subsequent simulation experiment. 2) the 3D model of motor is modeled and analyzed, and the finite element model with different mesh quality is established. Compared with the effect of different mesh quality on the modal, the meshing method with medium quality can achieve the same effect as the high quality mesh, and the simulation time is reduced, and the time cost can be reduced. The rotor, stator and overall mode of the motor are analyzed, and the vibration of the components and the whole of the motor are obtained. Firstly, the dynamic analysis of the motor-damping cushion system is carried out, and the influence of the different stiffness values of the damping pad on the whole natural frequency of the motor-damping pad system is obtained, and then the multi-body dynamic software is introduced briefly. The common multi-body dynamics software and its characteristics are listed. Each damping parameter can be set automatically by using ADAMS, and the effective acceleration value of the motor damping pad system can be obtained. The optimal stiffness range of the damping pad can be found quickly under the working speed of the motor. 4) through the experiment of selecting the optimum parameter range of the stiffness of the damping pad, it is verified that when the rotational speed frequency is 30HZ, the damping stiffness obtained by adding the optimized damping stiffness can reduce the whole vibration of the motor. At the same time, it is concluded that different damping pads should be added to the motor at different working speeds to achieve the effect of vibration reduction.
【學位授予單位】：湖南科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TB535.1

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