【摘要】：波浪能以其其分布廣泛、儲存量大以及捕獲裝置多樣化等優(yōu)點,受到國內(nèi)外研究學(xué)者與相關(guān)政府的青睞,成為最具潛力的可再生新能源之一。本文結(jié)合了振蕩浮子式和振動能量捕獲裝置,引入非線性系統(tǒng),提出了一種基于非線性Duffing方程的波浪能發(fā)電裝置,,采用非線研究方法對系統(tǒng)動力學(xué)模型進行研究分析,探討在不同參數(shù)下的系統(tǒng)動力學(xué)特性。首先,提出了新型的機-電-磁耦合波浪能發(fā)電裝置的結(jié)構(gòu),對其工作原理進行了說明,并對系統(tǒng)作出了假設(shè),建立該系統(tǒng)的動力學(xué)方程,同時對波浪能進行了研究分析,推導(dǎo)出波浪能能量的表達式。其次,對機-電-磁耦合系統(tǒng)中的振蕩浮子系統(tǒng)進行了分析。分別對該非線性浮子系統(tǒng)進行定性分析與數(shù)值模擬,其中定性分析主要包括勢函數(shù)分析、恢復(fù)力分析、平衡點分析以及Hamilton函數(shù)分析等;運用Matlab進行數(shù)值模擬分析,研究了不同參數(shù)下,振蕩浮子的運動特征。再次,對機-電-磁耦合系統(tǒng)進行了分析。利用平均法對非線性動力學(xué)方程組進行了求解,并且繪制其幅頻曲線,通過該曲線分析系統(tǒng)參數(shù)與穩(wěn)態(tài)解、非穩(wěn)態(tài)解之間的關(guān)系以及參數(shù)與頻率帶寬之間的關(guān)系,得出當(dāng)參數(shù)在某一范圍時,系統(tǒng)處于大幅度的周期運動,并且頻帶變寬,從而實現(xiàn)高效平穩(wěn)的發(fā)電。此外,對耦合系統(tǒng)進行了數(shù)值模擬,研究了不同參數(shù)下的發(fā)電量變化規(guī)律。最后,利用液壓系統(tǒng)作為中間轉(zhuǎn)換裝置,提出了一種機-液-電耦合波浪能發(fā)電裝置,對該裝置的結(jié)構(gòu)及工作原理進行了闡述說明,同時對系統(tǒng)進行了動力學(xué)建模,得到了七自由度微分方程組,并且進行了參數(shù)選取。運用Simulink模塊搭建,進行了仿真分析,研究了不同非線性參數(shù)下的系統(tǒng)動力學(xué)特征以及輸出角速度的變化規(guī)律。
[Abstract]:Wave energy is one of the most potential renewable energy sources due to its advantages such as wide distribution, large storage and diversified capture devices, and so on, which is favored by domestic and foreign researchers and relevant governments. In this paper, a wave energy generator based on nonlinear Duffing equation is proposed, which combines the oscillating float type and the vibration energy capture device. The dynamic model of the system is studied and analyzed by using the non-linear research method. The dynamic characteristics of the system under different parameters are discussed. Firstly, the structure of a new type of mechanical-electric-magnetic coupling wave energy generator is proposed, its working principle is explained, the system is hypothesized, the dynamic equation of the system is established, and the wave energy is studied and analyzed. The expression of wave energy is derived. Secondly, the oscillating float system in the mechanical-electric-magnetic coupling system is analyzed. The qualitative analysis and numerical simulation of the nonlinear float system are carried out respectively. The qualitative analysis mainly includes potential function analysis, restoring force analysis, equilibrium point analysis and Hamilton function analysis. The motion characteristics of oscillating float under different parameters are studied by using Matlab numerical simulation. Thirdly, the mechanical-electro-magnetic coupling system is analyzed. The nonlinear dynamic equations are solved by the averaging method, and the amplitude-frequency curves are plotted. The relationship between the system parameters and the steady-state solutions, the unsteady solutions and the relationship between the parameters and the frequency bandwidth is analyzed. It is concluded that when the parameters are in a certain range, the system is in a large amplitude of periodic motion, and the frequency band is widened, so as to achieve efficient and stable power generation. In addition, the coupling system is numerically simulated, and the variation law of electricity generation under different parameters is studied. Finally, using hydraulic system as intermediate conversion device, a kind of mechanical-liquid-electric coupling wave energy generating device is proposed. The structure and working principle of the device are explained, and the dynamic modeling of the system is also carried out. The differential equations of seven degrees of freedom are obtained and the parameters are selected. The dynamic characteristics of the system and the variation law of the output angular velocity under different nonlinear parameters are studied by using the Simulink module and the simulation analysis.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM612

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