【摘要】：隨著經(jīng)濟(jì)社會的快速發(fā)展,能源危機(jī)變得日益嚴(yán)重。飛輪儲能作為一種新型的儲能技術(shù),具有存儲能量高、儲能密度大、高效可靠無污染等優(yōu)勢。隨著高強(qiáng)度復(fù)合材料的出現(xiàn)、電機(jī)和控制系統(tǒng)的不斷發(fā)展以及磁懸浮軸承技術(shù)的日益完善,使得飛輪儲能系統(tǒng)在應(yīng)力水平、儲能密度和動態(tài)性能方面得到了進(jìn)一步提升,為飛輪儲能技術(shù)帶來廣闊的研究空間和應(yīng)用前景。通過閱讀大量文獻(xiàn),了解飛輪儲能系統(tǒng)的國內(nèi)外研究現(xiàn)狀,完成系統(tǒng)整體結(jié)構(gòu)設(shè)計、飛輪應(yīng)力水平分析和系統(tǒng)動態(tài)性能研究,對飛輪儲能系統(tǒng)的優(yōu)化有重要的指導(dǎo)意義。首先根據(jù)給定的技術(shù)指標(biāo),為飛輪系統(tǒng)確定合理的機(jī)械電氣結(jié)構(gòu),完成一系列重要部件的選型,保證整個系統(tǒng)結(jié)構(gòu)緊湊,控制良好,,運(yùn)行可靠。以周向纏繞復(fù)合材料飛輪為研究對象,建立整個飛輪轉(zhuǎn)子的幾何模型,結(jié)合復(fù)合材料力學(xué)知識完成飛輪運(yùn)動平衡方程的建立,并最終得到飛輪轉(zhuǎn)子徑向應(yīng)力和環(huán)向應(yīng)力的理論表達(dá)式,為飛輪的應(yīng)力分析奠定理論基礎(chǔ)。利用ANSYS Workbench有限元軟件對單層和多層飛輪轉(zhuǎn)子的應(yīng)力進(jìn)行詳細(xì)的分析。對于單層飛輪轉(zhuǎn)子,分析彈性模量比、內(nèi)外半徑比和泊松比對飛輪徑向應(yīng)力和環(huán)向應(yīng)力的影響；對于多層飛輪轉(zhuǎn)子,分析多層同構(gòu)和多層異構(gòu)情況下飛輪轉(zhuǎn)子應(yīng)力的變化。同時還考慮徑向厚度和層間過盈量對應(yīng)力的影響。最后通過對轉(zhuǎn)子動力學(xué)和模態(tài)分析理論的了解,利用ANSYS Workbench軟件對飛輪轉(zhuǎn)子系統(tǒng)進(jìn)行模態(tài)分析,得到系統(tǒng)的固有頻率和振型。同時對影響系統(tǒng)臨界轉(zhuǎn)速的因素作了詳細(xì)分析,包括飛輪軸的結(jié)構(gòu)尺寸、陀螺效應(yīng)、電磁軸承的剛度和阻尼,通過對比分析數(shù)據(jù),找到各因素對臨界轉(zhuǎn)速的影響規(guī)律,從而優(yōu)化參數(shù),改善系統(tǒng)的振動特性。
[Abstract]:With the rapid development of economy and society, the energy crisis becomes more and more serious. As a new energy storage technology, flywheel energy storage has the advantages of high energy storage, high energy density, high efficiency, reliability and no pollution. With the appearance of high strength composite materials, the continuous development of motor and control system and the improvement of magnetic bearing technology, the flywheel energy storage system has been further improved in stress level, energy storage density and dynamic performance. It brings broad research space and application prospect for flywheel energy storage technology. By reading a large number of literatures, the research status of flywheel energy storage system at home and abroad is understood, and the overall structure design, the analysis of flywheel stress level and the study of system dynamic performance are completed, which is of great significance to the optimization of flywheel energy storage system. Firstly, according to the given technical index, the reasonable mechanical and electrical structure is determined for the flywheel system, and a series of important parts are selected to ensure the compact structure, good control, reliable operation of the whole system. Taking the circumferential winding composite flywheel as the research object, the geometric model of the whole flywheel rotor is established, and the motion balance equation of the flywheel is established by combining the composite mechanics knowledge. Finally, the theoretical expressions of radial stress and circumferential stress of flywheel rotor are obtained, which lays a theoretical foundation for the stress analysis of flywheel. The stress of single-layer and multi-layer flywheel rotor is analyzed in detail by ANSYS Workbench finite element software. For single-layer flywheel rotor, the effects of elastic modulus ratio, internal and external radius ratio and Poisson ratio on radial stress and circumferential stress of flywheel are analyzed, and for multi-layer flywheel rotor, the variation of rotor stress under multi-layer isomorphism and multi-layer isomerism is analyzed. The influence of radial thickness and interlaminar interference on stress is also considered. Finally, through the understanding of rotor dynamics and modal analysis theory, the natural frequency and mode shape of flywheel rotor system are obtained by using ANSYS Workbench software. At the same time, the factors influencing the critical speed of the system are analyzed in detail, including the structure size of the flywheel shaft, the gyro effect, the stiffness and damping of the electromagnetic bearing. In order to optimize the parameters and improve the vibration characteristics of the system.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB33;TM91

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