本文選題：風(fēng)力發(fā)電機(jī)　切入點(diǎn)：自振特性　出處：《南京航空航天大學(xué)》2013年碩士論文

【摘要】：風(fēng)力發(fā)電機(jī)是典型的高聳塔體結(jié)構(gòu)。在設(shè)計(jì)中應(yīng)根據(jù)自振特性分析選取合理的結(jié)構(gòu)形式、結(jié)構(gòu)材料等以盡量降低結(jié)構(gòu)在工作環(huán)境下的共振效應(yīng)，保證高塔系統(tǒng)整體穩(wěn)定性。在風(fēng)機(jī)工作環(huán)境中風(fēng)荷載為控制荷載，，因此研究風(fēng)力發(fā)電機(jī)塔架在風(fēng)荷載作用下的風(fēng)振響應(yīng)和提取風(fēng)振系數(shù)對(duì)實(shí)際工程具有重要意義。另外，考慮土-結(jié)相互作用對(duì)于結(jié)構(gòu)在地震作用下的動(dòng)力響應(yīng)有著一定影響，因此在風(fēng)力發(fā)電機(jī)結(jié)構(gòu)設(shè)計(jì)中應(yīng)充分考慮地基與結(jié)構(gòu)之間的相互作用。本文對(duì)風(fēng)力發(fā)電機(jī)高塔系統(tǒng)進(jìn)行了葉片-機(jī)艙-塔架-基礎(chǔ)-地基一體化建模，并進(jìn)行了以下工作： (1)對(duì)某1.2WM典型風(fēng)力發(fā)電機(jī)進(jìn)行了模態(tài)分析，研究了其各階自振頻率和振型。并通過(guò)改變各尺寸變量，討論了其對(duì)風(fēng)力發(fā)電機(jī)自振頻率影響。最后根據(jù)數(shù)值實(shí)驗(yàn)結(jié)果擬合出風(fēng)力發(fā)電機(jī)幾種尺寸變量對(duì)風(fēng)機(jī)基頻及傾覆頻率的影響函數(shù)。 (2)通過(guò)輸入不同風(fēng)速譜，基于隨機(jī)振動(dòng)理論分析了風(fēng)力發(fā)電機(jī)的風(fēng)致振動(dòng)響應(yīng)及風(fēng)振系數(shù)。并討論了風(fēng)速譜對(duì)風(fēng)致響應(yīng)的影響，以及風(fēng)速譜和峰值因子對(duì)風(fēng)振系數(shù)的影響。 (3)由土彈簧模擬地基土的影響，對(duì)風(fēng)力發(fā)電機(jī)塔架-基礎(chǔ)-地基系統(tǒng)進(jìn)行地震反應(yīng)分析，并與剛性地基情形的動(dòng)力響應(yīng)結(jié)果進(jìn)行了對(duì)比，分析了土結(jié)相互作用對(duì)風(fēng)力機(jī)塔架的地震響應(yīng)影響。 (4)對(duì)本文工作進(jìn)行總結(jié)，并給出風(fēng)力發(fā)電機(jī)系統(tǒng)進(jìn)一步動(dòng)力分析的研究建議。
[Abstract]:Wind turbine is a typical towering tower structure. In order to reduce the resonance effect of the structure in working environment, the reasonable structure form and structural material should be selected according to the natural vibration characteristics in the design. In order to ensure the overall stability of tower system, the wind vibration response of wind turbine tower under wind load and the extraction of wind vibration coefficient are of great significance to practical engineering, since the wind stroke load is the control load in the wind turbine working environment, so the wind vibration response of wind turbine tower under wind load is studied and the wind-induced vibration coefficient is extracted. Considering the influence of soil-junction interaction on the dynamic response of structures under earthquake, Therefore, the interaction between foundation and structure should be fully taken into account in the structural design of wind turbine. In this paper, the integrated modeling of blade, engine room, tower, foundation and foundation of wind turbine tower system is carried out, and the following work is done:. In this paper, the modal analysis of a typical 1.2WM wind turbine is carried out, and the natural frequencies and modes of each order are studied. Finally, according to the results of numerical experiments, the influence functions of several dimensional variables of wind turbine on the basic frequency and overturn frequency of wind turbine are fitted. Based on the random vibration theory, the wind-induced vibration response and wind-induced vibration coefficient of wind turbine are analyzed, and the influence of wind speed spectrum on wind-induced response and the influence of wind velocity spectrum and peak factor on wind-induced vibration coefficient are discussed. 3) the seismic response analysis of wind turbine tower foundation foundation system is carried out by simulating the influence of soil spring on foundation soil, and the results are compared with the dynamic response results of rigid foundation. The influence of soil-junction interaction on the seismic response of wind turbine tower is analyzed. 4) summarize the work of this paper and give some suggestions for further dynamic analysis of wind turbine system.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU347;TU311.3

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