水電站主廠房樓板與墻柱連接形式及設(shè)備隔振措施研究
發(fā)布時(shí)間：2019-05-06 21:19
【摘要】：隨著我國經(jīng)濟(jì)社會(huì)持續(xù)發(fā)展,能源需求不斷增長(zhǎng),國際能源形式和氣候變化問題愈加復(fù)雜,我國能源發(fā)展面臨的各種約束和矛盾將越來越突出。我國水能資源居世界首位,水電作為一種清潔能源,技術(shù)成熟,出力特性好,不僅可以滿足低碳經(jīng)濟(jì)的要求,同時(shí)又兼具防洪、灌溉、供水、航運(yùn)、旅游等綜合效益,具有廣闊的開發(fā)前景。同時(shí)作為當(dāng)今世界最具經(jīng)濟(jì)性的大規(guī)模儲(chǔ)能方式,抽水蓄能電站在系統(tǒng)調(diào)峰、保證供電質(zhì)量和促進(jìn)新能源消納等方面發(fā)揮著重要的作用。水電站廠房是機(jī)組動(dòng)荷載和水力脈動(dòng)荷載的作用主體,國內(nèi)外廠房的振動(dòng)問題非常普遍,廠房的振動(dòng)研究工作尤為重要。本文針對(duì)廠房設(shè)備振動(dòng)問題,運(yùn)用有限元方法,對(duì)主廠房樓板與上下游墻柱連接形式及設(shè)備隔振進(jìn)行分析研究,為水電站廠房結(jié)構(gòu)設(shè)計(jì)及設(shè)備的振動(dòng)控制提供參考。論文主要做了如下研究：(1)樓板是儀器設(shè)備的基礎(chǔ),樓板振動(dòng)特性對(duì)儀器設(shè)備的振動(dòng)有重要影響,針對(duì)樓板自振特性兩種計(jì)算方法,對(duì)整體結(jié)構(gòu)全質(zhì)量法與僅局部結(jié)構(gòu)有質(zhì)量法計(jì)算所得發(fā)電機(jī)層樓板自振頻率及振型進(jìn)行對(duì)比,計(jì)算結(jié)果表明：局部結(jié)構(gòu)有質(zhì)量法能較好的反應(yīng)發(fā)電機(jī)層樓板的振型和振動(dòng)規(guī)律,相同振型自振頻率雖略偏小,但整體上與全質(zhì)量法相差不大；局部結(jié)構(gòu)有質(zhì)量法計(jì)算階次少,處理簡(jiǎn)單。(2)樓板與周邊及其他結(jié)構(gòu)的連接條件對(duì)樓板振動(dòng)特性有重要影響,因此針對(duì)目前主廠房樓板與上下游墻柱兩種連接形式(固結(jié)、搭接),對(duì)兩種方案廠房結(jié)構(gòu)自振特性及機(jī)組荷載、脈動(dòng)壓力和水平雙向地震作用下廠房上部結(jié)構(gòu)不同部位的位移和應(yīng)力響應(yīng)進(jìn)行分析對(duì)比。結(jié)果表明,連接形式對(duì)上下游墻柱和樓板局部振動(dòng)自振特性影響較大,對(duì)廠房整體振動(dòng)自振特性影響較��；正常運(yùn)行工況機(jī)組荷載及水平雙向地震作用下,固結(jié)方案能夠顯著減小上下游墻柱的橫向振動(dòng)；轉(zhuǎn)輪葉片數(shù)頻率及導(dǎo)葉數(shù)頻率脈動(dòng)壓力作用下,兩種方案對(duì)廠房不同部位的動(dòng)力響應(yīng)的影響各有優(yōu)劣。(3)對(duì)廠房?jī)x器設(shè)備基礎(chǔ)采用彈簧阻尼隔振措施,研究隔振體系自振頻率、阻尼比、水平與豎向自振頻率比、布置方式及浮置基礎(chǔ)質(zhì)量對(duì)隔振效果的影響。研究表明,隔振體系自振頻率對(duì)隔振效果影響較大,需結(jié)合動(dòng)荷載特性、基礎(chǔ)自振特性及動(dòng)荷載作用下設(shè)備基礎(chǔ)振動(dòng)響應(yīng)綜合考慮確定；阻尼有利于降低隔振體系對(duì)低頻振源的振動(dòng)響應(yīng),對(duì)共振區(qū)振動(dòng)響應(yīng)有明顯的減振作用；大質(zhì)量浮置基礎(chǔ)有利于降低隔振體系對(duì)中高頻振源的振動(dòng)響應(yīng)；水平向自振頻率變化及隔振器布置方式對(duì)隔振體系豎向隔振效果影響可以忽略。
[Abstract]:With the sustained development of China's economy and society and the increasing demand for energy, the problems of international energy forms and climate change are becoming more and more complex, and the constraints and contradictions faced by China's energy development will become more and more prominent. Water resources in China rank first in the world. Hydropower, as a clean energy, has mature technology and good output characteristics. It can not only meet the requirements of low-carbon economy, but also have comprehensive benefits such as flood control, irrigation, water supply, shipping, tourism, and so on. It has a broad prospect of development. At the same time, as the most economical and large-scale energy storage mode in the world, pumped storage power station plays an important role in the aspects of system peak shaving, ensuring the quality of power supply and promoting the consumption of new energy sources. The powerhouse of hydropower station is the main body of the dynamic load and the hydraulic fluctuating load of the unit. The vibration problem of the powerhouse at home and abroad is very common and the vibration research of the powerhouse is especially important. Aiming at the vibration problem of powerhouse equipment, this paper analyzes and studies the connecting form of main powerhouse floor and upstream and downstream wall columns and the vibration isolation of equipment by using finite element method, which provides reference for the structural design and vibration control of hydropower station powerhouse. The main contents of this paper are as follows: (1) the floor is the foundation of the instrument and the vibration characteristics of the floor have an important influence on the vibration of the instrument. Two methods for calculating the free vibration characteristics of the floor are presented in this paper. The natural vibration frequency and mode shape of the floor slab of the generator floor are calculated by the total mass method of the whole structure and the mass method of the local structure. The results show that the mass method of the local structure can better the vibration pattern and vibration law of the floor slab of the generator floor. Although the natural frequency of the same vibration mode is slightly smaller, the difference between the natural frequency of the same vibration mode and the total mass method is not large. The local structure has less calculation order by mass method and is simple to deal with. (2) the connecting condition between floor and surrounding structure and other structures has an important influence on the vibration characteristics of the floor. Therefore, in view of the two kinds of connection forms (consolidation, consolidation) of the floor slab of the main factory building and the wall column of the upper and lower reaches at present, The displacement and stress responses of different parts of the powerhouse superstructure under the action of load, fluctuating pressure and horizontal bi-directional earthquake are analyzed and compared. The results show that the connection type has a great influence on the local vibration characteristics of wall columns and floors, but has little effect on the whole vibration characteristics of the factory building. Under the condition of normal operation load and horizontal bi-directional earthquake, the consolidation scheme can significantly reduce the lateral vibration of upstream and downstream wall columns. Under the action of fluctuating pressure on the number of blades and the number of guide blades, the two schemes have their own advantages and disadvantages on the dynamic response of different parts of the factory building. (3) the vibration isolation measures of spring damping are adopted for the equipment foundation of the factory building. The effects of natural vibration frequency, damping ratio, horizontal to vertical natural frequency ratio, arrangement mode and mass of floating foundation on vibration isolation effect of vibration isolation system are studied. The research shows that the natural frequency of vibration isolation system has a great influence on the vibration isolation effect. It is necessary to consider the characteristics of dynamic load, the natural vibration characteristics of the foundation and the vibration response of the equipment foundation under the action of the dynamic load. Damping is beneficial to reduce the vibration response of the vibration isolation system to the low frequency vibration source and to the vibration response of the resonance region, and the large mass floating foundation is helpful to reduce the vibration response of the vibration isolation system to the medium and high frequency vibration sources. The effect of horizontal natural vibration frequency change and vibration isolator arrangement on the vertical vibration isolation effect of vibration isolation system can be ignored.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TV223;TV312
本文編號(hào)：2470504
[Abstract]:With the sustained development of China's economy and society and the increasing demand for energy, the problems of international energy forms and climate change are becoming more and more complex, and the constraints and contradictions faced by China's energy development will become more and more prominent. Water resources in China rank first in the world. Hydropower, as a clean energy, has mature technology and good output characteristics. It can not only meet the requirements of low-carbon economy, but also have comprehensive benefits such as flood control, irrigation, water supply, shipping, tourism, and so on. It has a broad prospect of development. At the same time, as the most economical and large-scale energy storage mode in the world, pumped storage power station plays an important role in the aspects of system peak shaving, ensuring the quality of power supply and promoting the consumption of new energy sources. The powerhouse of hydropower station is the main body of the dynamic load and the hydraulic fluctuating load of the unit. The vibration problem of the powerhouse at home and abroad is very common and the vibration research of the powerhouse is especially important. Aiming at the vibration problem of powerhouse equipment, this paper analyzes and studies the connecting form of main powerhouse floor and upstream and downstream wall columns and the vibration isolation of equipment by using finite element method, which provides reference for the structural design and vibration control of hydropower station powerhouse. The main contents of this paper are as follows: (1) the floor is the foundation of the instrument and the vibration characteristics of the floor have an important influence on the vibration of the instrument. Two methods for calculating the free vibration characteristics of the floor are presented in this paper. The natural vibration frequency and mode shape of the floor slab of the generator floor are calculated by the total mass method of the whole structure and the mass method of the local structure. The results show that the mass method of the local structure can better the vibration pattern and vibration law of the floor slab of the generator floor. Although the natural frequency of the same vibration mode is slightly smaller, the difference between the natural frequency of the same vibration mode and the total mass method is not large. The local structure has less calculation order by mass method and is simple to deal with. (2) the connecting condition between floor and surrounding structure and other structures has an important influence on the vibration characteristics of the floor. Therefore, in view of the two kinds of connection forms (consolidation, consolidation) of the floor slab of the main factory building and the wall column of the upper and lower reaches at present, The displacement and stress responses of different parts of the powerhouse superstructure under the action of load, fluctuating pressure and horizontal bi-directional earthquake are analyzed and compared. The results show that the connection type has a great influence on the local vibration characteristics of wall columns and floors, but has little effect on the whole vibration characteristics of the factory building. Under the condition of normal operation load and horizontal bi-directional earthquake, the consolidation scheme can significantly reduce the lateral vibration of upstream and downstream wall columns. Under the action of fluctuating pressure on the number of blades and the number of guide blades, the two schemes have their own advantages and disadvantages on the dynamic response of different parts of the factory building. (3) the vibration isolation measures of spring damping are adopted for the equipment foundation of the factory building. The effects of natural vibration frequency, damping ratio, horizontal to vertical natural frequency ratio, arrangement mode and mass of floating foundation on vibration isolation effect of vibration isolation system are studied. The research shows that the natural frequency of vibration isolation system has a great influence on the vibration isolation effect. It is necessary to consider the characteristics of dynamic load, the natural vibration characteristics of the foundation and the vibration response of the equipment foundation under the action of the dynamic load. Damping is beneficial to reduce the vibration response of the vibration isolation system to the low frequency vibration source and to the vibration response of the resonance region, and the large mass floating foundation is helpful to reduce the vibration response of the vibration isolation system to the medium and high frequency vibration sources. The effect of horizontal natural vibration frequency change and vibration isolator arrangement on the vertical vibration isolation effect of vibration isolation system can be ignored.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TV223;TV312
【引證文獻(xiàn)】
相關(guān)期刊論文 前2條
1 朱勝;伍鶴皋;肖平西;劉建;侯攀;羅乾坤;;水電站廠房結(jié)構(gòu)梁板柱系統(tǒng)動(dòng)力特性研究[J];水利水電技術(shù);2017年09期
2 衛(wèi)洋波;陳婧;馬震岳;;抽水蓄能電站地下主副廠房振動(dòng)傳遞途徑研究[J];水利與建筑工程學(xué)報(bào);2017年04期
，本文編號(hào)：2470504
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