本文選題：輸電線路　切入點(diǎn)：張力架線　出處：《東北電力大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：張力放線施工是架空輸電線路施工技術(shù)中頗為重要的一道工序,從人力展放導(dǎo)引繩逐步發(fā)展為采用動(dòng)力傘、無(wú)人機(jī)等方式展放導(dǎo)引繩。架設(shè)施工現(xiàn)場(chǎng)復(fù)雜多變,施工涉及面積大從而沒(méi)有辦法進(jìn)行完整架線過(guò)程的試驗(yàn)。人為計(jì)算施工參數(shù)可能會(huì)造成資源浪費(fèi)或忽視潛在的危險(xiǎn)�，F(xiàn)有的線路架設(shè)仿真系統(tǒng),是將傳統(tǒng)理論公式計(jì)算的結(jié)果呈現(xiàn)于圖紙之上,而針對(duì)導(dǎo)線、滑輪動(dòng)態(tài)特性的研究較為少見(jiàn)。本文以淮南-南京-上海1000kV特高壓跨越段輸電線路工程為研究背景,針對(duì)該線路進(jìn)行架線施工方案的編制,并利用動(dòng)力學(xué)軟件對(duì)架線段施工進(jìn)行動(dòng)態(tài)仿真,分析導(dǎo)線過(guò)滑輪的動(dòng)態(tài)特性,為實(shí)際施工提供參考性建議。本文根據(jù)1000kV多分裂導(dǎo)線施工的特點(diǎn),基于施工現(xiàn)場(chǎng)的具體情況編制特高壓架線施工方案,主要包括施工的場(chǎng)地布置、主要施工工藝與工序的介紹以及對(duì)施工所用的機(jī)械和設(shè)備進(jìn)行相關(guān)的計(jì)算。利用ADAMS虛擬樣機(jī)技術(shù),對(duì)張力架線系統(tǒng)進(jìn)行仿真模擬。大變形柔性體導(dǎo)線和牽引繩的建模采用的是軸套力方法,編寫(xiě)命令流語(yǔ)言可以實(shí)現(xiàn)快速建模。通過(guò)適當(dāng)?shù)木?jiǎn)模型和減少接觸力的數(shù)目來(lái)實(shí)現(xiàn)仿真速度的優(yōu)化。通過(guò)對(duì)跨越段進(jìn)行牽引系統(tǒng)的動(dòng)力學(xué)仿真,提取導(dǎo)線及牽引繩的軸向張力,放線滑車(chē)的豎向、橫向荷載以及與牽引板的碰撞力,研究系統(tǒng)的動(dòng)態(tài)特性便于確定導(dǎo)線、牽引繩最大張力出現(xiàn)的時(shí)間和位置。仿真提取結(jié)果與理論公式計(jì)算結(jié)果相比較,誤差在5%左右。牽引繩、導(dǎo)線的軸向速度均維持在1m/s,當(dāng)牽引板通過(guò)滑輪時(shí)軸向張力和碰撞力均會(huì)驟增。本文最后還對(duì)架線過(guò)程中導(dǎo)線在扭轉(zhuǎn)載荷下的應(yīng)力進(jìn)行了有限元模擬,分析導(dǎo)線在架線過(guò)程中應(yīng)力的變化。本文較為全面地總結(jié)了1000kV特高壓張力展放多分裂、大截面導(dǎo)線的流程和作業(yè)方法,可以為施工人員在今后的特高壓多分裂導(dǎo)線張力放線的架線方案制定中提供參考。仿真起始時(shí),導(dǎo)線、牽引繩瞬時(shí)張力變大,高出導(dǎo)線正常張力2倍左右,整體穩(wěn)定性較差,會(huì)對(duì)整個(gè)架線系統(tǒng)產(chǎn)生較大沖擊。牽引板與滑車(chē)碰撞力也達(dá)到23kN,會(huì)對(duì)桿塔造成一定的沖擊,在牽引板接近滑車(chē)時(shí)應(yīng)減速緩慢通過(guò)。通過(guò)本文的模擬仿真,便于發(fā)現(xiàn)施工中潛在的危險(xiǎn),以便在實(shí)際施工操作中調(diào)整張牽設(shè)備的牽引力,更好地實(shí)現(xiàn)機(jī)械化作業(yè),可以較為科學(xué)地指導(dǎo)實(shí)際施工操作。
[Abstract]:Tension laying out construction is a very important working procedure in overhead transmission line construction technology. It has gradually developed from manual deployment and guidance rope to use power umbrella, UAV and so on. The construction site is complex and changeable. Construction involves a large area so that there is no way to conduct the test of a complete wiring erection process. Artificial calculation of construction parameters may result in waste of resources or neglect of potential dangers. Existing line erection simulation systems, The results of the traditional theoretical formulas are presented on the drawings, but the dynamic characteristics of the conductors and pulleys are seldom studied. This paper takes the Huainan Nanjing Shanghai 1000kV UHV transmission line project as the research background. According to the compilation of the construction scheme of the wire, the dynamic simulation of the construction of the frame line segment is carried out by using the dynamic software, and the dynamic characteristics of the conductor passing through the pulley are analyzed. According to the construction characteristics of 1000kV multi-splitting conductors and based on the concrete conditions of the construction site, the construction scheme of UHV wire erection is worked out, which mainly includes the site layout of the construction. Introduction of main construction technology and process, and calculation of machinery and equipment used in construction. Using ADAMS virtual prototyping technology, The large deformation flexible body conductors and towing ropes are modeled by using the axle-sleeve force method. The command flow language can be used to realize fast modeling, to optimize the simulation speed by reducing the number of contact forces and to reduce the number of contact forces. The axial tension of the wire and the traction rope, the vertical and lateral load of the emitter pulley and the collision force with the traction board are extracted. The study of the dynamic characteristics of the system facilitates the determination of the conductor. The time and position of maximum tension of traction rope. Compared with the result of theoretical formula, the error is about 5%. The axial velocities of the conductors are maintained at 1 m / s, and the axial tension and collision force increase sharply when the traction plate passes through the pulley. Finally, the stress of the conductor under the torsional load is simulated by finite element method. In this paper, the flow and working methods of 1000 kV UHV tension expansion and discharge with multi-splitting and large-section conductors are summarized. It can be used as a reference for the construction personnel in the future development of the cable stringing scheme of UHV multi-splitting wire tension. At the beginning of the simulation, the instantaneous tension of the wire and the traction rope becomes larger, which is about 2 times higher than the normal tension of the wire, and the overall stability is poor. The collision force between the traction board and the pulley will reach 23kNs, which will cause a certain impact on the pole tower. When the traction plate approaches the pulley, it should slow down and pass slowly. Through the simulation of this paper, It is convenient to find the potential danger in construction so as to adjust the traction force of the tensioning equipment in the actual construction operation, to realize mechanized operation better, and to guide the actual construction operation more scientifically.
【學(xué)位授予單位】：東北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM752

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