【摘要】：張拉載荷下導(dǎo)線的應(yīng)力分布以及拉伸剛度的變化情況體現(xiàn)了導(dǎo)線的力學(xué)性能。本文采用理論計(jì)算方法、有限元仿真方法以及試驗(yàn)測(cè)量方法,以LGJ-300/25型鋼芯鋁絞線固定端情況為例,對(duì)張拉載荷下導(dǎo)線的應(yīng)力及剛度進(jìn)行研究。理論計(jì)算部分,建立股線的受力平衡方程,得到張拉導(dǎo)線的載荷、應(yīng)力分布情況以及截面拉伸剛度理論值;在此基礎(chǔ)上,考慮導(dǎo)線溫度變化對(duì)導(dǎo)線線材變形的影響,得出不同條件下溫度對(duì)導(dǎo)線應(yīng)力、應(yīng)變及載荷的影響。有限元仿真部分,利用導(dǎo)線的螺旋對(duì)稱特點(diǎn),建立導(dǎo)線單股線模型,根據(jù)模型中相應(yīng)節(jié)點(diǎn)的位移關(guān)系,建立節(jié)點(diǎn)組之間的約束方程,并根據(jù)約束方程施加邊界條件及載荷,從而縮小模型的計(jì)算規(guī)模,節(jié)約計(jì)算時(shí)間。試驗(yàn)測(cè)量部分,根據(jù)鋼芯鋁絞線拉伸剛度的測(cè)量原理,設(shè)計(jì)安裝了導(dǎo)線拉伸試驗(yàn)測(cè)量裝置,給出了拉伸剛度的具體試驗(yàn)測(cè)量方法,完成了導(dǎo)線的拉伸試驗(yàn)測(cè)量,并對(duì)試驗(yàn)操作的過(guò)程進(jìn)行了詳細(xì)的描述,得到導(dǎo)線的載荷-應(yīng)變曲線。研究結(jié)果表明:(1)導(dǎo)線中心直鋼線與6根層鋼線為線接觸,接觸面積大,擠壓應(yīng)力最小,其他各層股線之間的接觸區(qū)域?yàn)辄c(diǎn)接觸,擠壓應(yīng)力由內(nèi)而外逐漸減小;導(dǎo)線橫截面上各層股線承受的載荷及應(yīng)力呈現(xiàn)由內(nèi)而外減小趨勢(shì);隨著導(dǎo)線溫度的升高,鋁股線承受的載荷相對(duì)減小,最內(nèi)層鋁股線的載荷及應(yīng)力最先減小為零。(2)在拉伸載荷作用初期,導(dǎo)線截面拉伸剛度略微增加,隨著載荷增大,鋁股線發(fā)生塑性變形,導(dǎo)線截面拉伸剛度開始急劇減小。
[Abstract]:The stress distribution and tensile stiffness of conductors under tension load reflect the mechanical properties of conductors. In this paper, the stress and stiffness of conductors under tension load are studied by using theoretical calculation method, finite element simulation method and experimental measurement method, taking the fixed end of LGJ-300/ 25 steel core aluminum strand as an example. In the part of theoretical calculation, the stress balance equation of the strand is established, and the load, stress distribution and the theoretical value of the tensile stiffness of the section are obtained. On this basis, considering the influence of wire temperature change on wire rod deformation, the influence of temperature on conductor stress, strain and load under different conditions is obtained. In the finite element simulation part, according to the spiral symmetry characteristics of the conductor, the single strand model of the conductor is established. According to the displacement relationship of the corresponding nodes in the model, the constraint equation between the node groups is established, and the boundary conditions and loads are applied according to the constraint equation. Thus, the calculation scale of the model is reduced and the calculation time is saved. In the part of test and measurement, according to the measuring principle of tensile stiffness of steel core aluminum strand, a measuring device for conductor tensile test is designed and installed, the concrete test and measurement method of tensile stiffness is given, and the tensile test measurement of conductor is completed. The process of test operation is described in detail, and the load-strain curve of conductor is obtained. The results show that: (1) the straight wire in the center of the conductor is in contact with six steel wires, the contact area is large, the extrusion stress is the smallest, the contact area between the other strands is point contact, and the extrusion stress decreases gradually from inside to outside; The load and stress of each layer of strands on the cross section of the conductor show a decreasing trend from inside to outside. With the increase of conductor temperature, the load of aluminum strand decreases relatively, and the load and stress of innermost aluminum strand decrease to zero at first. (2) in the initial stage of tensile load, the tensile stiffness of conductor section increases slightly, and with the increase of load, The plastic deformation of aluminum strand occurs, and the tensile stiffness of wire section begins to decrease sharply.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM751

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 黃欲成;陳池;汪峰;趙全江;柏曉路;文曉旭;;大跨越架空輸電導(dǎo)線鋼芯鋁股應(yīng)力分布特性研究[J];三峽大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年04期

2 董玉明;萬(wàn)建成;王孟;司佳鈞;劉龍;楊光甫;;擴(kuò)徑導(dǎo)線在扭轉(zhuǎn)載荷下股線應(yīng)力的有限元分析[J];電力科學(xué)與工程;2015年11期

3 林建華;曾偉;;架空導(dǎo)線用鋼芯鋁絞線張力分層特性研究[J];電線電纜;2015年04期

4 萬(wàn)建成;董玉明;楊文剛;司佳鈞;劉龍;張秋樺;;擴(kuò)徑導(dǎo)線的參數(shù)化有限元建模[J];電力科學(xué)與工程;2015年07期

5 董玉明;萬(wàn)建成;王孟;司佳鈞;劉龍;楊光甫;;擴(kuò)徑導(dǎo)線在張拉載荷下的股線分層應(yīng)力計(jì)算[J];電力科學(xué)與工程;2015年07期

6 劉玉輝;寇子明;吳娟;吳國(guó)雄;;單捻鋼絲繩股內(nèi)鋼絲應(yīng)力分布研究[J];礦山機(jī)械;2014年02期

7 馬行馳;何大海;朱瑞;;ACSR-720/50型架空導(dǎo)線單股應(yīng)力狀態(tài)分析[J];電線電纜;2013年03期

8 烏慧霞;郭海森;何麗;;臥式拉力試驗(yàn)機(jī)的研制及鋼絲繩拉伸試驗(yàn)方法探討[J];工程與試驗(yàn);2011年S1期

9 趙新澤;高偉;秦紅玲;;絞制線鄰層線股間接觸分析[J];中國(guó)機(jī)械工程;2011年16期

10 趙新澤;周權(quán);;LGJ150/25型鋼芯鋁絞線股線間接觸有限元分析[J];制造業(yè)自動(dòng)化;2011年11期

相關(guān)會(huì)議論文 前1條

1 李時(shí)新;;2008年貴州110kV送電線路覆冰倒桿(塔)、斷線、冰閃事故調(diào)查分析[A];2008年抗冰保電優(yōu)秀論文集[C];2008年

相關(guān)碩士學(xué)位論文 前3條

1 楊光甫;鋼芯鋁絞線等效彎曲剛度研究[D];華北電力大學(xué);2015年

2 鞏鑫龍;架空線彎曲剛度的實(shí)驗(yàn)研究[D];華北電力大學(xué);2013年

3 蔡斯特;輸電導(dǎo)線強(qiáng)度的數(shù)值分析方法初步研究[D];華北電力大學(xué)（北京）;2010年

，

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