本文關(guān)鍵詞：空間網(wǎng)格結(jié)構(gòu)鋼管—焊接空心球懸掛吊點(diǎn)靜力及常幅疲勞性能試驗(yàn)和理論研究　出處：《太原理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 疲勞 空間網(wǎng)格結(jié)構(gòu) 懸掛吊點(diǎn) 鋼管—焊接空心球節(jié)點(diǎn) 有限元分析

【摘要】：焊接空心球節(jié)點(diǎn)網(wǎng)格結(jié)構(gòu)由于其跨度大、受力合理及施工方便等特點(diǎn)被廣泛應(yīng)用于工業(yè)建筑,尤其是帶懸掛吊車(chē)的工業(yè)廠房中。由于懸掛吊車(chē)的作用產(chǎn)生反復(fù)交變荷載,網(wǎng)格結(jié)構(gòu)及懸掛吊點(diǎn)可能產(chǎn)生疲勞破壞。網(wǎng)格結(jié)構(gòu)的研究主要集中在其靜力性能等方面,而對(duì)其節(jié)點(diǎn)疲勞性能研究相對(duì)不成熟,致使國(guó)家現(xiàn)行相關(guān)規(guī)范對(duì)此規(guī)定仍不完善。本文在國(guó)家自然科學(xué)基金項(xiàng)目(51578357)和山西省自然科學(xué)基金項(xiàng)目(2015011062)的聯(lián)合資助下,針對(duì)常用的懸掛吊點(diǎn)——“鋼管—焊接空心球”節(jié)點(diǎn)(簡(jiǎn)稱“管—球”節(jié)點(diǎn))進(jìn)行靜力及常幅疲勞的試驗(yàn)與理論研究,主要研究工作和結(jié)論如下:(1)基于太原周邊實(shí)地調(diào)研,結(jié)合懸掛吊點(diǎn)相關(guān)的設(shè)計(jì)規(guī)范和手冊(cè)等,采用正交試驗(yàn)設(shè)計(jì)方法,以焊接空心球直徑D、焊接空心球壁厚T、鋼管直徑d、鋼管壁厚t四個(gè)因素為變量,各個(gè)變量均按三個(gè)水平考慮,設(shè)計(jì)并加工完成9個(gè)節(jié)點(diǎn)試件。(2)采用MTS試驗(yàn)機(jī)進(jìn)行了8個(gè)節(jié)點(diǎn)試件的靜力性能試驗(yàn),并采用有限元分析軟件ANSYS、ABAQUS進(jìn)行了9個(gè)試件的靜力分析,摸清了該類節(jié)點(diǎn)的應(yīng)力分布規(guī)律并取得了熱點(diǎn)應(yīng)力所在位置;針對(duì)“管—球”節(jié)點(diǎn)應(yīng)力集中的主要因素進(jìn)行分析討論,得到了不同因素對(duì)其影響程度和相關(guān)性;建立了考慮焊縫焊腳尺寸折減效應(yīng)的節(jié)點(diǎn)熱點(diǎn)應(yīng)力集中系數(shù)的計(jì)算公式。(3)采用MTS試驗(yàn)機(jī)完成了8個(gè)“管—球”節(jié)點(diǎn)在較高應(yīng)力幅作用下的常幅疲勞性能試驗(yàn),獲得了8個(gè)有效常幅疲勞試驗(yàn)數(shù)據(jù)點(diǎn);并計(jì)算得出其節(jié)點(diǎn)名義允許應(yīng)力幅[]62 10?100.02MPa?(35)(28)。(4)采用斷裂力學(xué)方法,對(duì)“管—球”節(jié)點(diǎn)進(jìn)行常幅疲勞壽命估算,估算所得其理論疲勞壽命值低于試驗(yàn)疲勞壽命值;重點(diǎn)探討了裂紋不同初始長(zhǎng)度對(duì)裂紋擴(kuò)展壽命的影響,得出了若初始裂紋尺寸增大十倍,則裂紋的疲勞擴(kuò)展壽命縮短80%左右。(5)采用有限元軟件ABAQUS的XFEM技術(shù),選擇代表性“管—球”節(jié)點(diǎn)進(jìn)行有限元分析,得出了單次循環(huán)下裂紋出現(xiàn)位置和擴(kuò)展方向;對(duì)比節(jié)點(diǎn)試驗(yàn)結(jié)果,提出了該類節(jié)點(diǎn)常幅疲勞試驗(yàn)關(guān)鍵控制參數(shù)的建議值:產(chǎn)生裂紋的參考位移值設(shè)置為5%(35)U,失效位移參考值設(shè)置為10%(35)U。
[Abstract]:The grid structure of welded hollow spherical joints is widely used in industrial buildings because of its large span, reasonable force and convenient construction. Especially in industrial buildings with suspended cranes, repeated alternating loads are produced due to the action of hoisting cranes. Grid structure and suspension point may cause fatigue damage. The research of grid structure is mainly focused on its static performance, but the research on fatigue performance of its joints is relatively immature. As a result, the relevant national regulations are still not perfect. This paper is in the project of National Natural Science Foundation of China (51578357) and the Natural Science Foundation of Shanxi Province (2015011062). With co-financing. The static and constant amplitude fatigue tests and theoretical studies were carried out for the common hanging point "tube-welded hollow sphere" joint (referred to as "pipe-ball" joint). The main research work and conclusions are as follows: (1) based on the field investigation around Taiyuan, combined with the relevant design specifications and manuals of suspension point, the orthogonal design method is adopted to weld the diameter of hollow sphere D. Four factors such as thickness of welded hollow sphere T, diameter of steel tube d, thickness of steel tube wall t are variables, each variable is considered according to three levels. The static performance tests of 8 joints specimens were carried out by MTS test machine, and the finite element analysis software ANSYS was used. ABAQUS made the static analysis of 9 specimens, found out the stress distribution law of this kind of joint and obtained the hot spot stress location. The main factors of stress concentration in "tube-ball" joints are analyzed and discussed, and the influence degree and correlation of different factors on the stress concentration are obtained. A formula for calculating hot spot stress concentration factor of joints considering dimension reduction effect of weld welding foot is established. The constant amplitude fatigue performance tests of eight tube-ball joints under high stress amplitude were carried out by using MTS test machine. Eight effective constant amplitude fatigue test data points are obtained. The nominal allowable stress amplitude of the joint is calculated. [] 62 10? 100.02MPa? By using fracture mechanics method, the fatigue life of "tube-ball" joint is estimated in constant amplitude, and the estimated theoretical fatigue life is lower than that of experimental fatigue life. The effect of different initial length of crack on crack propagation life is discussed, and it is concluded that if the initial crack size is increased by 10 times. The fatigue growth life of the crack is shortened by about 80%.) the representative "tube-ball" joints are selected for finite element analysis by using the XFEM technology of the finite element software ABAQUS. The location and propagation direction of the crack under a single cycle are obtained. Compared with the test results of the joints, the suggested values of the key control parameters of the joints in constant amplitude fatigue test are proposed: the reference displacement value of the crack is set to 5 / 35 U. The reference value of the failure displacement is set to 10 ~ 35U.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU399

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張君男;殷之平;黃其青;屈展;李國(guó)峰;;基于損傷力學(xué)方法的鉚接結(jié)構(gòu)疲勞壽命預(yù)估[J];應(yīng)用力學(xué)學(xué)報(bào);2013年05期

2 李煒;李華軍;鄭永明;周永;;海上風(fēng)電基礎(chǔ)結(jié)構(gòu)疲勞壽命分析[J];水利水運(yùn)工程學(xué)報(bào);2011年03期

3 劉瑞江;張業(yè)旺;聞崇煒;湯建;;正交試驗(yàn)設(shè)計(jì)和分析方法研究[J];實(shí)驗(yàn)技術(shù)與管理;2010年09期

4 董石麟;;中國(guó)空間結(jié)構(gòu)的發(fā)展與展望[J];建筑結(jié)構(gòu)學(xué)報(bào);2010年06期

5 吳曉;羅薇;劉璐;黃園園;;在役橋(門(mén))式起重機(jī)金屬結(jié)構(gòu)疲勞壽命預(yù)測(cè)分析[J];中國(guó)安全科學(xué)學(xué)報(bào);2010年02期

6 孫建偉;上官艷秋;;德國(guó)漢諾威高鐵出軌事故的機(jī)理分析[J];安全;2009年05期

7 袁熙;李舜酩;;疲勞壽命預(yù)測(cè)方法的研究現(xiàn)狀與發(fā)展[J];航空制造技術(shù);2005年12期

8 宋寅;關(guān)于起重機(jī)鋼結(jié)構(gòu)疲勞計(jì)算的討論[J];鐵道貨運(yùn);2003年04期

9 張朋,李梅山,孟憲頤,王凱輝,方家惠,高玉華;塔式起重機(jī)鋼結(jié)構(gòu)疲勞壽命估算[J];建筑機(jī)械;2000年05期

10 卓均之;吊車(chē)梁K型對(duì)接焊縫焊角尺寸疲勞性能試驗(yàn)研究[J];鋼結(jié)構(gòu);1999年04期

相關(guān)會(huì)議論文 前1條

1 雷宏剛;董超;尹德鈺;;螺栓球節(jié)點(diǎn)網(wǎng)架疲勞載荷譜的理論研究[A];第十屆空間結(jié)構(gòu)學(xué)術(shù)會(huì)議論文集[C];2002年

相關(guān)博士學(xué)位論文 前3條

1 焦晉峰;平板網(wǎng)架結(jié)構(gòu)十字形板—焊接空心球連接疲勞性能的理論與試驗(yàn)研究[D];太原理工大學(xué);2013年

2 閆亞杰;空間網(wǎng)格結(jié)構(gòu)中鋼管—焊接空心球連接節(jié)點(diǎn)疲勞性能的理論與試驗(yàn)研究[D];太原理工大學(xué);2013年

3 馮國(guó)慶;船舶結(jié)構(gòu)疲勞強(qiáng)度評(píng)估方法研究[D];哈爾濱工程大學(xué);2006年

相關(guān)碩士學(xué)位論文 前10條

1 張超;網(wǎng)架結(jié)構(gòu)中M30高強(qiáng)度螺栓的疲勞性能分析與試驗(yàn)研究[D];太原理工大學(xué);2016年

2 王亞兵;在役螺栓球網(wǎng)架結(jié)構(gòu)M22高強(qiáng)螺栓的疲勞分析與試驗(yàn)研究[D];太原理工大學(xué);2015年

3 李彩霞;基于擴(kuò)展有限元法的裂紋擴(kuò)展分析研究[D];西南交通大學(xué);2015年

4 楊旭;鋼管—焊接空心球連接節(jié)點(diǎn)的應(yīng)力集中與疲勞壽命研究[D];太原理工大學(xué);2013年

5 武進(jìn)福;焊接鋼結(jié)構(gòu)疲勞理論及實(shí)驗(yàn)研究[D];太原科技大學(xué);2011年

6 付強(qiáng);平板網(wǎng)架結(jié)構(gòu)疲勞實(shí)用計(jì)算方法的研究[D];太原理工大學(xué);2010年

7 楊曉東;網(wǎng)架結(jié)構(gòu)節(jié)點(diǎn)疲勞試驗(yàn)設(shè)計(jì)及數(shù)據(jù)分析[D];太原理工大學(xué);2008年

8 焦晉峰;基于累積損傷及斷裂力學(xué)理論的高強(qiáng)螺栓疲勞壽命估算[D];太原理工大學(xué);2005年

9 閆亞杰;螺栓球節(jié)點(diǎn)網(wǎng)架疲勞性能的試驗(yàn)研究[D];太原理工大學(xué);2003年

10 韓蕓;疲勞壽命在強(qiáng)度穩(wěn)定綜合理論中的運(yùn)算[D];哈爾濱工程大學(xué);2003年

，

本文編號(hào)：1389107