【摘要】：為了探究復(fù)合材料空間桁架橋中關(guān)鍵節(jié)點預(yù)緊力齒連接接頭在多向受力狀態(tài)下的應(yīng)力分布,對復(fù)合材料空間桁架橋建立多尺度有限元模型。該多尺度模型不僅可以同時獲得桁架橋整體結(jié)構(gòu)性能與局部接頭應(yīng)力狀態(tài),還可以有效反映兩者的相互作用關(guān)系。通過該模型,對接頭在多向受力狀態(tài)下的應(yīng)力分布展開研究,研究表明:預(yù)緊力齒接頭受力之后,齒面正應(yīng)力較過盈裝配完成時有5 MPa以內(nèi)的衰減;且多向受力接頭較單向受力接頭衰減緩和,衰減后多向受力接頭齒面正應(yīng)力略高于單向受力接頭齒面正應(yīng)力;多向受力接頭各齒荷載分配比例與單向受力基本一致,均為兩側(cè)高中間低;多向受力接頭復(fù)合材料管橫向剪切應(yīng)力較單向受力接頭有一定增大,但最不利荷載工況下的橫向剪切應(yīng)力為15.7 MPa,遠(yuǎn)小于材料橫向剪切強度,接頭處于安全狀態(tài)。所得結(jié)果可為復(fù)合材料預(yù)緊力齒接頭設(shè)計提供參考依據(jù)。
[Abstract]:In order to study the stress distribution of the key joints of the composite space truss bridge under multi-direction stress, a multi-scale finite element model was established for the composite space truss bridge. The multi-scale model can not only obtain the global structural performance of truss bridge and the stress state of local joints simultaneously, but also reflect the interaction between them. Through this model, the stress distribution of the joint under multi-direction loading is studied. The results show that the normal stress on the tooth surface decreases within 5 MPa after the pretension force joint is finished. Compared with unidirectional joint, the normal stress of multidirectional joint is slightly higher than that of unidirectional joint. The load distribution ratio of each tooth of multi-directional joint is basically the same as that of unidirectional force, and it is both high and middle low on both sides. The transverse shear stress of multidirectional joint composite tube is higher than that of unidirectional joint, but the transverse shear stress of 15.7 MPa, under the most unfavorable load condition is much smaller than the transverse shear strength of the material, and the joint is in a safe state. The results can provide a reference for the design of composite pretightening tooth joint.
【作者單位】： 解放軍理工大學(xué)野戰(zhàn)工程學(xué)院;南京工業(yè)大學(xué)機械與動力工程學(xué)院;解放軍后勤工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(11372355)
【分類號】：U441

【相似文獻】

相關(guān)期刊論文 前10條

1 倪葉明;淺論螺栓連接預(yù)緊力的大小及其實施方法[J];港口科技動態(tài);2000年12期

2 郭強;趙玫;魏來生;;管道連接預(yù)緊力對管道端面密封的影響[J];液壓氣動與密封;2006年03期

3 張鎮(zhèn)生 ,楊仲民 ,林海鵬;光彈性方法在自行車車體和接頭應(yīng)力分析中的應(yīng)用[J];力學(xué)與實踐;1983年03期

4 萬波;趙浩;;管道設(shè)計中的應(yīng)力分析[J];廣東化工;2013年05期

5 孫洪亮;王慧東;;松花江大橋0~#塊空間應(yīng)力分析[J];石家莊鐵道學(xué)院學(xué)報;2007年02期

6 李旺豐;;V形支撐結(jié)構(gòu)施工階段的空間應(yīng)力分析[J];北方交通;2008年06期

7 馬s，

本文編號：2410955