發(fā)布時(shí)間：2018-05-29 12:38

  本文選題：絕對(duì)節(jié)點(diǎn)坐標(biāo)方法 + 纖維繩索　； 參考：《航空學(xué)報(bào)》2017年04期

【摘要】：傳統(tǒng)絕對(duì)節(jié)點(diǎn)坐標(biāo)方法(ANCF)繩索模型是基于梁?jiǎn)卧⒌?其不能反映纖維繩索的不可抗壓和松弛特性�？紤]纖維繩索初始松弛余量,給出了繩索非線(xiàn)性軸向應(yīng)力-應(yīng)變關(guān)系。繩索在松弛狀態(tài)下軸向力接近于零,在張緊狀態(tài)下表現(xiàn)出線(xiàn)彈性特性。在此基礎(chǔ)上,采用絕對(duì)節(jié)點(diǎn)坐標(biāo)方法推導(dǎo)了松弛繩索動(dòng)力學(xué)模型。通過(guò)靜力學(xué)和動(dòng)力學(xué)仿真,將傳統(tǒng)繩索模型和松弛繩索模型進(jìn)行對(duì)比,結(jié)果表明:在重力及不同集中載荷作用下,松弛繩索相比于傳統(tǒng)繩索都具有更大的變形;分析移除集中載荷后繩索的動(dòng)力學(xué)響應(yīng)可知,傳統(tǒng)繩索在振動(dòng)過(guò)程中始終處于張緊狀態(tài),且繩索上各點(diǎn)振動(dòng)同步,而松弛繩索會(huì)在張緊和松弛狀態(tài)之間不斷轉(zhuǎn)換,繩索上各點(diǎn)的振動(dòng)存在相位差,能夠更好地反映繩索在松弛狀態(tài)下的動(dòng)力學(xué)特性。
[Abstract]:The traditional absolute node coordinate method (ANCFC) rope model is based on the beam element, which can not reflect the non-compressive and relaxation characteristics of the fiber rope. Considering the initial relaxation margin of the fiber rope, the nonlinear axial stress-strain relationship of the rope is given. The axial force of the rope is close to zero in the relaxation state, and the linear elastic property is shown in the tensioning state. On this basis, the relaxation rope dynamic model is derived by using the absolute node coordinate method. Through static and dynamic simulation, the traditional rope model and the relaxation rope model are compared. The results show that the relaxation rope has more deformation than the traditional rope under the action of gravity and different concentrated loads. By analyzing the dynamic response of the rope after removing the concentrated load, it can be seen that the traditional rope is always in the state of tension during vibration, and the vibration of all points on the rope is synchronized, and the relaxation rope will change between the tension and the relaxation state. There is phase difference in the vibration of each point on the rope, which can better reflect the dynamic characteristics of the rope in the relaxed state.
【作者單位】： 哈爾濱工業(yè)大學(xué)航天工程系;北京空間飛行器總體設(shè)計(jì)部;上海宇航系統(tǒng)工程研究所;
【基金】：國(guó)家“973”計(jì)劃(2013CB733004) 上海市優(yōu)秀學(xué)科帶頭人計(jì)劃(14XD1423300)~~
【分類(lèi)號(hào)】：TB122

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1 常漢江;劉鋮;田強(qiáng);胡海巖;;幾何精確的ANCF三角形殼單元[A];北京力學(xué)會(huì)第20屆學(xué)術(shù)年會(huì)論文集[C];2014年

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本文編號(hào)：1950904