發(fā)布時(shí)間：2017-12-31 04:26

  本文關(guān)鍵詞：飛行器對(duì)接框接觸界面的等效模型及剛度特性　出處：《機(jī)械設(shè)計(jì)與研究》2016年02期 　論文類型：期刊論文

  更多相關(guān)文章： 空間對(duì)接框 雙彈簧模型 Hertz接觸理論 接觸剛度 變載荷

【摘要】：針對(duì)空間飛行器對(duì)接框結(jié)構(gòu)工作時(shí)拉壓載荷特點(diǎn),采用周向雙彈簧等效接觸模型進(jìn)行對(duì)接框接觸界面剛度等效,建立對(duì)接框結(jié)構(gòu)在壓力載荷和彎矩載荷作用下結(jié)構(gòu)的接觸界面剛度計(jì)算解析模型�；趶椥粤W(xué)和Hertz及分形理論分別推導(dǎo)了對(duì)接框鎖鉤與接觸面等效彈簧剛度,研究了變載荷作用下對(duì)接框接觸界面剛度的變化特性,并利用對(duì)接試驗(yàn)平臺(tái)對(duì)剛度模型進(jìn)行了驗(yàn)證。結(jié)果表明:對(duì)接框在受壓力載荷時(shí)剛度隨載荷非連續(xù)增加,在載荷與預(yù)緊力相等時(shí)接觸界面剛度發(fā)生突變;彎矩載荷時(shí)剛度隨載荷的增加而接近于線性增大。該結(jié)果可為空間飛行器動(dòng)力學(xué)特性分析中接觸界面剛度等效提供參考。
[Abstract]:According to the characteristics of tension and compression load on the docking frame structure of space vehicle, the contact interface stiffness of the docking frame is equivalent by using the circumferential double spring equivalent contact model. An analytical model for calculating the contact interface stiffness of a docked frame structure under pressure and bending moment loads is established. Based on elastic mechanics, Hertz and fractal theory, the equivalent projectile between the hook and the contact surface of the docking frame is derived, respectively. Spring stiffness. The change characteristics of the contact interface stiffness of the docking frame under variable load are studied, and the stiffness model is verified by using the docking test platform. The results show that the stiffness of the docking frame increases with the load discontinuous under the pressure load. When the load is equal to the pretightening force, the contact interface stiffness changes. The stiffness increases linearly with the increase of the load, and the results can provide a reference for the equivalent stiffness of the contact interface in the analysis of the dynamic characteristics of the spacecraft.
【作者單位】： 上海交通大學(xué)上海市復(fù)雜薄板結(jié)構(gòu)數(shù)字化制造重點(diǎn)實(shí)驗(yàn)室;上海宇航系統(tǒng)工程研究所;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51275292)
【分類號(hào)】：V414
【正文快照】： 飛行器對(duì)接框型結(jié)構(gòu)主要是實(shí)現(xiàn)主被動(dòng)飛行器的對(duì)接,同時(shí)也在飛行過(guò)程中保證兩飛行器的連接與密封。在變軌過(guò)程中由于載荷突變和接觸界面之間的剛度變化引起結(jié)構(gòu)變形的不可預(yù)測(cè)性,而飛行器尺寸和速度很大,微小的變形會(huì)引起整個(gè)飛行器的位姿發(fā)生變化,因此研究接觸界面的剛度等效，

本文編號(hào)：1358121