本文選題：螺栓連接　切入點：結(jié)合面　出處：《西安交通大學(xué)學(xué)報》2017年12期

【摘要】：為了改善螺栓連接結(jié)構(gòu)的連接性能,以螺栓連接結(jié)合面作為研究對象,針對結(jié)合面接觸壓力分布以及有效接觸面積,對結(jié)合面形狀進(jìn)行了主動設(shè)計研究。首先,利用有限元方法,將彈性體的接觸界面離散化,從接觸界面節(jié)點出發(fā),建立了彈性接觸問題數(shù)學(xué)模型,將界面節(jié)點處的接觸間隙和接觸壓力的關(guān)系轉(zhuǎn)化為數(shù)學(xué)規(guī)劃問題。然后,利用該模型,提出一種以螺栓接觸壓力分布或有效接觸面積等接觸性能作為設(shè)計目標(biāo)的螺栓連接結(jié)合面形狀主動設(shè)計方法,通過改變結(jié)合面的表面形狀即表面各節(jié)點處的接觸間隙,實現(xiàn)改善螺栓連接接觸性能的效果。最后,借助ANSYS參數(shù)化設(shè)計語言,將設(shè)計方法流程化,建立了單螺栓連接、法蘭盤連接的分析案例,對主動設(shè)計以及增加連接件厚度的方法進(jìn)行了對比分析。結(jié)果表明,該設(shè)計方法可降低接觸壓力的峰值和分布離散度,增加有效接觸面積,與增加連接件厚度的方法相比,在同樣的接觸性能目標(biāo)下還能保證連接結(jié)構(gòu)的固有頻率不下降,從而驗證了所提主動設(shè)計方法的可行性和有效性。
[Abstract]:In order to improve the connection performance of the bolted connection structure, the contact pressure distribution and effective contact area of the bolted connection surface are studied in this paper. Firstly, the shape of the joint surface is studied. Using finite element method, the contact interface of elastic body is discretized, and the mathematical model of elastic contact problem is established from the contact interface node. The relationship between contact gap and contact pressure at the interface joint is transformed into a mathematical programming problem. Using this model, an active design method of bolt joint joint shape is proposed, which takes contact performance such as contact pressure distribution or effective contact area of bolt as the design objective. By changing the surface shape of the bonding surface, that is, the contact gap between the joints of the surface, the effect of improving the contact performance of the bolt connection is realized. Finally, with the help of the ANSYS parametric design language, the design method is flow through and the single bolt connection is established. The analysis cases of flange connection are compared and analyzed. The results show that the design method can reduce the peak value and distribution dispersion of contact pressure and increase the effective contact area. Compared with the method of increasing the thickness of connectors, the natural frequency of the connection structure can not be decreased under the same contact performance target, which verifies the feasibility and validity of the proposed active design method.
【作者單位】： 西安交通大學(xué)現(xiàn)代設(shè)計及轉(zhuǎn)子軸承系統(tǒng)教育部重點實驗室;蘭州理工大學(xué)機(jī)電工程學(xué)院;西安交通大學(xué)化學(xué)工程與技術(shù)學(xué)院;湖南科技大學(xué)機(jī)電工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(51635010) 湖南省自然科學(xué)基金資助項目(2015JJ2054) 湖南省教育廳科學(xué)研究資助項目(14C0435)
【分類號】：TH131.3

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本文編號：1657896