本文選題：鉚釘連接　切入點(diǎn)：界面接觸　出處：《固體火箭技術(shù)》2017年02期 　論文類型：期刊論文

【摘要】：針對(duì)CVI工藝下復(fù)合材料典型鉚接板,提出一種適合復(fù)雜模型動(dòng)力學(xué)分析的建模方法:采用Bush和RBE2的組合單元模擬鉚釘連接,將板間的弱非線性接觸力轉(zhuǎn)化為接觸剛度,建立該復(fù)合材料鉚接板的有限元模型。同時(shí),基于有限元-間接邊界元法推導(dǎo)了考慮接觸力的聲固耦合動(dòng)力學(xué)方程,開展了該復(fù)合材料鉚接板在隨機(jī)噪聲激勵(lì)下的聲固耦合分析,并探討界面接觸對(duì)聲固耦合系統(tǒng)固有特性和動(dòng)響應(yīng)的影響。研究結(jié)果表明,界面接觸模型比界面剛接模型更為準(zhǔn)確;剛接模型會(huì)增大復(fù)合材料鉚接板連接界面的局部剛度,使得結(jié)構(gòu)的固有頻率偏高,響應(yīng)峰值向高頻處移動(dòng);考慮接觸對(duì)結(jié)構(gòu)的加速度響應(yīng)影響較大,對(duì)應(yīng)力響應(yīng)影響較小。
[Abstract]:Aiming at the typical riveted plate of composite material under CVI process, a modeling method suitable for dynamic analysis of complex model is proposed. The rivet connection is simulated by the combined element of Bush and RBE2, and the weak nonlinear contact force between the plates is transformed into contact stiffness. The finite element model of the composite riveted plate is established, and the acousto-solid coupling dynamic equation considering the contact force is derived based on the finite element method and indirect boundary element method. The acousto-solid coupling analysis of the composite riveted plate under random noise excitation is carried out, and the influence of interface contact on the natural characteristics and dynamic response of the acousto-solid coupling system is discussed. The interface contact model is more accurate than the rigid interface model, and the rigid contact model increases the local stiffness of the interface of the composite riveted plate, which makes the natural frequency of the structure higher and the response peak moving to the high frequency. Considering the contact, the acceleration response of the structure is greatly affected, and the stress response is less affected.
【作者單位】： 東南大學(xué)工程力學(xué)系;江蘇省工程力學(xué)重點(diǎn)分析實(shí)驗(yàn)室;貴州風(fēng)雷航空軍械有限責(zé)任公司;
【基金】：國家自然科學(xué)基金(11572086&11402052) 教育部新世紀(jì)優(yōu)秀人才支持計(jì)劃(NCET-11-0086) 江蘇省自然科學(xué)基金(BK20140616) 江蘇省普通高校研究生科研創(chuàng)新計(jì)劃資助項(xiàng)目(CXZZ13_0084)
【分類號(hào)】：TB332
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本文編號(hào)：1627310