彭劍 趙珧冰 王連華
摘要:基于時(shí)滯反饋控制策略及EulerBernoulli梁理論,建立了軸力作用下彈性支座壓電耦合梁的非線性動(dòng)力學(xué)模型.通過(guò)模態(tài)分析和線性穩(wěn)定性分析,得到了壓電耦合作用時(shí)滯反饋條件下的系統(tǒng)穩(wěn)定性條件.采用Galerkin方法和非線性振動(dòng)的多尺度法,從理論上推導(dǎo)出時(shí)滯動(dòng)力系統(tǒng)的分岔響應(yīng).結(jié)果表明,對(duì)于某一確定的時(shí)滯,控制增益的變化可能會(huì)導(dǎo)致周期運(yùn)動(dòng)、擬周期運(yùn)動(dòng)以及混沌運(yùn)動(dòng).
關(guān)鍵詞:軸力;EulerBernoulli梁;時(shí)滯反饋控制;穩(wěn)定性;分岔
中圖分類號(hào):O322 文獻(xiàn)標(biāo)識(shí)碼:A
研究者在航空航天、橋梁、建筑和防護(hù)工程等領(lǐng)域,廣泛研究了端部非剛性支承梁的非線性振動(dòng)與控制.通常而言,結(jié)構(gòu)的內(nèi)部阻尼很小,在受到外部干擾時(shí)易產(chǎn)生大幅振動(dòng),并持續(xù)較長(zhǎng)時(shí)間,從而影響結(jié)構(gòu)的正常工作,并可導(dǎo)致疲勞破壞,影響其使用壽命
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