本文選題：損傷識(shí)別 + 海洋平臺(tái)�。� 參考：《工程力學(xué)》2017年02期

【摘要】：結(jié)構(gòu)損傷引起的損傷特征參數(shù)的變化往往被環(huán)境因素(溫度、質(zhì)量)變化引起的損傷特征參數(shù)的變化所掩蓋,從而導(dǎo)致基于振動(dòng)的損傷識(shí)別方法失效。該文利用時(shí)間序列中的AR模型系數(shù)和計(jì)量經(jīng)濟(jì)學(xué)中的協(xié)整進(jìn)行環(huán)境因素(溫度、質(zhì)量)影響下的海洋平臺(tái)結(jié)構(gòu)損傷識(shí)別研究。首先利用AR模型對(duì)實(shí)測(cè)的加速度響應(yīng)信號(hào)進(jìn)行擬合,選擇第一階AR系數(shù)為協(xié)整變量,然后對(duì)不同節(jié)點(diǎn)的協(xié)整變量進(jìn)行協(xié)整,將協(xié)整殘差作為損傷指標(biāo),最后通過(guò)X-bar控制圖進(jìn)行結(jié)構(gòu)的損傷識(shí)別。海洋平臺(tái)結(jié)構(gòu)的數(shù)值模擬和振動(dòng)臺(tái)模型試驗(yàn)結(jié)果驗(yàn)證了該方法的有效性。
[Abstract]:The variation of damage characteristic parameters caused by structural damage is often concealed by the changes of damage characteristic parameters caused by environmental factors (temperature and mass), which leads to the failure of vibro-based damage identification methods. In this paper, the AR model coefficients in time series and cointegration in econometrics are used to study the damage identification of offshore platform structures under the influence of environmental factors (temperature and mass). First, the AR model is used to fit the measured acceleration response signal, and the first order AR coefficient is chosen as the cointegration variable. Then the cointegration variables of different nodes are cointegrated, and the cointegration residuals are taken as the damage index. Finally, the damage identification of the structure is carried out by X-bar control chart. The effectiveness of the method is verified by numerical simulation of offshore platform structure and shaking table model test.
【作者單位】： 青島理工大學(xué)土木工程學(xué)院;山東省藍(lán)色經(jīng)濟(jì)區(qū)工程建設(shè)與安全協(xié)同創(chuàng)新中心;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51179082) 山東省藍(lán)色經(jīng)濟(jì)區(qū)工程建設(shè)與安全協(xié)同創(chuàng)新中心項(xiàng)目
【分類(lèi)號(hào)】：TU317
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本文編號(hào)：1820965