本文選題：周向拉桿轉(zhuǎn)子　切入點(diǎn)：等效剛度　出處：《工程設(shè)計(jì)學(xué)報(bào)》2017年05期 　論文類型：期刊論文

【摘要】：周向拉桿轉(zhuǎn)子作為燃?xì)廨啓C(jī)等重大裝備的核心部件,疲勞損傷是導(dǎo)致其失效和性能退化的主要原因之一。目前對(duì)疲勞損傷的研究均是針對(duì)單個(gè)元件,而僅從單個(gè)元件的損傷依然無法預(yù)測(cè)整個(gè)周向拉桿轉(zhuǎn)子的損傷。以某型燃?xì)廨啓C(jī)周向拉桿轉(zhuǎn)子為研究對(duì)象,考慮周向拉桿轉(zhuǎn)子燃燒室損傷和透平端拉桿損傷對(duì)周向拉桿轉(zhuǎn)子整體損傷的影響,建立了周向拉桿轉(zhuǎn)子整體疲勞損傷模型。通過對(duì)周向拉桿轉(zhuǎn)子輪盤間接觸效應(yīng)的等效,建立了考慮虛擬材料層的周向拉桿轉(zhuǎn)子動(dòng)力學(xué)模型,得到了周向拉桿轉(zhuǎn)子各組成部分剛度及其整體等效剛度;運(yùn)用損傷力學(xué)及有限元分析,提出了周向拉桿轉(zhuǎn)子整體疲勞損傷建模方法,得出周向拉桿轉(zhuǎn)子的整體疲勞損傷及元件損傷與致裂壽命的關(guān)系。結(jié)果表明:所建立的損傷模型將周向拉桿轉(zhuǎn)子整體損傷和致裂壽命視作一個(gè)復(fù)雜、非線性的過程,考慮了多元件損傷的影響,可清楚反映多元件損傷與整體損傷的非線性關(guān)系。研究結(jié)論為周向拉桿轉(zhuǎn)子結(jié)構(gòu)設(shè)計(jì)和壽命預(yù)測(cè)等提供了理論參考。
[Abstract]:As the core component of gas turbine and other important equipment, fatigue damage is one of the main causes of failure and performance degradation. However, it is still impossible to predict the damage of the whole circumferential pull rod rotor only from the damage of a single element. The circumferential pull rod rotor of a gas turbine is taken as the research object. Considering the effects of the damage of the circumferential pull rod rotor combustion chamber and the turbine end pull rod damage on the overall damage of the circumferential pull rod rotor, a global fatigue damage model of the circumferential pull rod rotor is established. The equivalent contact effect between the wheel and disk of the circumferential pull rod rotor is obtained. The dynamic model of circumferential tension rod rotor considering virtual material layer is established, and the stiffness of each component and its integral equivalent stiffness are obtained, and the damage mechanics and finite element analysis are used. A method of global fatigue damage modeling for rotor with circumferential pull rod is presented. The global fatigue damage and the relationship between component damage and crack life of the rotor with circumferential pull rod are obtained. The results show that the damage model regards the whole damage and crack life of the rotor with circumferential pull rod as a complex and nonlinear process. Considering the influence of multi-element damage, the nonlinear relationship between multi-element damage and global damage can be clearly reflected. The conclusion provides a theoretical reference for the design of circumferential rod rotor structure and life prediction.
【作者單位】： 中南大學(xué)高性能復(fù)雜制造國家重點(diǎn)實(shí)驗(yàn)室;中南大學(xué)機(jī)電工程學(xué)院;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)資助項(xiàng)目(2013CB035706) 中南大學(xué)研究生創(chuàng)新項(xiàng)目(2016zzts312)
【分類號(hào)】：TH114

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