tree attachment中文什么意思

tree: n. 1.樹〔主要指喬木，也可指較大的灌木〕。 ★玫瑰可 ...
attachment: n. 1.附著，附著物；附屬物，附件。 2.愛慕，依戀； ...
at attachment: 附屬裝制; 集成設(shè)備電路
attachment: n. 1.附著，附著物；附屬物，附件。 2.愛慕，依戀；依附 (for; to)。 3.【法律】逮捕；扣押(人，財(cái)產(chǎn))。 4.扣押證。 attachments to a sewing machine 縫紉機(jī)的附件。 form a profound attachment for sb. 對(duì)某人大為傾倒。
by attachment: 按附件

下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯

Different vibration characteristics between the two models are discussed . geometry mismatch in a turbine blade root , which arose in manufacturing process or caused by wearing out during service , leads to contact conditions changed in fir - tree attachments
汽輪機(jī)葉根制造尺寸誤差或運(yùn)行磨損造成的尺寸改變會(huì)導(dǎo)致葉根與輪盤接觸狀態(tài)變化,進(jìn)而引起葉片固有頻率發(fā)生漂移,并有可能接近共振頻率而導(dǎo)致葉片事故。
As a result , shifting of the fundamental frequencies and redistribution of stress in the blade base possibly cause failure of the blade . a three - dimensional finite element model of a blade and its fir - tree attachments have been constructed and analyzed with taking into account of contact nonlinearity in the attachments and large deformation effect of the blade . the geometry mismatch was introduced into the finite element model by defining gaps between two contact surfaces in the attachments
分析結(jié)果表明葉根誤差發(fā)生的位置對(duì)葉片彎曲振型的固有頻率影響較大,對(duì)扭轉(zhuǎn)振型影響較小;誤差的大小對(duì)葉片各階固有頻率影響均較小,但對(duì)葉根應(yīng)力分布有影響;比較發(fā)現(xiàn),在計(jì)算固有頻率時(shí),將葉片在葉根處簡(jiǎn)單地處理成固支位移邊界是不合理的。

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