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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，財產)。 4.扣押證。 attachments to a sewing machine 縫紉機的附件。 form a profound attachment for sb. 對某人大為傾倒。
by attachment: 按附件

下載手機詞典可隨時隨地查詞查翻譯

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
汽輪機葉根制造尺寸誤差或運行磨損造成的尺寸改變會導致葉根與輪盤接觸狀態變化,進而引起葉片固有頻率發生漂移,并有可能接近共振頻率而導致葉片事故。
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
分析結果表明葉根誤差發生的位置對葉片彎曲振型的固有頻率影響較大,對扭轉振型影響較小;誤差的大小對葉片各階固有頻率影響均較小,但對葉根應力分布有影響;比較發現,在計算固有頻率時,將葉片在葉根處簡單地處理成固支位移邊界是不合理的。