stack n. 1.(麥桿等的)堆,垛;干草堆。 2.積材,層積,堆積;〔英國〕一堆〔木材等的計量單位,=108立方英尺〕。 3.〔常 pl.〕(圖書館的)許多書架,書庫 (= stack room)。 4.【無線電】選式存儲器。 5.槍架。 6.煙囪;一排[一群]煙囪,車船的煙突。 7.【機械工程】管組。 8. 〔英國〕(突出海面的)浪蝕巖柱,海中孤峰。 9.(賭博時的)一堆籌碼。 10.〔口語〕許多,大量。 a precariously balanced stack of books 眼看就要倒下來的一堆書。 a stack of postcards [old newspapers, shoeboxes] 一大堆明信片[舊報紙、鞋盒]。 a stack of rice straw 稻草垛。 a considerable stack of evidence 大量的證明材料。 have stacks of work to do 有許多工作要做。 stack of arms 槍架。 vt. 1.堆疊,堆垛,堆積,堆起。 2.【航空】指令飛機作分層盤旋飛行等待依次著陸。 3.【軍事】架(槍)。 4.秘密地預先安排好,內定。 5.〔美俚〕把房間弄得亂七八糟。 6.【橋牌】洗牌作弊。 S- arms! 【軍事】架槍! be nicely stacked up 體態豐滿勻稱的〔指婦女〕。 vi. 成堆,堆起來。 blow one's stack 〔俚語〕大發脾氣 (When he came in and saw the mess he blew his stack. 他一進屋里看見那個混亂情況就大發一頓脾氣)。 have the cards stacked against sb. 把某人的處境弄得極端不利。 stack the pins 〔美,運〕準備下一次比賽。 stack up 1. 總起來,加起來 (He is all abroad as to how things stack up today. 他對當前總的形勢毫無所知)。2.(飛機)分層盤旋飛行。3.與某人相稱[比較] (to); 與…較量[爭輸贏] (with, against) (She doesn't stack up to you. 她不如你)。4.牽強附會,表面似乎合理 (Your story just doesn't stack up. 你講的簡直是胡說八道)。 stack up the velvet 〔美,劇〕賺到錢,營業情況好。 n. -er 1.堆垛者。 2. 可升降攝像機臺。
sequence n. 1.繼續;接續;連續。 2.順序;程序;次第;關系;關聯。 3.后果;結果;接著發生的事;后事;后文。 4.【數學】數列;序列;數貫。 5.【無、計】指令序列;定序。 6.【計算機】順序機〔將信息項目排成順序的機器〕。 7.【音樂】用不同音調反復演奏一組樂句。 8.【天主教】宣講福音前唱的圣歌。 9.【牌戲】順。 10.【電影】(描述同一主題的)連續鏡頭;片斷,插曲;場景。 a logical sequence 條理;邏輯順序。 a causal [physical] sequence 因果關系。 the natural sequence to [for] folly 愚笨行為的必然結果。 in rapid sequence 一個接著一個;緊接著。 in regular sequence 挨次;按次序;逐一;有條不紊地。 in sequence 挨次;順次;逐一。 sequence of tenses 【語法】時態的配合[接續,呼應]。
( 2 ) a stacking sequence optimization ( sso ) method of composite laminates based on ga is suggested in lower level optimization of hdo ( 2 )提出了基于ga的復合材料層合板疊層順序優化設計( stackingsequeneeoptimization ,簡稱550 )方法,用于hno的底層優化設計。
The influences played by temperature rise , the degree of moisture concentration , fiber volume fraction , shell geometric parameter , total number of plies , stacking sequences and initial geometric imperfections are studied 討論了溫度和濕度,纖維體積比率,殼體幾何參數,鋪層數,鋪層方式和初始幾何缺陷等各種參數變化的影響。
The ultimate strength of cf / ep quasi - isotropic laminates with different stacking sequences is experimentally and numerically investigated to study the influence of stacking structure or loading direction on the strength 摘要以碳纖維環氧樹脂層合板為對象,研究了其最終強度與層合結構的關系,對于準各向同性層合板,其彈性性能不隨方向變化。
A three layered magneto - electro - elastic half - space subjected to vertical mechanical loads , charge or magnetomotive force is analyzed as the numerical example , and the calculative results of two different stacking sequences are compared 以在垂直機械載荷或電載荷或磁感應強度作用下三層半無限壓電壓磁彈性體為算例,并比較了兩種不同材料疊放順序的計算結果。
Though this approach is reasonable and robust for that specific design , however , it is time consuming , costly and needs to be repeated for designs when structural component has different stacking sequences or subject to different fatigue loading 層壓板的疲勞損傷包括纖維斷裂、基體破壞和分層等破壞形式,這些形式的破壞可能同時發生,相互影響,表現出十分復雜的疲勞損傷機理。
In this paper , the residual strength of damaged composite laminates and their repaired structures under unidirectional tensile stress is calculated . the influence of the repair parameters , such as the diameter of the circle patch , the length and the width of the rectangle patch , the thickness of the patch , the stacking sequence is discussed 本文對含損傷復合材料層壓板及其修補結構在單向拉伸載荷作用下的剩余強度進行了計算,同時對補片參數對修補效果的影響做了一些研究和探討,主要做了以下幾個方面的工作: 1
The residual strength of damaged composite laminates and their repaired structures are calculated , and the influence of the repair parameters is discussed by the finite element and program stated above . some useful conclusion can be drawn according to the curves , which show the influence of repair parameters to repair effect . for the laminate which contains a circle hole , the suggested patch shape is circle , the patch size is 2 to 3 times than the diameter of damaged hole , the patch thickness is equal to the parent laminate and the patch stacking sequence is the same as the parent laminate 用所建立的二維有限元模型和編寫的有限元程序計算損傷板及其修補結構的剩余強度,并分析了修補參數對修補效果的影響;根據本文計算得到的修補參數對修補效果的影響曲線,可以得到如下結論: ?對于含孔復合材料層壓板,當圓形補片與母板鋪排順序相同、直徑為損傷孔直徑2 3倍、相對厚度為100時能夠獲得比較好的修補效果。
Simply supported and multilayered electro - elastic plates : using the theories of simply supported and multilayered magneto - electro - elastic plates , without considering the magneto effect , we can easily get the general solution formulation of simply supported and multilayered electro - elastic plates . four - layered electro - elastic plates with two stacking sequences under a mechanical load or charge are analyzed 對于簡支壓電彈性層合板問題,根據簡支壓電壓磁彈性層合板問題的理論推導,不考慮其磁耦合效應,令相關系數為零,即可得到多層壓電彈性層合板狀態變量的表達式。
In upper level optimization , the thickness and geometry factors of composite skins and webs as well as other structural dimensions are taken as design variables . then , considering the behavior constraints and the side constraints , the structural mass is minimized by the mathematical programming technique . in lower level optimization , the mathematical programming technique or the genetic algorithm ( ga ) is used to search the practical stacking sequence of composite skins and webs to realize the given thickness and geometry factors from upper level optimization 底層優化設西北工業大學博士學位論文計以復合材料蒙皮和腹板等層合板各分層的厚度(或鋪層數) 、鋪層角和鋪層順序為設計變量,以層合板的幾何因子與頂層優化設計給出的最優幾何因子之間的誤差最小為目標,考慮層合板厚度和制造工藝性約束,采用數學規劃方法或遺傳算法( geneticalgorithm ,簡稱ga )求出底層最優設計變量。
In this research , fatigue life of laminate composite is predicted phenomenologically , dealing mainly with in - plane stresses without accounting for out - of - plane failures such as delamination . fatigue modulus is used as a physical parameter which helps to describe the basic fatigue behaviour of unidirectional laminates and obtain expressions for cumulative damages defined by strains . based on some typical fatigue test data for unidirectional composite laminates , a cumulative fatigue damage model is presented for predicting the fatigue life of multidirectional laminates with arbitrary stacking sequence under complicated fatigue loadings 本文以碳纖維/樹脂基t300 / qy8911層壓結構為研究對象,從唯象的觀點出發,以疲勞模量為參量構造損傷函數,基于幾組最典型的單向板疲勞試驗數據,建立單向板在多軸循環應力作用下的疲勞壽命模型,并以此為基礎,發展同種材料體系的任意鋪層形式的多向層壓板在復雜循環載荷作用下的疲勞壽命預測方法。