sequence n. 1.繼續(xù);接續(xù);連續(xù)。 2.順序;程序;次第;關(guān)系;關(guān)聯(lián)。 3.后果;結(jié)果;接著發(fā)生的事;后事;后文。 4.【數(shù)學(xué)】數(shù)列;序列;數(shù)貫。 5.【無(wú)、計(jì)】指令序列;定序。 6.【計(jì)算機(jī)】順序機(jī)〔將信息項(xiàng)目排成順序的機(jī)器〕。 7.【音樂(lè)】用不同音調(diào)反復(fù)演奏一組樂(lè)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(xù)鏡頭;片斷,插曲;場(chǎng)景。 a logical sequence 條理;邏輯順序。 a causal [physical] sequence 因果關(guān)系。 the natural sequence to [for] folly 愚笨行為的必然結(jié)果。 in rapid sequence 一個(gè)接著一個(gè);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(yǔ)法】時(shí)態(tài)的配合[接續(xù),呼應(yīng)]。
( 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(fù)合材料層合板疊層順序優(yōu)化設(shè)計(jì)( stackingsequeneeoptimization ,簡(jiǎn)稱550 )方法,用于hno的底層優(yōu)化設(shè)計(jì)。
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(shù),鋪層數(shù),鋪層方式和初始幾何缺陷等各種參數(shù)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(huán)氧樹脂層合板為對(duì)象,研究了其最終強(qiáng)度與層合結(jié)構(gòu)的關(guān)系,對(duì)于準(zhǔn)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(jī)械載荷或電載荷或磁感應(yīng)強(qiáng)度作用下三層半無(wú)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(jì)算結(jié)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(shí)發(fā)生,相互影響,表現(xiàn)出十分復(fù)雜的疲勞損傷機(jī)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(duì)含損傷復(fù)合材料層壓板及其修補(bǔ)結(jié)構(gòu)在單向拉伸載荷作用下的剩余強(qiáng)度進(jìn)行了計(jì)算,同時(shí)對(duì)補(bǔ)片參數(shù)對(duì)修補(bǔ)效果的影響做了一些研究和探討,主要做了以下幾個(gè)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(jì)算損傷板及其修補(bǔ)結(jié)構(gòu)的剩余強(qiáng)度,并分析了修補(bǔ)參數(shù)對(duì)修補(bǔ)效果的影響;根據(jù)本文計(jì)算得到的修補(bǔ)參數(shù)對(duì)修補(bǔ)效果的影響曲線,可以得到如下結(jié)論: ?對(duì)于含孔復(fù)合材料層壓板,當(dāng)圓形補(bǔ)片與母板鋪排順序相同、直徑為損傷孔直徑2 3倍、相對(duì)厚度為100時(shí)能夠獲得比較好的修補(bǔ)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(duì)于簡(jiǎn)支壓電彈性層合板問(wèn)題,根據(jù)簡(jiǎn)支壓電壓磁彈性層合板問(wèn)題的理論推導(dǎo),不考慮其磁耦合效應(yīng),令相關(guān)系數(shù)為零,即可得到多層壓電彈性層合板狀態(tài)變量的表達(dá)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(yōu)化設(shè)西北工業(yè)大學(xué)博士學(xué)位論文計(jì)以復(fù)合材料蒙皮和腹板等層合板各分層的厚度(或鋪層數(shù)) 、鋪層角和鋪層順序?yàn)樵O(shè)計(jì)變量,以層合板的幾何因子與頂層優(yōu)化設(shè)計(jì)給出的最優(yōu)幾何因子之間的誤差最小為目標(biāo),考慮層合板厚度和制造工藝性約束,采用數(shù)學(xué)規(guī)劃方法或遺傳算法( geneticalgorithm ,簡(jiǎn)稱ga )求出底層最優(yōu)設(shè)計(jì)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(jié)構(gòu)為研究對(duì)象,從唯象的觀點(diǎn)出發(fā),以疲勞模量為參量構(gòu)造損傷函數(shù),基于幾組最典型的單向板疲勞試驗(yàn)數(shù)據(jù),建立單向板在多軸循環(huán)應(yīng)力作用下的疲勞壽命模型,并以此為基礎(chǔ),發(fā)展同種材料體系的任意鋪層形式的多向?qū)訅喊逶趶?fù)雜循環(huán)載荷作用下的疲勞壽命預(yù)測(cè)方法。