shell n. (pl. shells,2 義為 shell) 1.殼;介殼;甲殼;貝。 2.(昆蟲的)翅鞘;蛹的蛻皮。 3.【解剖學(xué)】種子的外皮;莢。 4.【地質(zhì)學(xué);地理學(xué)】地殼;薄硬巖層。 5.【解剖學(xué)】外耳。 6.【機(jī)械工程】(汽)鍋身。 7.【建筑】薄殼(屋頂);房屋的框架;內(nèi)部未竣工的建筑物。 8.船體;骨架。 9.子彈殼;炮彈;獵槍子彈;爆破筒。 10.(滑車等的)外框;內(nèi)棺。 11.外觀;外表;外形。 12.單人賽用艇。 13.〔英國〕(學(xué)校的)中級(jí)班〔四、五年級(jí)〕。 14.〔詩〕豎琴;七弦琴。 15.=shell jacket. 16.【物理學(xué)】(原子的)電子殼層。 17.(刀劍的)護(hù)手。 18.(像鉆進(jìn)殼中似的)沉默;冷淡。 19. 【計(jì)算機(jī)】操作系統(tǒng)外殼,命令解釋程序〔如DOS等〕。 the shell of an egg [a walnut] 蛋[胡桃]殼。 Beetles have shells. 甲蟲有硬殼。 an illuminating shell 照明彈。 a tear shell 催淚彈。 the shell of a pipe 管壁。 You're scarcely out of the shell yet. 你還乳臭未干。 cast the shell 脫殼;蛻皮。 come out of one's shell 不再羞怯沉默。 go [retire] into one's shell 緘默起來;害羞起來;對(duì)人持冷淡態(tài)度;保持距離。 in the shell 在萌芽[潛伏]時(shí)期。 vt. 1.由殼中剝出(豌豆等);〔美國〕剝(玉米);給…脫粒。 2.用殼體包被;用介殼鋪(路)。 3.轟擊;炮擊[轟]。 4.〔棒球俚〕(投手)使(對(duì)方)獲得多次安全打或得分。 shell oysters 去牡蠣殼。 vi. 1.脫殼;蛻殼;(金屬等)剝落;(果實(shí)等)脫落。 2.炮擊。 3.采集貝殼。 as easy as shelling peas 〔口語〕非常容易。 shell out 〔俚語〕交出;付出;付款,捐獻(xiàn) (S- out your money! 拿出錢來!)。
(2 ) aiming at the discrete structure of composite shells, this thesis proposes two integer coding method, then uses one of them to optimize composite shells (2)針對(duì)復(fù)合材料層合殼的離散型優(yōu)化特點(diǎn),提出兩種整數(shù)型編碼方式來表征層合殼結(jié)構(gòu)參數(shù)。
(2 ) aiming at the discrete structure of composite shells, this thesis proposes two integer coding method, then uses one of them to optimize composite shells (2)針對(duì)復(fù)合材料層合殼的離散型優(yōu)化特點(diǎn),提出兩種整數(shù)型編碼方式來表征層合殼結(jié)構(gòu)參數(shù)。
The weapon composites shell ( 534mm x 2450mm ) which has been produced out successfully can satisfy the above leakproof demands, which has instructive significance for the batch production of new type of torpedo in china 試制出的水中兵器用復(fù)合材料殼體(534mm2450mm),較好地滿足了耐6.0mpa外水壓,二年不滲漏、不失效的要求。
First, the finite element dynamic models of the cantilever intact and damaged laminated composite cylindrical shells are established . the piezoelectric smart materials bonded on the laminated composite shell are used as both actuator and sensor 首先,建立表面粘貼有壓電片材料的懸臂完好復(fù)合材料層合殼體及損傷復(fù)合材料層合殼體的有限元?jiǎng)恿W(xué)模型,并求出其動(dòng)力響應(yīng)。
The research work in this paper is mainly included following : ( 1 ) the method of aga-fem is developed . to optimize composite shells, this thesis proposes using aga-fem, and hierarchical design optimization method considering ply thicknesses and ply orientation angles respectively is presented 本文的研究主要包括:(1)發(fā)展了aga-fem方法并提出將其用于復(fù)合材料層合殼結(jié)構(gòu)的優(yōu)化設(shè)計(jì)分析,提出了分別考慮鋪層厚度和鋪層角度的兩級(jí)優(yōu)化策略。
The finite element methods of composite cables, composite laminated plates, composite beams, composite stiffened plates, composite sandwich plates, composite shells and textile composite structures are discussed . these theories lay a foundation for the finite element method of the analysis of the static and the dynamic properties of the composite space structures 并且一一討論了復(fù)合材料索、復(fù)合材料梁、復(fù)合材料板、復(fù)合材料加筋板、復(fù)合材料夾芯板、復(fù)合材料殼以及紡織結(jié)構(gòu)復(fù)合材料的有限元分析方法,為對(duì)復(fù)合材料大跨空間結(jié)構(gòu)體系進(jìn)行靜力和動(dòng)力的有限元分析方法奠定了理論基礎(chǔ)。
This paper firstly presents the impact basic theories and the applying method for the general engineering fem software system-ansys, then the preliminary numerical simulation has been conducted in the mechanical process of the laminated composite plates subjecting to the impacting loads, the higher-velocity hit between the composite shells and the metal structures, the bird-impact radar cover experiment is also included . changes of the mechanical values in subjecting to different impact loads are also analyzed 而后通過對(duì)復(fù)合材料結(jié)構(gòu)層合板遭受沖擊載荷作用、球殼與金屬板的高速撞擊,以及雷達(dá)罩鳥撞實(shí)驗(yàn)等力學(xué)過程進(jìn)行了初步數(shù)值模擬,分析了主要的力學(xué)參數(shù)量在承受不同沖擊變量時(shí)的變化,并為部分理論計(jì)算找出了相應(yīng)的實(shí)驗(yàn)依據(jù)。
Based on some a torpedo composite shell under hydrostatic pressure, the engineering design and experiment research for the stability of composite torpedo stiffened shells are carried out under high hydrostatic pressure in the paper . and the manufacture technology of special shaped stiffened thin wall shell is investigated systemically in practice and theory 本文以某型水雷復(fù)合材料耐外壓殼體的研制為背景,對(duì)內(nèi)置加筋異形結(jié)構(gòu)殼體的外壓穩(wěn)定性進(jìn)行了理論分析與實(shí)驗(yàn)研究,并對(duì)其成型制造技術(shù)進(jìn)行了系統(tǒng)的實(shí)驗(yàn)研究。
Furthermore, the prototype is experimented the hydrostatic test and provides the stress and strain results . the study on the structure design and manufacture technology of the stiffened composite shells used under high hydrostatic pressure has significance for the engineering design and manufacture of the analogy composite structure under hydrostatic 本課題對(duì)耐外壓復(fù)合材料異形加筋殼體的結(jié)構(gòu)設(shè)計(jì)和成型工藝技術(shù)開展的研究工作,對(duì)類似高外壓復(fù)合材料結(jié)構(gòu)的設(shè)計(jì)及制造具有一定的參考意義。
Composite laminate shells have been applied more and more widely in aerospace structures . in order to increase thrust to weight ratio and improve the comprehensive performance of airplane, optimization design must be carried out . this thesis brings forward utilizing the method of aga-fem, which combines adaptive genetic algorithm ( aga ) and finite element method ( fem ), to optimize fibre-reinforced composite shells 本文提出采用自適應(yīng)遺傳算法(adaptivegeneticalgorithm)和有限元方法(finiteelementmethod,fem)結(jié)合即aga-fem方法進(jìn)行纖維增強(qiáng)型復(fù)合材料層合殼結(jié)構(gòu)的優(yōu)化設(shè)計(jì),并對(duì)某航空發(fā)動(dòng)機(jī)復(fù)合材料機(jī)匣進(jìn)行優(yōu)化設(shè)計(jì)分析,取得了很好的效果。