stress n. 1.壓力,壓迫,緊迫,緊張。 2.【語音】重音;重讀;【詩】揚音;語勢,著重點。 3.重要(性),重點,強調(diào)。 4.【物理學】應(yīng)力;脅強,重力。 The landlord has imposed a severe stress on the poor tenants. 房東給貧苦的房客們加了很大的壓力。 We must lay stress on self reliance. 我們必須強調(diào)自立更生。 Give stress to the 2nd syllable. 重讀第二音節(jié)。 stress diagram 【工業(yè)】應(yīng)力圖。 moisture stress 缺水。 tensile stress 【材】抗張應(yīng)力。 be stressed out (因心理壓力過重而)精疲力盡的。 driven by stress of=under stress of. in times of stress 在緊張[繁忙,困難]的時候。 lay [place, put] stress on 強調(diào),用力干,著重于。 under stress of 被…逼迫著,在…強制下,由于,因為。 vt. 1.著重,強調(diào),加重語氣說。 2.用重音讀。 3.加壓力[應(yīng)力]于,壓,壓迫。 adj. -ful ,-less adj.
Based on the okata theory of stress triggering , we make a systemic analysis on the triggering each other of strong earthquakes and group activities of earthquake 應(yīng)用okata的應(yīng)力觸發(fā)理論,對川滇地區(qū)強震相互觸發(fā)、地震成組活動進行較系統(tǒng)的分析研究。
This paper introduces the basic theory of stress inspection using ultrasonic at first . the mechanism of the generation of lcr wave is described in detail as well as its application 本文首先介紹了超聲波應(yīng)力檢測的基本理論,重點介紹了lcr波的產(chǎn)生機理及其在應(yīng)力檢測中的應(yīng)用。
With the material dynamic constitutive equation including damage and the effect of stain rate the predictable formula about ballistic limit velocity of fiber composite target . secondly based on the damage feature about ceramic / fiber composite target caused by impact load , analysis model about defense performance of ceramic / composite material target is formed and the predictable formula about ballistic limit velocity is also given . lastly using the reflection and projectile theory of stress wave the paper discusses the design of ceramic / composite material target , optimizes the design of double layer ceramic / composite targets , gains optimal coefficient under certain area density and discusses the variety relationship of area density and thickness with optimal coefficient u nder some ballistic limit velocity 3 首先,分析了纖維類正交鋪層復合靶板在沖擊載荷作用下的損傷破壞機理,結(jié)合包含損傷和應(yīng)變率效應(yīng)的材料動態(tài)本構(gòu)方程,建立了纖維復合材料板彈道極限速度的預(yù)測公式;其次,根據(jù)陶瓷/纖維材料復合靶板在沖擊載荷下的破壞特點,建立了陶瓷/復合材料靶板抗彈性能分析模型,給出了彈道極限速度預(yù)測公式;最后,利用應(yīng)力波反射和透射理論討論了陶瓷/復合材料靶板的設(shè)計問題,對雙層陶瓷復合靶板的優(yōu)化設(shè)計進行了分析,給出了在一定面密度下的最佳優(yōu)化系數(shù),討論了一定彈道極限速度下的面密度和厚度隨優(yōu)化系數(shù)的變化關(guān)系。
Perfect pre - processing and post - processing function is one of the main factors to evaluate the vitality and market value of the finite element analysis system surveying today development of finite element analysis technology , most of which concentrate on establishing fine user interface , also has some limitation on application , and especially , the research on the visualization of arbitrary cut - plane is always in ascendants to realize the visual processing on cut - plane needs reprocessing the results of finite element analysis which have get , so the algorithm is two parts : seeking the physical value of cut - plane and drawing 2d contours , , the former , based on the theory of stress on " arbitrary inclined plane " in physical mechanics , use the method of linear interpolation method to get the coordination and physical value of intersection between cut - plane and element arris ; the latter , based on the tables on elements , nodes , stress and strain , summarize a rapid algorithm of generating 2d contours based on the grid . this thesis synthesizes there two parts and get a visual processing program under fortran 縱觀有限元分析技術(shù)的發(fā)展,目前大多集中在建立良好的用戶界面上的研究仍存在許多應(yīng)用上的局限性,其中對任意剖面上可視化的研究仍處于方興未艾的階段。要實現(xiàn)任意剖面上可視化處理,必須先將得到的有限元計算結(jié)果進行再處理,因此在算法上分為兩部分:求任意剖面上物理量值的算法及二維等值線算法。前一部分以彈性力學中“任意斜截面的應(yīng)力”為理論基礎(chǔ),利用線性插值方法得到截面與單元棱邊的交點坐標及交點物理量值;在此基礎(chǔ)上;根據(jù)已得到的單元及節(jié)點序號表、應(yīng)力應(yīng)變物理量表,總結(jié)出一種基于有限元剖分網(wǎng)格的快速生成二維等值線的算法。