極限最大應力 的英文怎麼說
中文拼音 [jíxiànzuìdàyīnglì]
極限最大應力
英文
limiting maximum stress- 極 : i 名詞1 (頂點; 盡頭) the utmost point; extreme 2 (地球的南北兩端; 磁體的兩端; 電源或電器上電流...
- 限 : Ⅰ名詞(指定的范圍; 限度) limit; bounds Ⅱ動詞(指定范圍, 不許超過) set a limit; limit; restrict
- 最 : 副詞(表示某種屬性超過所有同類的人或事物) most; best; worst; first; very; least; above all; -est
- 應 : 應動詞1 (回答) answer; respond to; echo 2 (滿足要求) comply with; grant 3 (順應; 適應) suit...
- 力 : Ⅰ名1 (力量; 能力) power; strength; ability; capacity 2 [物理學] (改變物體運動狀態的作用) forc...
- 極限 : 1 (最高的限度) the limit; the maximum; the ultimate limit; limitation; extremity; tipping point...
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Establishing an human spine dynamic model is an significan event to study spine injured biomechanics of pilot " s ejective injury, parachute opening, landing and study the endurance to impact loading on human spine. in this paper, the huston " s method of kane " s equations is developed so that it can be applied to the multibodysystem including translation between the bodyies. the dynamic model of human spine is provided basing on these theories, while the big movement of spine is considered. the deformation of vetebra is far smaller comparing with the intervetebra disc, so the spine is considered into multibodysystem including rigid bodies ( vetebra ) and the flexible bodies ( intervetebra disc ). the computer solution correspond with the results of the large scale human impact test. the rigid coefficient factors and the damping factor of intervetebra joints are obtained
人體脊柱動力學模型的建立對研究飛行員彈射救生、傘兵跳傘開傘、著陸等脊柱損傷的生物力學以及研究人體脊柱耐受沖擊載荷的極限問題都具有重要意義.首先發展了凱恩方程的休斯頓方法,使其可應用於變形體連接的多體系統,並以此理論為依據建立人體整椎脊柱沖擊動力學模型,此時考慮脊柱的大位移運動,每個椎骨的變形相對椎間盤的變形小得多,把脊柱看成由剛體(椎骨)和變形體(椎間盤)組成的多體系統.並以大型真人坐姿沖擊實驗結果進行了擬合,最後得到腰椎間關節剛度系數因子和阻尼系數因子The consequence is, when the majority of structure does n ' t enter yield habitus, but the position of belly - board has been reached the ultimate habitus, it lead to material waste of the other positions, we should pay attention to the disastrous result it will bright to us
它帶來的後果就是當結構的大部分處于彈性狀態時,箱梁腹板處由於剪力滯效應一般最先達到強度極限狀態,導致腹板間材料的抗力沒有得到充分的使用,如不引起重視會帶來災難性後果。Linear induction motor is an important kind of machines which have some merits such as simple structure, low cost, durability, convenience for maintenance etc. the subject of this thesis is to study a big circular ring linear induction motor, and the major works in this thesis are summarized as follows : ( 1 ) considering the effects of the finite length of primary core, one - dimension analytical solution for the air gap field is cited in this paper. based on it, the single layer winding magnetic field is studied. considering whole - pitched and short - pitched winding configuration with odd poles and half - fulled slots in both ends, the double - layer winding magnetic field is analyzed, respectively
本文對大圓環直線感應電機進行了深入細致研究,內容包括: ( 1 )本文採用有限長行波面電流作用於有限長鐵芯上的模型,引用了氣隙磁場一維解,研究了單層繞組磁場,奇數極半填槽雙層繞組在採用整距和短距時磁場的分析、比較,簡單介紹了二維解; ( 2 )用有限元軟體ansoft對大圓環直線感應電機空載氣隙磁場進行了靜態分析,並分析了結果; ( 3 )用軟體進行了額定電壓下的瞬態分析,得到了轉矩,位移,轉速隨時間變化曲線圖,利用單極性霍爾元件測定轉速並與軟體計算結果進行了比較,採用等效電路法計算了堵轉時的最大電磁力並做實驗進行了驗證,由實驗測得了三相電流波形,並與計算結果進行了比較,對其不對稱性進行了定性分析。With experiments and theoretical analyzing, we find when the heat discharge is smaller than the entrainment limited, what influences the ability of heat - transmitting of work quality is the quantity of injection and dry limit fluid inventory, the optimum quantity of injection of the three working fluid is 8 ~ 14g ; and the delivering factor that transmission coefficient is determined by capillary limit, not the heat transmission ability of the thermal syphon. therefore, among the three working fluid, acetone is the best. low wind - speed has the obvious function in heat transmission of the thermal syphon
本文通過實驗研究和理論分析,認為在熱流量小於攜帶極限時,影響工質傳熱能力的是cpu重力熱管的充液量和其乾涸極限,此次所實驗的三種工質,最佳充液量應當在8g ~ 14g ;傳輸因素主要決定普通熱管的毛細極限,而不是重力熱管傳熱能力的決定因素;三種工質中的最佳工質是丙酮;小風速時風速的變化對cpu重力熱管的傳熱有明顯的作用,但在風速大於1m / s以後,風速增加對于cpu重力熱管的傳熱能力的增加效果減緩。City construction is identical with applying load on soil mass, so researching maximal area coverage and locus of stress diffusion, transfer and concentration in soil will be helpful of analyzing the deformation and stabilization of city foundation. it also is important content in the research of ultimate bearing resistance of city geologic environment, and it will provide beneficial reference for city disaster reduction, prevention and city sustainable development
城市建設等同於在城市下伏土體上不斷施加荷載,土中應力分佈、傳遞、集聚的最大區域、部位的研究,將有助於分析城市地基變形與穩定問題,是城市地質環境極限承載力研究中的重要內容,可為城市減災、防災,城市可持續發展提供有利的依據。Abstract : based on the analysis of pipe ramming procedure, thi s paper presented the method calculating the ramming resistance force according to the results of strata pressure and dynamic probing, and the method calculating displacement, li mit length of rammed pipe and max. pressure inside pipe according to wave dynami cs
文摘:分析了夯管錘夯入鋼管的過程,提出了依據地層壓力和動力觸探結果計算夯入鋼管阻力的方法;還提出了應用波動力學計算夯入鋼管位移、極限鋼管夯入長度及鋼管內最大壓應力的方法。The conclusion of reappearing analysis is that crane bridge be used as usual because main weld maximum stress of upper cover plate of main beam lower than yield limit though it higher than permissible stress. inner stress of secondary beam was over ultimate strength, and deforming is ultra big. so it was unfit for produce and secondary beam must be changed
再現分析得出的主要結論為:橋架的主樑上蓋板主焊縫的最大應力超過了許用應力,但小於屈服極限,可以繼續投入使用;副梁內部的應力遠遠超過了強度極限,變形特別嚴重,不能滿足生產要求,因此更換新的副梁;端梁內部的應力超過了屈服極限,小於強度極限,在應力較大的位置焊接補強板;投入使用后,要對整個橋架進行定期檢查。The static triaxial test of two engineerings shows that the breaking strength of asphalt concrete declines significantly as the temperature rises and the strain increases noticeably when breaking. increase in the asphalt content leads to decrease in tangent modulus and cohesion, but the internal friction angle tends to increase. increasing confining stress results in the augment of the maximum stress and the ultimate value of volumetric strain
兩個實際工程的靜三軸變形與強度試驗表明,隨著溫度升高瀝青混凝土破壞強度明顯降低,破壞時應變明顯加大;瀝青含量的增加會導致切線模量和凝聚力降低,但內摩擦角趨于增加;周圍壓力增大會導致最大應力_ d增大,其體變壓縮極限值也越大。The result of macro - quality experiments show : mineral admixtures markedly slow the hydrating velocity of cement slurry, decrease and delay the hydrating max - temperature, in which steel slag is more effective ; expansive agents compensate concrete shrinkage, enhance the concrete dense degree, strengthen the interfacial layer between fiber and cement matrix and improve the physical mechanics qualities of acic ; minimal admixtures markedly improve the concrete workability property, increase the concrete later intensity & density and the capability of anti - chemical attack and anti - permeability ; hybrid fiber reinforces the toughness of obviously acic by the means of anti - cracking effect of fiber with different sizes and different properties in the corresponding construction levels
實驗結果顯示:鋼渣摻合料能顯著減緩水泥漿體水化速率,降低砂漿的水化溫升並延遲最高溫升時間;補償混凝土收縮,提高混凝土密實度,加強纖維與水泥石的界面粘結,增強混凝土力學性能,但不能明顯改善混凝土韌性。混雜纖維通過纖維的不同尺度與不同性質在相應的結構層次上產生阻裂效應,增韌鋼渣防滲抗裂混凝土;增加混凝土的破壞極限能,極大提高混凝土抗彎曲能力和韌性指數,改善混凝土脆性。The buckling of a plate mostly occurs in elastic regime with high strength steel adopted widely, and the plate reaches ultimate strength due to losing capacity when equivalent stress where maximal in - plane compressive stress appears arrives at yield in post - buckling phase
隨著高強度鋼的廣泛應用,板格屈曲大部分發生在彈性范圍內,在後屈曲階段當板格最大面內壓縮應力處的等效應力達到屈服極限時,板格迅速卸載,此時板格達到極限強度。Author thinks that the direction of the maximum plastic distortion along a constant radius around the crack tip may be considered as the direction of shear - mode fracture ( named pmax - criterion ) and the load when located shear band prongs the ligament in the front of crack tip is regarded as the limited load of shear - mode fracture. ( 3 ) the fad ( fracture assessment diagram ) of titled crack is proposed based on achievements of mesomechanics about i - ii complex ductile fracture of metal, and the titled crack is classified two kinds : void - mode fracture is assessed by fracture assessment curve, and shear - mode fracture by limited load. ( 4 ) using a fe program based on plantle - ressue theory to calculate some mesomechanical parameters, a flange joint structure of a high pressure vessel ( design pressure 31. 4mpa and the thickness of the hemispherical head is half of that of shell. ) is analyzed to determine whether the structure under operation pressure is safe or not, forecast the mode of potential invalidation and argue for the rationality of design of the structure
試件的整體斷裂為剪切型,但在試件芯部裂尖鈍化區中部出現了韌窩型啟裂並有一定的擴展,說明局部較高的應力三軸度也會使韌窩型機制得以發展,但是不改變試件整體的剪切型斷裂模式;對韌性斷裂的剪切模式的細觀機理做了一定的探討,並且提出了含裂紋構件剪切型斷裂的宏觀判據:認為裂紋前方的集中剪切帶中與裂紋尖端等半徑處最大有效塑性應變出現的方向可以作為裂紋剪切斷裂的方向(可簡稱為_ ( pmax )準則) ,集中剪切滑移帶貫穿裂紋前方承載韌帶時的載荷可以作為極限載荷;本文運用金屬韌性斷裂細觀力學在一復合型韌性斷裂方面的研究成果,採用失效評定圖的形式,提出了傾斜裂紋的安全性評定方法的基本框架。At first, the mechanical model of joint is discussed, and the constitutive relation of the rough joint, especially the bolt - supported joint, is given. then bedding slide of bedding stratified rock slope is studied adopting limit equilibrium method, and a formula of stability is brought forward. at last, the bedding stratified rock slope ' s buckling deformation and failure mechanism and its evaluating method of stability is investigated, a corresponding mechanics model is established, then detail research to this failure mode is made in theory combining the energy law and elastic stability theory of plate and beam, and an analytical solution of the yielding curve is educed from this model
文中首先對結構面的力學模型進行了一定的探討,提出了粗糙結構面尤其是加錨結構面的本構關系;然後採用極限平衡法,研究了順向層狀巖質邊坡的順層滑動失穩,提出了其穩定性計算公式;最後,結合能量定律和彈性板梁穩定理論,探討了工程中常見的順向層狀巖體邊坡潰屈失穩時的破壞機理、變形規律和穩定性定量評價方法,建立了相應的力學模型,求出了其相應的解析解,並提出了臨界坡長與最大彎曲位置的確定方法。This paper overviewed the prediction methods of forming limit in sheet metal forming, which included forming limit stress diagram, the maximum forming thinning ratio, forming limit diagram and ductile fracture criteria ( dfc )
摘要對板料成形中的成形極限應力圖、最大變薄率、成形極限圖以及韌性斷裂準則等預測成形極限的方法,進行了綜述和分析。The effect of different sizes of sections, modes and values of residual stresses are studied. through the analysis, the conclusion is arrived at that the universal slenderness ratio should be used to better correlate the stability of box section beams with the member length instead of the out - of - plane slenderness, and the stability coefficient is taken to be 1. 0 for practical used box girder. then, the elastic critical loads of box section beam - columns are obtained based on the gjelsvik theory, and the relationship between axis force p and moment m is given
最後,運用ansys通用有限元程序的beam189單元,引入初彎曲和殘余應力的影響,用考慮幾何和材料雙重非線性的有限元求解格式求得箱形柱在不同軸力和彎矩比例作用下的彈塑性極限承載力,通過對十幾個不同截面尺寸構件在不同長細比下的承載力計算,發現在軸力p遠大於彎矩m時,構件將是平面外失穩控制,而當軸力p遠小於彎矩m時,構件則以平面內失穩為主。The rule of settlement and pore stress is educed too. then it is compared with the case which is found in site. finally, the paper studies the computing method of pile to soil stress ratio of rigid pile composite foundation with cuhion, and these conditions are thought that the top of pile pierce into cushion and the bottom of pile pierce into underlayer. lt is assumed that the cushion is ideal elastic mass and ideal elastic - plastic mass, then the formula is developed and all parameters " effects to stress ratio of pile to soil are discussed
最後,推導出了帶墊層的剛性樁復合地基樁土應力比的計算公式,這個公式將墊層分為彈性體和理想彈塑性體兩種情況分別進行推導,考慮剛性樁刺入墊層和下臥層的情況,並對公式進行了分析,得出了在剛性樁復合地基中樁土應力比隨著墊層模量和樁模量的增大而增大,但都有一極限值,隨樁間土模量的增大而減小,也有一極限值。Therefore, this design makes material sufficiently used, the weight of road wheel effectively lightened. at the same time, stress distribution is more reasonable
結果表明:最大應力值接近鋁合金車輪的強度極限,充分利用了材料,有效的減輕了重量,應力分佈更加合理。The result shows the maximal stress value in original design is much less than the breaking point of aluminum alloy, which make material wasted. so it is necessary to optimize structure of road wheel
結果表明:最大應力值遠小於鋁合金車輪的強度極限,強度儲備很大,造成了材料的浪費,存在著進一步優化的必要。The distributor shall, at all times during the term of this contract, actively promote and use its best endeavours to increase sales of the products in the territory and shall not do anything that may prevent sales or interfere with the development of sales of the products in the territory
經銷商應在本合同的合同期限內積極推廣經銷產品並盡其最大努力在區域內提高產品銷售量,且不得實施任何可能在區域內阻止產品銷售或干擾經銷產品推廣的行為。In order to fully develop the theory of squeezed branch piles, in particular, the justification of its superior performance in terms of the bearing capacity and sinking displacement, we have derived the analytical formulas of the axial load and the strain at arbitrary depth ; based on existing static loading test results and research on belled pile, together with the analysis of on - site testing data, we have applied the expand theory on sphere holes to the computation of radial stress of squeezed branch piles under hole expansion ; taking the oil pressure of hole expansion in to account, we have find the a branch force under certain hole pressures, hence we can estimate the maximum bearing capacity of single piles ; we have introduced the experiential formulas for the bearing capacity of squeezed branch piles based on its stress characteristic and pile testing data ; we have also done numerical simulations of squeezed branch piles utilizing finite element method software ansys ; we have matched the simulation res ults with those of on - site basic load experiments, regenerating the distributions of stress fields and strain fields of squeezed branch piles, and from those distributions, we can determine the optimal distances between plates and piles
為了完善支盤樁的設計理論,探求支盤樁高承載力和低沉降量的內涵,本文推導出了支盤樁任意深度的截面荷載以及位移隨深度變化的理論公式;基於已有的靜載試驗成果及有關擴底樁的研究成果,從對現場測試數據的分析,將球形孔擴張理論引入到支盤樁擴孔時徑向應力的計算,考慮到擴孔時的油壓數據,求得某一孔壓下的支盤力,據此估算單樁極限承載力;同時根據對支盤樁的受力特點和試樁數據的分析,提出了支盤樁承載力計算的經驗公式;用有限元分析的方法,利用大型有限元分析軟體ansys對支盤樁進行數值模擬,並將模擬結果同現場的靜載試驗結果進行對比,再現了支盤樁在荷載作用下土中應力場和位移場的變化,根據應力場和位移場的變化范圍,指出最佳盤間距和樁間距;為支盤樁的設計和施工提供了一個可量化的設計依據。At the same time, a series of development trend in organization structure innovation under the information environment has been put forward : flat model is the basis of organization structure optimization ; flexibility not only is beneficial to organization creation, innovation and accelerating reaction speed, but also strengthens organization ' s control centripetal force during the process of being operated continuously. it has rapid adjusting ability in time according to unexpected results of predictable change ; networking can not only decrease internal management cost and realize integration between supply chain and sale chain in worldwide, but also realize enterprise " s completely authorized managemen in order to promote substantial leap in enterprise economic benefit ; virtual model is centralizing limited resources on high additional value function and making low additional value virtual in order that the largest resource support can be obtained in the lowest cost and the whole organization is operated in the most effective way for adapting to market " s rapid change with high elasticity ; creating learning pattern in organization makes enterprise expand the width and depth of information being exchanged with the outer so as to keep enterprise in an unassailable position
提出信息化環境下組織結構創新的一系列發展趨勢:扁平化是組織結構優化的基礎;柔性化既有利於組織的創造、革新、加快反應速度,又能使組織在不斷磨合中加強控制的向心力,具有適時根據可預期的變化的意外結果迅速調整的能力;網路化不僅減少了內部管理成本、實現了企業全世界范圍內供應鏈與銷售環節的整合,而且實現了企業充分授權式的管理,極大地促進了企業經濟效益,實現質的飛躍;虛擬化是將有限的資源集中在附加值高的功能上,而將附加值低的功能虛擬化,以最小的代價獲得最大的資源支持,從而使整個組織以最有效的方式運轉,以高彈性化來適應市場的快速變化;創建學習型組織,使企業拓展了與外界進行信息交流的廣度和深度,使企業立於不敗之地。分享友人