環向應力 的英文怎麼說
中文拼音 [huánxiàngyīnglì]
環向應力
英文
circumferential stress-
After molting three times, the zoea enter the mysis stage during which they begin to look more like adult shrimp and swim in a characteristic fashion with head and tail pointed downwards at right angles and occasionally performing a sudden retrograde jumping action. this is known as the inversion state, the fry being suspended upside - down in the upper middle region of the pond water. this is, therefore, also called the " inverted suspension phase "
眼幼蟲脫第三次即進入糠蝦期幼蟲期mysis stage ,此期之體形已略成蝦之狀態,且具特有之游泳姿態,即頭部及尾部均向下,成一直角彎曲而時作向後跳躍游動,又因成倒立狀態,懸浮於水中的中上層,又叫倒吊期,此期幼蟲對外界的環境因素,如水溫鹽分等變化,比前兩期來得更具適應力,主要餌料為豐年蝦brine shrimp的幼蟲,但其他大小略同的動物性浮游生物,如橈腳類copepoda輪蟲類rotifera均可。Similar cyclic stresses may have occurred due to wind-induced swaying motion during storage.
同樣在存放時由風力引起的橫向擺動也可以產生類似的循環應力。The cyclo - hoop effect which steel tubular has exert to the concrete shows the character of heterogeneous in the arch rib section, the same to the axial direction. the paper verifies the change of the material poisson ration and the concrete grade will make the cyclo - hoop effect obvious alteration, the change of the cyclo - hoop effect and the stress redistribution of the section produced by the shrinking and creeping of the concrete and the expensive concrete on the section
在鋼管混凝土拱肋斷面上,鋼管對內填混凝土的環箍效應具有非均勻性,在拱軸方向上環箍效應也呈現非均勻性。驗證了材料的橫向變形系數、混凝土標號等參數的變化將引起環箍效應的明顯改變;混凝土的收縮、徐變和膨脹混凝土的應用導致鋼管混凝土的環箍效應發生變化並使截面的應力發生重分佈;並總結了其變化的基本規律。From the numerical modeling results, it can be found that there is a clockwise gyre in the middle part of bohai sea, whether in wintertime or in summertime. in summer, the clockwise gyre corresponding to the high - temperature and low - density center in the middle bohai sea is mainly dominated by the density circulation. and in winter, it is mainly dominated by the wind stress curl
通過數值模擬結果發現,在渤海中部,無論冬季還是夏季,都存在一個順時針的渦旋運動,夏季,對應于渤海中部的高溫低密中心,其流場主體部分呈順時渤海冬夏季環流特徵及變異的初步研究針向旋轉,這主要是密度環流占優的結果,而冬季的順時針向的旋轉,主要是海面風應力旋度影響的結果。Prestressed cable truss has some characters of transparency, safety, simplicity, dexterity, and beauty. due to these peculiarities there is a splendid prospect when the structure is used in the glass curtain. therefore, it is becoming warm and important problems to study its structural components and behaviors
預應力索桁支承體系具有通透、安全、靈活、工藝感強以及環保節能等諸多特點,決定了該體系在點式玻璃幕墻中具有廣闊的應用前景,因此,對其受力性能進行研究,日益成為結構工程學科研究的重要方向和熱點問題。Following, using the experimental methods, the dynamic response of the stiffened conical shells under cosinoidal impulsive loading is studied. the changes of dynamic response of points along circumferential line of the conical shells are analyzed, and the characteristics of dynamic response of points are studied by both the time - domain analytic method and the frequency - domain analytic method
採用實驗方法研究了加筋圓錐殼在側向餘弦載荷作用下的動力響應,分析了沿環向各點的響應變化,並從時域和頻域分析了它們各點的響應特性。It can be noticed that both r and t specimens show initial hardening and subsequent softening at the strain amplitude higher than 0. 8 % and cyclic softening from the beginning to fracture under strain amplitude less than 0. 8 % at room temperature, and the cyclic flow stress was always lower in r specimen than in t specimen at the same strain range
且在相同的應變幅下, t向試樣比r向試樣具有更高的循環流變應力。此外,對r向及t向試樣,低應變幅下呈現出循環軟化現象是因為晶粒旋轉導致循環軟化;而在高應變幅下發生循環硬化是由於孿晶作用的結果。Lastly, the land disposition model was set up at dahe town, hebei province, including town development direction decision, town land scale decision, town land structure optimum. taking use of fuzzy aggregate principle, choosing ground load - bearing capacity, quality of taken up land, groundwater level, economic land use, infrastructure building cost, radiation capability, transport, life environment, town form as evaluation element, the town development direction decision model at dahe town were set up
運用模糊集合變換原理,選擇了地基承載力、土地農業生產力、地下水位、節約用地、基礎設施建設成本、對周邊的輻射、現有基礎設施、對外交通便利程度、城鎮生活環境、城鎮形態等10個評價因子,建立了小城鎮用地空間擴展決策模型,研究表明大河鎮鎮區用地未來的空間擴展主方向應該是東面和東北面。For the stress analysis of dryers under the line load of supporting rollers, according to hoff theoretical solution of thin cylindrical shell under line loads, mangelsdorf approximate solution is modified on the basis of the calculation analysis for 14 sets dryers " dimension by computer programming with matlab software. the approximate formulas of the second largest hoop stress of the middle section of the shell are derived
針對托輥線壓載荷作用下烘缸的受力分析,本文根據薄壁圓柱殼在線壓載荷作用下的hoff理論解,在運用matlab軟體對14組常用烘缸參數進行編程計算分析的基礎上,對mangelsdorf近似解作了修正,並由最小二乘法導出殼體中部截面環向應力次大值的近似計算式。3. seismic response analysis is done by using time history analysis method in aluminum alloy double - layer cable dome and the displacement and the axis stress of the structure under the seismic response are obtained and the results are compared with the ones of the spectrum analysis
採用時程分析法對肋環型鋁合金雙層球面網殼結構進行了地震分析,得出了結構在地震荷載作用下的位移、軸向應力的變化曲線,並且與譜分析結果以及相應的鋼網殼作了比較。( 2 ) respectively by elastic theory analyses and methods of structural mechanics, transverse static analytical equations for flexible pipeline rigid pipeline are established whose outcomes are applied in numerical example to compare those with that by finite element method. ( 3 ) considering interaction of filled soil, pipeline and foundation, with an eye to non - linear soil model, in view of the initial geo - stress field and the effects of interface between soil and pipeline, and by finite element method the calculational model and method are built for transverse stress in pipeline. then, by the great finite element analytical software ansys, those outcomes are applied in calculation example of positive buried pipe to educe the distribution of circumjacent soil pressure and stresses on cross section and to compare it with that calculated by conventional ways before those outcomes are applied in engineering case of positive buried pipe with flexible filled materials to confirm distribution of soil pressures after the measure for reduction and to compare it with measurements. as a result, the model set up in this paper is proved to be applicable after all above - mentioned analyses
本文基於彈性理論和有限元原理與方法,分析了上埋式地下管道橫向力學計算方法和性狀並探討了上埋式地下管道的減荷等問題: ( 1 )在分析現有幾種典型的管道垂直土壓力計算方法的基礎上,探討了影響垂直土壓力的主要因素以及改進的方法; ( 2 )分別通過彈性理論分析法和結構力學的方法,建立了地下管道柔性圓環和剛性管涵的橫向靜力計算方程,並應用在算例中,把所得結果和有限元方法所得結果進行對比分析; ( 3 )考慮填土、管道和基礎的共同作用、土體的非線性特性、初始應力場以及土體和管道的接觸面因素的影響,利用有限元的思路,建立了地下管道橫向力學有限元計算模型和方法,並且採用大型有限元分析軟體ansys ,針對上埋式管道工程算例,得出了管周土壓力以及管道橫截面應力的分佈狀況和規律,並和理論值進行對比;針對施加柔性填料的上埋式管道工程實例,得出了減荷后的土壓力分佈,並和實測值進行了對比。The following results of recent researches were presented on measuring stiffness of a wide range of soils such as clay, sand and gravel, characterizing anisotropic properties of soil induced by external loading, measuring stiffness of base and subgrade materials in the pavement, determining soil properties in a centrifuge model during the flight of a centrifuge, and understanding wave propagation in granular materials under micro - gravity environment with this technique
木文報道了壓電陶瓷傳感器應用於粘土、砂和礫石等不同種類土的研究成果,對應力導致土體各向異性的研究,對路基和地基土的力學特性檢測,在離心模型試驗中的應用,以及在微重力環境下的粒狀材料中波的傳播特性的研究等。Fabrication of the box beam is divided into such parts as reinforcement, formwork, concreting, prestressing, moving and storing of beam, pipe grouting under pressure, end sealing of the beam, water - proof layer on the bridge surface system, protective coating etc. the paper makes description of effective box beam construction technology and workmanship which can be adopted in other projects, such technologies as : manufacturing and fixing of reinforcement, steel reinforcement fixing baseplate, web plate and top plate respectively and lifting the steel skeleton into form, requirements of design and manufacturing and way of utilization for dismantling - erection type formwork and hydraulic formwork, optimization of concrete ratio, concrete pouring process of two ends of beam in priority over the middle, in sequence of first baseplate followed by web plate and top plate at last, concrete pouring in inclined section and in horizontal layer, concrete vibration mainly by external vibrator in assistance with internal vibrator, methods and regulation for steam curing of concrete, dual controls over stress and strain to ensure quality of prestressing workmanship, construction method of effective beam moving by heavy - weight special moving facility, some regulations and key notes about construction of grouting under pressure, beam ends sealing, water - proof layer on the bridge surface system, protective coating
箱梁製造由鋼筋工程、模板工程、混凝土工程、預應力工程、移存梁工程、孔道壓漿工程、梁體封端工程、橋面防水層和保護層工程等施工環節組成。文中介紹的採用胎具製作和綁扎鋼筋,分底腹板和頂板分別綁扎並吊裝鋼筋骨架入模;拆裝式和液壓式兩種模板的設計、製作要求和使用方法;綜合考慮、優化混凝土配合比,混凝土灌注從兩端至中間、先底板、后腹板、再頂板的施工順序和斜向分段、腹板水平分層、附著式振搗為主、插入式搗固為輔的施工工藝,蒸汽養護的方法和規定;應力應變雙控制確保預應力施工質量的施工技術;採用重物移運器有效移梁的施工方法;壓漿、封端、橋面防水層和保護層施工的一些規定和注意事項等都是對箱梁製造行之有效的施工技術和施工方法,並可為以後類似施工作借鑒。The reason that the internal defects little occur at the center points and fissure takes an annular form during three - roll rolling was expounded based on the state of stress and strain at the center of rolled pieces
根據軋件內部的應力應變狀態,闡述了三輥軋制軋件中心點缺陷產生可能性較小和斷裂呈環向裂紋的原因。In order to ascertain stress behavior of steel lined reinforced concrete pipe accurately, according to the fundamental principle of non - linear computation of reinforced concrete elements, the steel lined reinforced concrete penstock on downstream dam surface in a hydropower station is calculated and analyzed, and the distribution of circumferential stress of the steel lined reinforced concrete pipe is obtained, it proves that it is safe and reasonable to use structures of steel lined reinforced concrete penstock in hydroelectric station construction, and can satisfy the requirement of project
摘要為了能夠準確地把握鋼襯鋼筋混凝土管的受力性能,根據鋼筋混凝土單元非線性計算的基本原理,對某水電站鋼襯鋼筋混凝土壩後背管進行了計算分析,得出了鋼襯鋼筋混凝土管環向應力的分佈情況,分佈情況說明了此水電站採用鋼襯鋼筋混凝土壩後背管的結構形式是安全合理的,可以滿足工程要求。( 5 ) conclusion was obtained by the analyzing and studying the mechanics environment of the rock mass and the landslide on right bank : according to the analysis, the present direction of the maximal principle stress was consistent with the present tectonic stress field, the value of the principle stress increased or reduced in special place, and there was tensile stress region at the 2000m or above it on the left bank, the accumulate and adjustment was very limited in 200 years, the calculated result of the landslide indicated that the landslide on the right bank was stable under the various conditions
( 5 )壩址區河谷巖體力學環境及右岸古滑坡體的穩定問題分析得出:河谷巖體應力場的分析顯示,河谷巖體中主應力的方向基本上與現今區域構造應力場的方向一致,在一些特殊地帶巖體的主應力值有所降低或增高,特別是在左岸的2000m高程附近及以上,存在有明顯張應力區。在未來200年流變計算時步范圍內,河谷巖體應力的積累與調整較為有限。同時對滑坡體各種工況條件下的穩定性計算結果表明,右岸古滑坡體在各種工況條件下是處于穩定狀態的。Depending on how the ground surface is denuded, the feature of the current crustal stress field and rock stress environment can be calculated analyzing the result in this paper : by analyzing the recovering feature of the elastic deformation of the rockmass in unload - stage under various pressures, it has been found there is close relationship between the recovering degree of the elastic deformation of the rockmass and the unloading degree of the pressure the direction of the major principal stress in the crustal stress field is not consistent with the direction of the crushing stress regional tectonics borne during the last tectonic movement. the evolving degree of the regional geomorphology evidently affects the current crustal stress field, which changes from the self - weight stress field to the horizontal stress field, with the changing of the eroding degree of the regional geomorphology ranging from valley area to hilly country to flat country. in valley area, where there is two stress belts, the bankslope s tress belt and the self - weight stress belt within the mountain. the direction of the major principal stress is nearly parallel to the ground surface and inclines towards the valley in the bankslope stress belt. it is nearly vertical in the self - weight stress belt
通過本文的研究成果,根據區域性地貌的演化特徵,我們可以大致地對現今地應力場進行判斷:在分級卸荷條件下,巖體中彈性變形的恢復具有明顯的規律性,這種規律對于研究地應力場的演變是有幫助的;地應力場中最大主應力方向與區域構造形跡在最近的構造運動中所受區域性擠壓應力的方向無明顯的對應性;區域性地貌形態的演化程度對現今地應力場的特徵具明顯的影響,隨著區域性地貌侵蝕程度由峽谷區、丘陵區、平原區的變化,現今地應力場特徵由自重應力場、水平應力場為主含少量自重應力場特徵向水平應力場的規律變化;在峽谷區,山體中具有兩個應力帶:自重應力帶和卸荷應力帶,最大主應力方向在卸荷應力帶中近平行於坡面並傾向于河谷、在自重應力帶中近於直立;根據原始地面遭剝蝕的程度,可以大致地估算最大主應力和中間主應力的量值和方向;在丘陵區和平原區,最大主應力的方向近於水平,並與附近區域性侵蝕盆地和河流的展布方向基本平行,根據原始地面遭剝蝕的程度,可以大致估算其最大主應力的量值;根據區域性地貌形態的特徵來分析工程區的現今地應力場特徵,並進而大致了解巖石的應力環境,這種分析方法得出的結論與許多實際的地應力測試成果基本一致,對于大型水電工程地下廠房和壓力隧洞的設計是有所幫助的。The paper mainly discussed the reasons of stress from liquid ammonia pressure vessel causing crack through examing data and experimental results and analysing relevant referential documents and materials, taking 1200 ammonia vessel ' s crack and leaking in a certain fertilization company as an example : there existed remaining welding, stress in the equipment ; there existed a stress decaying surrounding, i. e., moisture 0. 2 %, and temperature > - 5 with o2 or co2 inside ; the higher the intensity of raw materials, more possible it was to have stress decaying crack
摘要以某化肥公司1200氨冷器殼體開裂泄漏的失效分析為例,通過對檢驗數據和結果及有關文獻資料的分析研究,探究了液氨介質壓力容器產生應力腐蝕裂紋的原因:設備中存在較高的焊接殘余應力;液氨介質具備應力腐蝕環境,即含水量0 . 2 % ,且有空氣( o2或co2 )污染(或摻入) ,使用溫度高於零下5 ;母材強度越高,應力腐蝕裂紋產生的傾向就越大。In this paper, the microstructure changes of polypropylene induced by a complex combination of shearing, compression, stretching and friction actions during single pan - milling or co - milling with iron, uhmwpe and waste tire rubber chips ( wtr ) were studied and the stress induced effects were revealed. the structure and morphological development of iron particulates and wtr during pan - milling and co - milling with polypropylene were also characterized. the properties of pp / fe, pp / wtr and pp / wtr / fe composites prepared through pan - milling techniques were investigated
本文利用磨盤型力化學反應器對被碾磨材料施加強大的剪切、環向應力、擠壓、拉伸和摩擦作用,研究聚丙烯碾磨和共碾磨粉碎過程微觀形態結構和性能的變化,以及聚合物在碾磨過程中呈現的力化學現象,並將其應用拓展至金屬、橡膠等體系,研究碾磨粉碎在聚丙烯鐵超微粉體的制備、高交聯密度彈性材料廢舊輪胎橡膠( wtr )的超微粉碎,以及pp fe , pp wtr材料的性能與碾磨作用的關系。Normal stress distribution on the inner cylinder forced by power law fluid flowing in annulus with inner cylinder executing a planetary motion
冪律流體在內管做行星運動的環空中流動時的內管法向應力分佈分享友人