cooling stress 中文意思是什麼
cooling stress
解釋
冷卻應變-
Based on the simulation model theory of temperature and stress fields presented in this article, a large simulating program for high rccd has been developed, which can numerically simulate all kinds of temperature control measures, including water pipe cooling, heat insulating in winter, reducing place temperature of concrete, spraying water brume, and long interval over - watering surfaces overflowing in flood season.
基於本文提出的溫度場和徐變應力場模擬模型理論，編制了高碾壓混凝土壩的三維有限元模擬計算程序，在程序中考慮了各種溫控措施的數值模擬，包括：水管冷卻、冬季保溫、降低混凝土的澆築溫度、夏季混凝土表面噴水霧、施工汛期壩頂面過水等。 -
The stress status of concrete at face of sluice pier in the case of cold wave, pipe cooling and cast - in - place partial sluice pier and so on
研究了寒潮、水管冷卻、整澆部分墻體等情況下閘墩表面混凝土應力分佈狀況。 -
The welding technology of francis turbine runners is optimized from the view of subsection welding and local heating by numerical simulation. the result shows that welding residual tensile stress appears in the weld and its area nearby, and peak stress appears in the dangerous area of blades after practising quondam welding technology ; welding residual tensile peak stress in the dangerous area of blades can be decreased by welding both ends earlier and then welding middle section later during subsection welding, and decreasing effect on welding residual stress of the subsection welding is related to the weld length of blade outlets and welding direction of each subsection ; decreasing effect on residual stress of the local heating is direct proportional to heating time, heating temperature, heating area, and inversely proportional to cooling area, and welding residual tensile peak stress in the dangerous area is decreasing trend earlier, and then increasing trend later with heated location increased
本文利用數值模擬手段對轉輪的焊接工藝從分段焊和局部加熱兩個方面進行了優化，結果表明:採用普通工藝焊接時，葉片焊后殘余拉應力出現在焊縫及其附近區域，並且在葉片出水邊的熔合線附近（危險區域）出現了峰值;在採用優化的分段焊時，先焊兩端后焊中間的方法可以降低葉片危險區域的焊接殘余拉應力峰值，降低效果與葉片出水邊焊段長度、焊縫各段的焊接方向有關;局部加熱法降低轉輪危險區域殘余應力的效果主要與加熱時間、加熱溫度以及加熱面積成正比，與冷卻面積成反比，並且危險區域的殘余應力隨加熱區域的增大呈先降低后升高的趨勢。 -
Thermal stress analysis of helium cooling lines in control valve box for bepc ssm magnet
磁體控制閥箱內氦冷卻管線熱應力分析 -
In the program, the effect of lamination placement, construction interval, elastic modulus change, thermal insulation change, surrounding temperature change, concrete creep and autogenous volume change on thermal stress are considered. and such temperature control measurement as water pipe cooling, heat preservation of the dam surface, the pouring temperature control, the overflow across the dam top during flood season can also be simulated by numerical method
該程序在編制過程中考慮了混凝土分層澆築、施工間歇、彈模變化、絕熱溫升過程、環境溫度的變化、混凝土徐變、自生體積變形等因素對壩體溫度場及溫度應力場的影響，同時也考慮了水管冷卻、壩體表面保溫、控制澆築溫度、施工汛期壩頂面過水等各種溫控措施的數值模擬。 -
The results indicated that, the fabrication process of ultra - fine grain material is mainly determined by the stress, rotate speed and the flux of cooling water. the grain refining and the hardening effect are mostly affected by the rotate speed and the flux of cooling water. compared with commercial ly12, the invalidate strength and the prolongation rate of the ultra - fine grain material are properly improved in the measurement of compression property ; and the abrupt change of the dilatability of the ultra - fine grain material at 500c is found ; also the phenomena of which the grain size of these microstructures is stable when annealed under 300c is observed
研究表明，採用本文提出的摩擦壓扭強變形區轉移法可以得到棒狀的超細晶材料，軸向壓力、扭轉速度和溫度是採用該方法制備超細晶材料的主控參數；試件的旋轉轉速和冷卻速度對變形區晶粒細化和硬化效果影響顯著；超細晶ly12的壓縮性能與淬火+自然時效狀態的ly12壓縮性能相比，斷裂強度和延伸率均有一定程度的增強；超細晶ly12的熱膨脹系數在550左右發生明顯的變化。 -
Abstract : thermally induced stress and the relevant warpage cause by inappropriate mold design and processing conditions are problems that confounded the overall success of injection molding. a thermorheologically simple thermoviscoelastic two - dimension material model is used to simulate the residual stress and warpage within injection molded parts generated during the cooling stage of the injection molding cycle. the initial temperature field corresponds to the end of the filling stage. the fully time - dependent algorithm is based on the calculation of the elastic response at every time step. numerical results are discussed with respect to temperature and pressure
文摘:不均勻的熱殘余應力及其變形是注塑成型加工中常見的工程問題之一.應用熱流變簡單材料的二維熱粘彈本構方程得到的遞推公式，數值模擬了成型中的熱殘余應力及其翹曲變形，並用數值實驗討論了溫度、壓力對注塑件殘余應力及變形的影響，發現溫度變化不均勻是注塑件翹曲變形的最主要原因，其影響遠大於壓力的作用，與工程實驗的結論一致 -
Based on these, the 200mw turbine unit of panxian thermal power plant is selected, and the key problems are analyzed, such as, selection of cool medium, flow path of medium, thermal stress during fast cooling etc. the cfd software is adopted, and the maximal thermal stress, the optimum cooling model and system, and the autocontrol scheme during fast cooling, are gotten. in the end, the results are applied in the site. the optimum cooling model and system, and the autocontrol scheme would be provided reference as the other similar units
於此，本文以盤縣發電廠200mw汽輪機為研究對象，對發電廠汽輪機組空氣冷卻裝置及系統現狀深入分析基礎上，應用cfd軟體數值模擬了不同工況時汽輪機缸壁溫度變化情況，對200mw汽輪機快冷過程中控制指標進行分析，優化機組的快速冷卻過程，合理快冷設備、系統，優化控制曲線，分析最大熱應力值及最佳冷卻方式選擇，同時，對現有盤縣發電廠汽輪機組快速冷卻系統進行優化改進，並進行了實驗與實施。 -
The properties of nd : glass rod lasers in the heat capacity operation, including the temperature and stress distributions, are simulated and compared with the conventional pumping and cooling scheme
摘要對釹玻璃棒狀激光器在熱容型的運行方式下的特性，包括溫度和應力分佈作了分析，並和常規抽運和冷卻方式下棒橫截面的溫度和應力分佈作了比較。 -
Evaporative cooling has been regarded as a new cooling technology on hydro - generator, and it not only could increase the ratio of material utilization and reduce the difficulties of making large - scale hydro - generators, the running difference in temperature, the stress of the generator ' s stator and the possibilities of the incidental occurrences, but also has better performance than internal water cooling
蒸發冷卻作為水輪發電機的一種新型冷卻技術，不僅可以提高材料利用率，減小特大型發電機製造難度，降低發電機定子繞組運行溫差和發電機定子的應力，減少事故隱患，更重要的是蒸發冷卻比水內冷具有更好的優越性。 -
Based on several actual cases, the temperature control measures for roller compacted concrete ( rcc ) gravity dam and arch dam such as structural jointing for construction ; lowering of concrete placing temperature ; water pipe cooling ; surface insulation ; inclined - layer placing etc., the measures to improve the material properties i. e. the application of micro - expanding concrete ; enhancement of material crack - resistance property and the requirement for the simulative analysis on both the temperature field and stress field as well as some problems concerned are summarized herein on the basis of the analysis on the material properties ; construction characteristics and the changing characteristics of the thermal stress of roller compacted concrete
摘要從碾壓混凝土的材料特性、施工特點、溫度場溫度應力的變化特點入手，結合幾個工程總結了碾壓混凝土重力壩、拱壩的分縫方式，降低澆築溫度、水管冷卻、表面保溫、施斜層碾壓等溫控措施，採用微膨脹混凝土、提高材料抗裂性能等改善材料性能措施及碾壓混凝土溫度場、應力場模擬分析的要求和應注意的問題。 -
The inner stress produced by quick cooling during quenching is the basic reason of formation of quench - distortion of parts
摘要淬火過程中的快速冷卻在工件內部產生的內應力是導致淬火變形的根本原因。 -
According to the concrete ages of different grout compartments, the concrete temperature rising process and the arching temperatures etc., aiming at the optimization of technology and economy, the paper studies systematically the feasibility of applying different temperature control measures in different seasons and at different elevations ; and obtains characteristic parameters of arch dam temperature fields and stress fields so as to provide a basis for construction units to implement second stage cooling or third stage cooling according to particular demand at that time
為了達到技術上與經濟上雙優的目的，根據不同灌漿區的混凝土齡欺、混凝土溫升過程、封拱溫度等，系統研究了在不同季節里、在不同高程上採取不同溫控措施的可行性，得到了拱壩溫度場與應力場的特徵參數，為施工單位根據當時的特定需要，進行二期冷卻或三期冷卻提供了依據。 -
We calculate the stress fracture limit, critical index limit and melting limit in a high power double clad fiber laser. the results show that the average output power decreases when the temperature is too high. to maintain the pumping efficiency and the output power, some cooling methods should be used when the output power reaches a certain level
給出了熱效應對雙包層光纖激光器影響的裂解極限、臨界折射率極限和熔化極限與光纖結構參數和泵浦功率的表達式，理論分析和數值模擬結果表明對于高功率的雙包層光纖激光器溫度很高時激光增益下降，在一定的功率水平上需要進行外界的冷卻，以保證泵浦激光的效率和高功率的激光輸出。 -
The neutron flux extracted to different angles has been calculated. finally, the heat depositions in the target, the reflector and the moderator have been calculated. based on these results, the temperature and stress distribution hi tungsten target under different cooling condition have been calculated too
最後計算了靶、反射體以及不同慢化器（水、液態氫、液態甲烷）中的熱量沉積，並以此為依據，利用工程軟體ideas進一步計算了各種冷卻條件下，靶中溫度場與應力場分佈。 -
This segregation behavior of sn accords with the mechanism of non - equilibrium segregation. it can be obtained through the theoretical calculations that the critical time of sn non - equilibrium segregation is 124 seconds at 750 and the critical cooling rate is 8 / s when cooling from 1320. it is suggested that controlling the cooling rate during continuous casting to avoid the critical cooling rate ( 8 / s ) and avoiding high stress near the trough temperature ( 750 ) may control the form
通過研究殘留元素sn的偏聚機制及其對o . 15wt . % c鋼熱塑性的影響，對試驗鋼進行脆性預測:建議在該鋼的連鑄過程中彎道矯直溫度盡量避開塑性谷底溫度750 ，二冷區的冷速盡量避開臨界冷卻速率8 / s ，從而可以減少該低碳鋼連鑄坯表面裂紋和橫向裂紋，提高其成材率。 -
The influence of different structural parameters ( diameter and shape of cooling water pipes, distance between cooling water pipes, thickness of stave and cast in bricks ) on the steady state highest temperature and thermal stress of cooling stave was numerically simulated and analyzed by engineering software ansys
摘要採用有限元分析軟體ansys計算並分析了不同結構參數（冷卻水管形狀和直徑、冷卻水管間距、冷卻壁鑲磚厚度及冷卻壁壁體厚度）對冷卻壁最高溫度及熱應力分佈的影響。 -
It is found during the cooling down in some local region that the normal stress difference varies from positive to negative and then turns positive again. the stress accumulates rapidly in the followed thermal treatment in this region, where the chip - on - board package tends to fail from
在冷卻過程中某些局域正應力差的變化規律為：該差值從正值變到負值再回到正值，呈振蕩狀態；局域隨熱循環進行應力將急劇增加，即處于應力相對集中的狀態，這樣的區域是晶元易於失效的區域。 -
On the other hand, for the pre - press stress being threw by the hub was inserted after cooling with liquid nitrogen, the poor transverse tension strength of the multi - ring flywheel rotor could be counteracted. so the rotate speed and energy storage density can be increased efficiently
而採用多環套裝纏繞技術製造的多層飛輪輪環，在利用溫差過盈裝配方法給復合材料輪環施加預壓應力后，能夠有效避免飛輪轉子的復合材料輪環部分因較低的纖維橫向抗拉強度而破壞失效，從而大幅度提高飛輪轉子的極限轉速和儲能密度。 -
The effect of cold wave, layer thickness of construct and sluice to temperature field and stress field are studied. this paper analysis the effect of the first stage cooling and the second stage cooling. pertinent measures of temperature control and crack prevention are suggested, settling the practice problems in projects
重點研究了寒潮、澆築層厚和蓄水等對拱壩混凝土溫度場和應力場的影響；對壩體一期冷卻和二期冷卻的冷卻效果進行了詳細分析；並針對性地提出了相應的溫控防裂措施，以解決工程實際問題。
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