elastic time effect 中文意思是什麼
elastic time effect
解釋
彈性後效-
In the paper, not only such factors as reinforcing steel bar, various placing temperature of concrete in case of lift placements, lift thickness, time interval between lifts, the variation of elastic modules of concrete, heat of hydration, the temperature changes of environment but the effect of creep deformation and autogenous volume change on the temperature field and thermal stress field of reinforced concrete face - slab are considered
本論文在分析中，考慮了鋼筋、混凝土分層澆築、入倉溫度、澆築層厚、施工間歇、混凝土彈性模量變化、水化熱發散規律、外界氣溫等因素的變化及混凝土徐變和自生體積變形等因素對面板溫度場和溫度應力的影響。 -
With the consideration of the vertical wave effect of soil and soil - pile interaction, an approximate analytical solution to vertical vibration of pile system with variable impedance in visco - elastic layered soil is developed. a simplified and practical mathematical model for interaction between soil layers is proposed, and its applicability is theoretically investigated. based on this model and by using laplace transforms and the transmit property of impedance function, the analytical expression of the impedance function and solutions of the displacement and velocity response function in frequency domain and in time domain at the pile head are derived
4 、從三維軸對稱土模型出發，對考慮樁土耦合作用、土層層間聯系以及樁周土豎向應力梯度變化條件下的成層粘彈性土中完整樁及變阻抗樁系統縱向振動問題進行了研究，提出了成層土中變阻抗樁系統縱向振動問題的近似解析解法和樁周土層層間相互作用的簡化而實用的數學模型，並利用拉氏變換和阻抗函數的傳遞性，獲得了成層土中任意段變阻抗樁樁頂阻抗函數的解析表達式，以及樁頂速度導納和時域速度響應解析解和半解析解。 -
In those experiments wave shapers have been utilized to modify the incident wave so that the condition of constant strain rate is satisfied more sufficiently. the effect of outer factors on the stress equilibrium of early stage in the specimen was analyzed, and the methods to improve the uniformity of stress in specimen at early stage were given. the elastic wave velocity of specimens can be determined by the wave shape fitting of the predicted transmitted wave with the measured transmitted wave at the early stage, furthermore, the shifting - time in shpb data processing can be determined
在shpb實驗中採用波形整形技術使入射波的上升沿變寬；分析了影響shpb實驗中試件早期應力平衡的外部因素，給出了改善早期應力均勻性的方法；採用透射波的早期預估波形與實測波形作對比的方法確定了shpb實驗數據處理中的延遲時間；因而在實驗中得到了比較準確的應力應變曲線。 -
In the process of building and using the mass concrete structures, because of the effect of out - side condition and themselves, some faults will form in the structure, these faults will effect the bearing capability and endurance using nondestructive testing method to test the concrete ' s quality and diagnose its healthy, which has the significant sense in assessing the safety stability and research of the administering diseases this dissertation mostly researched the testing methods in the mass concrete structure, discussed the principles, methods, features, sphere of application of the ultrasonic testing in the mass concrete structure with faults, used dynamic fem to simulate the testing process, discussed when the concrete structure with cracks is under the effect of the pulse, how the elastic waves propagate and what are their changing feature, researched the principles of the first - arriving waves " phase when the cracks " depths are not same, obtained the relation between the inversion point and the cracks " depth, which has the direction sense in the application of projects, the second part of this dissertation is ct, which used the ultrasonic wave running through the tested - substance to get arriving - time of the ultrasonic wave, then inverse the image this dissertation drawed one ct program which can well present the different little cells " ultrasonic wave velocity profiles of the substance, thereby to diagnose the quality of the part of the tested - substance, ct has the better using foreground.
在混凝土結構的施工及使用過程中，由於受其自身及外界各種因素的影響，常常會產生一些缺陷，對結構物的承載能力和耐久性造成嚴重影響，採用無損檢測技術進行質量檢測和健康診斷，這對混凝土結構開展安全、穩定性評估以及病害隱患治理研究具有重要意義。本論文主要針對大體積混凝土結構缺陷的檢測方法展開研究工作，重點討論了超聲波法檢測混凝土結構裂縫的基本原理和方法及其特點、適用范圍，運用動力有限元數值模擬其檢測過程，探討了有裂縫缺陷的混凝土結構在脈沖荷載作用下彈性波的傳播及其變化特徵，研究了不同裂縫深度下首波相位變化規律，得出了反轉臨界點與裂縫深度之間的關系，這對實際工程應用具有指導意義。聲波ct是一種新的無損檢測技術，它是利用聲波穿透被檢測體獲取聲波接收時間，來進行計算機反演成像的技術。 -
In flexible multibody systems, the rotation of some parts with little specific gravity at high speed always cause the phenomenons of dynamic stiffening. at this time, the effect of elastic movement of parts on dynamic behavior of systems ca n ' t be ignored
在柔性多體系統中，很多部件的比重小且在系統工作時處于高速的旋轉狀態，經常導致動力剛化現象的發生，此時部件的彈性運動對系統的動力學行為有著不可忽略的影響。 -
The results show that the elastic membrane thickness, actuator span and gap spacing have a strong effect on the deflection, the actuator undergoes the deflection increasing nonlinearly at voltages below pull - in voltage and snap through instability at voltages above pull - in voltage when subjected to a voltage ramp, the re - set time and repeatability are attractive when the actuated voltage is set to zero
結果表明，驅動器的彈性薄板厚度、跨度和電極間距明顯影響變形位移；驅動器的變形位移隨驅動電壓的增加出現穩定的非線性增加和不穩定的「拉入」現象；驅動電壓撤除后鏡面回復時間短，重復性好。 -
The research indicate that the structured soft clay has below several characteristic, the viscous strain is produced during the stage of primary consolidation and of second consolidation, and in the prophase, the relation of stress - strain - strain rate is unique, so the form of constitutive model, such as, f ( v ', e ) = 0, f ( ' v, e, t ) = 0, ca n ' t describe strain behavior of soil skeleton rationally ; the time - dependent properties involve three aspects, in addition the time - dependent strain, apparent preconsolidation pressures that depend on strain rate, and the effect of creep compression on apparent preconsolidation pressures ; because of holding structural strength, the mechanics characteristic is determined by the magnitude of stress, and the compression curve is composed of several sections. by combining structural yield stress and it ' s characteristics with the improved time line model, a new one - dimensional elastic visco - plastic consolidation model is established
研究結果表明，結構性土的固結過程具有以下特性：主固結和次固結階段都包含有因土骨架的粘滯性移動而產生的變形，而且在正常固結階段，存在應力?應變?應變速率的唯一性， f （ _ v ， e ） = 0 、 f （ _ v ， e ， t ） = 0形式的本構關系不足以描述土骨架的變形行為；固結壓縮過程中的時間效應包括三個方面的內容，除了應力應變關系與時間相關外，還包括粘滯性變形引起表觀前期固結壓力增加和屈服應力的應變速率效應；軟土的結構性使其力學特性與應力水平相關，壓縮曲線具有分段性。 -
In this article, idealized elastic plastic model and three - dimension finite elements programs have applied to analyzing and researching the stress and displacement distribution of 4 high - steep slopes excavated on the wan - liang expressway, and the relationship has been gained between the stress existing in excavated rock slopes and stability coefficient with depth change through the self - made fortrain program ' s application to the computation of slopes " stability coefficient ; at the same time, through the analysis of the slopes " stability coefficient, such conclusion has been gotten that cohesion in the slipping zone has important effect on slopes " stability and some proposals have been presented to improve the anti - shearing ability of the slipping body through enhancement of the cohesion in the slipping body
本文採用概化均質的理想彈塑性模型，利用三維有限元程序分析了萬梁高速公路4個高陡邊坡開挖各階段的應力及應變分佈，並且編寫了fortran程序用於邊坡穩定系數的計算，得出邊坡巖體應力及穩定系數隨著開挖深度的變化關系。並對邊坡穩定系數的敏感性進行了分析，得出滑帶內聚力的變化對邊坡穩定性至關重要，提出了改善滑帶巖土粘結狀態提高抗剪能力的工程措施。 -
4. with the consideration of practical soil - pile interaction, the soil around pile is modeled as a three - dimensional viscous - elastic continuous medium and the time effect of the settlement of single pile is studied. the semi - analytical solutions for vertical displacement of soil and for the relationship between settlement of pile head and time were obtained by laplace transform method and fourier inverse method, and the law of the settlement of pile head varying with time was then analyzed and discussed
考慮樁土藕合作用的單樁沉降時間效應研究從研究空間軸對稱問題的角度出發，將樁周土體建模為三維粘彈性連續介質，更為合理地考慮了靜荷載下樁土系統中單樁與樁周土的藕合作用，分別建立了樁周土體和樁體的靜力平衡方程，並通過拉普拉斯變換、傅立葉逆變換等數學手段，獲得了單樁樁周土體的垂直變形和樁頂沉降在拉普拉斯變換域內的解析解和在時間域內的半解析解，進而分析討論了單樁沉降隨時間變化的規律。
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