粘彈性地基 的英文怎麼說
中文拼音 [niándànxìngdejī]
粘彈性地基
英文
viscoelastic foundation-
And gave priority to the eular - bernonulli beam model, the simply and convenient analytical resolution for the response of the pipelines under dynamical traffic loads through the impulse function and the congruence method of the vibration form and so on. during the analysis of the chanmical results of the pipelines, the randomicity of the output of the pipelines response was taken into accout. so the stochastic process method was applied to describe the probability characters of the pipelines response, which made the results truer, more veracious
本文採用eular - bernonulli梁模型和tomosimko梁模型對動力下kelvin粘彈性地基中管道固有振動性狀進行了分析,提出了各力學結果描述的解析式;並以eular - bernonulli梁模型為主,基於脈沖函數、振型迭加法等對管道在動力交通荷載作用下的管道響應問題提出簡單便捷的解析演算法;在管道受力結果的分析中,考慮管道響應輸出的隨機性,將管道響應用隨機過程來描述其概率特徵,使得結果描述更加真實準確。As to planar visco - elastic prediction of settlement, this paper fixes on range of the back - calculation parameters range, analyzes back - calculation parameters which are indispensably in the course of anti - analysis. since it is difficult to acquire the optimization result in simultaneous back - calculation, this paper puts forward a calculation method which combined with investigation data and field experiment data to minimize the parameters to get optimization
( 2 )針對二維粘彈性沉降預測,確定了模型反演參數的取值范圍,對于多層軟土地基變量同時反演很難獲得最優解的問題,提出結合工程勘察和現場實驗以減少參數的方法獲得最優解。Then the judging method is proposed, and the proposed method can consider the stress history and viscosity shear strength of soft soil. in this paper, a fem program dpfbm1. 0 ( double plastic foundation beam method ( version 1. 0 ) ) is established. with this program, the influence of some parameters on foundation excavation is fully studied, the parameters include : compression modulus, cohesive strength, angle of internal ficiction, effective angle of internal friction, the embedded length of the wall and building load
針對當前國內外彈性地基梁法存在的缺陷,基於對軟土流變性的研究,採取了剪應力判斷彈塑性狀態,以改進和完善基坑工程彈性地基梁法,推導了彈性狀態下地基反力系數的近似解,提出了採用剪應力組合判斷土彈簧彈塑性狀態的方法,編制了相應的彈塑性共同變形法分析程序dpfbm1 . 0 ( doubleplasticfoundationbeammethod ( version1 . 0 ) ) ,並採用該程序分析了壓縮模量、粘聚力、內摩擦角等參數變化對基坑工程的影響。The beam - on - dynamic - winkler - foundation ( bdwf ) model was utilized to determine the lateral dynamic response of a pile with finite length in a viscoelastic soil. an analytical solution was obtained in the time domain for the vibration of a pile under a laterally cyclic force applied at the pile head. based on the solution, the transient response of the pile loaded by semi - sine force was acquired with superposition principle
首先,基於動力winkler模型( bdwf )對粘彈性地基中有限長樁的水平動力響應問題進行求解,得到了單樁在樁頂受水平簡諧荷載作用下的時域解析解,並在此基礎上通過疊加原理得到了半正弦激振條件下的瞬態解析解。Two of the most predominant characteristics of surface wave are dispersion and attenuation which are the effective tools to study the velocity structure and viscidity structure of the earth interior
頻敵和衰減是面波傳播中的兩個基本特徵,利用面波頻散和衰減可以有效地研究地球內部速度結構和粘彈性結構。Novak layer method is introduced to obtain the vertical dynamic impedances of both an end - bearing pile and a floating pile in a homogenous stratum. and the vertical dynamic impedances of single pile are analyzed in homogenous elastic soil, inhomogenous viscoelastic soil homogenous viscoelastic soil. at the same time, the factors to influence the impedances of single pile are examined
本論文採用novak薄層法,推導了在均質地基中,端承單樁和摩擦單樁的動阻抗;並全面分析和對比了均質彈性、均質粘彈性和非均質粘彈性地基模型中的單樁的動力阻抗,考察了各種因素對單樁動力阻抗的影響程度。The result indicates that the nonlinear elastic model is appropriate for better foundation condition, while the viscoelastic model is appropriate for worse foundation condition. according to the uniqueness of back analysis solution, it is put forward a method for the back analysis of layer - wise and section - wise iteratively. which is showed advantage by the calculation result
分析表明,非線性彈性模型一般適合地基較好的情況,而對于地基較差的情況宜採用粘彈性模型;針對反演計算解的唯一性問題,提出了分層分部反演迭代的計算方法,計算表明,該方法具有一定的優越性。In order to develop and consummate the analysis theory and calculation method of base - isolated structures, based on the research on restoring force model of isolation systems and the analysis on the nonlinear seismic response of base - isolated structures, the analysis on multi - dimensional and lateral - torsional coupled seismic response of base - isolated structures is developed in this paper. according to the mechanical performance of isolation systems, detailed analysis and improvement of the present research, an unilateral and a bilateral coupled visco - elastic hysteretic model for rubber bearings, an unilateral and a bilateral coupled visco - elasto - plastic differential hysteretic model for lead rubber bearings, an unilateral and a bilateral coupled modified visco - plastic differential hysteretic model for sliding friction bearings are proposed
為進一步發展和完善基礎隔震結構分析理論和計算方法,本文以隔震系統恢復力模型研究及基礎隔震結構非線性地震反應分析為基礎,對基礎隔震結構的多維地震反應及平?扭耦聯地震反應開展了以下幾方面的研究工作:根據隔震系統力學性能的特點,在現有研究成果的基礎上,對隔震系統恢復力計算模型進行了改進和創新,提出了普通疊層橡膠支座單向及雙向耦合粘彈性恢復力計算模型,鉛芯疊層橡膠支座單向及雙向耦合粘彈塑性微分型恢復力計算模型,摩擦滑動支座單向及雙向耦合修正粘塑性微分型恢復力計算模型。To reflect this, a rut developing model, which is based on viscous - elastic theory and consider dynamic vehicle load, is founded. from simulating result, the model can better explain the regular of prophase and metaphase of rut developing
針對這一問題,課題建立了基於粘彈性力學理論的車轍發展模型,在模型中考慮動載作用的影響,此模型很好地解釋了車轍發展的前期和中期規律。In the present, the models used widely are two kinds : the continuous model. the continuous model is supported by " smearing out " the discrete support along the track. giving a continuous viscoelastic foundation and a continuous layer represent sleepers
目前所使用的計算模型主要分為兩種:一種為連續型模型:將沿軌道方向的離散支撐連續化,將枕木模擬為剛體或為有均布質量和剛度的梁,使枕木成為粘彈性地基上的連續層。Two matlab programs are provided to get the numerical results. calculating examples are presented to illustrate the important role of viscosity of foundation in limiting the development of deflection
並編制計算程序,求出數值解;對比彈性和粘彈性地基上矩形板的撓度解,指出地基粘性效應限制地基沖擊撓度的發展。According to actual performance of rigid and flexible surface layer, visco - elastic model and elastic plates model are adopted to respectively simulate flexible and rigid surface, and the foundation is considered as transversal isotropic elastic body
基於面層的實際特徵,分別採用粘彈性模型和彈性薄板模型模擬剛性和柔性面層,地基則採用了本文所探討的地基模型。The results indicate that the seismic responses of pier under the viscous - spring boundary are less than that under the fixed boundary, and the seismic responses of pier on the site with the frozen layer are much less than that without the frozen layer
結果表明類場地上的挖井基礎橋墩,來用粘彈性邊界時的橋墩地震反應比固定邊界時的地震反應小;凍土時的地震反應比融土時的地震反應明顯減小。Numerical viscoelastic modeling for porphyroclast rotation in ductile shear zones is done by a viscoelastic finite element program based on detailed investigation to three ductile shear zones, the taihangshan mountains, north china. in this model porphyroclast garnet is assumed as isotropic elastic material with small elastic deformation, while the matrix quartz, feldspar as viscous fluid maxwell material which has increasing deformation with time. the viscosity of matrix is supposed to be 10
採用粘彈性力學分析程序對太行山阜平地區剪切帶中斑晶旋轉問題進行了有限元數值模擬。在計算模型中假定:石榴石斑晶為彈性材料,在應力作用下只產生很小的彈性變形石英長石質的基質部分為粘彈性材料,它具有隨時間變形不斷增大的特性。Form the observation date obtained during construction, the geological parameters may reasonably be determined by direct optimal method such as powell so that it minimizes the squares of differences between calculated and measured quantities ( objective function ). adopting fem and the roadbed settlement after construction is calculated. then a back analysis program of fem for soil is given
文中首先基於biot固結理論分別採用e - v非線性彈性模型和merchant粘彈性模型兩種模型有限元方法,根據施工期實測資料,採用直接優化反分析方法,分層分部反演地基土體的計算參數,然後計算路面鋪筑後的工后沉降,並對將通過兩個軟土路基工程實踐驗證其可靠性。According to the analyses of the visco - elastic and visco - plastic rheological properties of grey silt - like soft soils in yingkou district, the author interpreted that tyey show different rheological proprties as time and stress level changed
基於營口地區淤泥技粉質粘土的粘彈性及粘塑性流變特性,指出二者隨時間和應力水平的變化表現出不同的流變特性。Spline based semi - analytical procedure for dynamic flexibility of visco - elastic non - homogeneous foundation
粘彈性非均質地基動力柔度的樣條半解析解法3 ) the single pile horizontal dynamic impedance function in visco - elastic ground considering axial loads is first derived in this field, and the parameter analysis shows that the variation of single pile horizontal dynamic impedance cannot be neglected when considering the axial loads, and it ' s appropriate to considering the axial loads when calculate the single pile horizontal dynamic impedance
3 )首次推導了粘彈性地基中考慮樁頭軸向力時單樁的水平動力阻抗函數,通過參數分析發現,軸向力對單樁動力阻抗剛度存在不可忽略的影響,當軸力較大時,計算單樁的動力阻抗以考慮軸力為宜。Based on the transform of coordinate and principle of superposition, a generalized integral formula dealing with moving load problem is established. an impulse response function used in the integral is obtained by means of laplace and hankel transform
在論文中,基於線性系統的疊加原理和坐標變換,建立了求解移動荷載作用下粘彈性地基板的動力響應積分公式,把運動荷載問題轉化為獲取位移脈沖響應函數。Furthermore, the analytical solution for the lateral vibration of single pile embedded in layered soils was obtained, and the influence of the shear deformation on the lateral dynamic response was examined
在此基礎上,進一步得到了成層粘彈性地基中考慮樁體剪切變形的單樁水平振動解析解,並分析了樁基剪切變形對水平動力響應的影響。分享友人