elastic adj. 1.有弹力[弹性]的。 2.伸缩自如的,灵活的。 3.机变的,轻快的。 an elastic body 弹性体。 elastic braces 松紧吊裤带。 elastic force 弹力。 an elastic principle 灵活性的原则。 elastic ribbon 松紧带。 an elastic temperament 开朗的性格。 n. 橡皮线,松紧带,橡皮圈。 adv. -ally
Aimed at this property hi which the effect of visco - elastic parameters appeared in late period , this paper proposes that parameters are not adopted as basic ones to predict settlement unless this computed parameters are similar in the course of back - calculation 针对粘弹性参数对沉降的影响在固结后期才能明显表现,提出通过对不同时间段观测信息反演获得的计算参数基本一致时,才可作为沉降预测的基本参数。
Directed by wave theory of fractured media , the elastic parameters of eda medium are determined in the light of hudson - fractured theory , and christoffel equation gives the formula of the phase velocity of p - wave by which , effects of velocity on behalf of kinetic characteristic and reflection coefficient on behalf of dynamical characteristic form fractured density and azimuty is discussed 本文以裂隙介质的波动理论作指导,根据hudson裂隙理论,求出eda介质的弹性参数。在此基础上,应用christoffel方程求出的地震纵波相速度表达式,探讨了裂缝密度和裂隙方位对代表波场运动学特征的纵波速度和代表波场动力学特征的反射系数的影响。
Systemic numerical tests are made first , to study the parameter sensitivity of cohesion and friction angle and other elastic parameters to the convergence in tunnel . some comprehensive parameter sensitivity laws have been draw thought these numerical tests . the method of emulating back analysis is illustrated secondly , in detail by tracing the excavation and supporting conditions by the special numerical modeling rested in final program 主要研究成果: ( 1 )建立使各个参数灵敏度值具有可比性的灵敏度计算公式,不仅得到了灵敏度分布规律,而且还得到了各参数对位移的量化影响结果; ( 2 )详细阐述了岩土工程仿真反演分析思路与具体方法; ( 3 )假定围岩为理想弹塑性模型,在可量测出理论上认为不可测的塑性变形、实现弹塑性位移分离的前提下,提出了弹塑性问题的分步反分析法。
Based on the idea of the measured displacement can be divided into elastic and plastic parts , elastic parameters can back analyzed by the elastic displacement , which is the measured instant after blasting excavation . the strength parameter can be got by plastic deformation , which is the measured during the period of construction loop without blasting excavation . lastly , depending on fenner formula , a new and valid evaluating criterion for tunnel stability is presented and the effect of deformation modulus , cohesion , internal friction angle and overburden can be considered 以解析理论为基础提出一种实用而简便的圆形洞室弹性反分析方法,且将其应用推广到其它洞型、分步位移等不同情况;提出一种围岩强度参数反演方法,并对其可靠性进行了初步研究; ( 4 )依据芬纳公式提出了能够考虑围岩变形模量、强度参数、埋深等主要因素的、新的、有效的围岩稳定性评判方法。
The seismic modeling algorithm includes in two key steps in which one is for calculating effective elastic parameters in a fractured and caved media by using elastic wave equation , the other is for wave extrapolating by using acoustic one - way wave equation based on an equivalent geology model consisting of those effective parameters 地震正演方法包含两个关键步骤,一是利用弹性波动方程计算含缝洞介质的有效弹性参数,另一步骤是根据有效弹性参数构成的等效地质模型,用单程声学波动方程进行波场延拓。
The methods were realized directly inversion of the possion ' s ratio from cdp gather and gas - bearing identify . by applied the late theory of avo technology , after inputting the p wave section and s wave section , the p wave and s wave impedance were obtained by applying simulate anneal inversion and used the log as a constrain condition , eventually , obtain the elastic parameter u and x by p and s impedance . then , the gas - bearing will be identified by u and x . by applying this method , the avo combination inversion of prestack and post were realized 利用上述的反演方法实现了泊松比从道集的直接反演,利用加权叠加技术实现了含油气的识别,并利用当今avo研究的最新成果,以加权叠加技术分离出的p波和s波剖面作为输入,在测井的约束下,采用模拟退火方法分别进行p波和s波波阻抗反演,通过p波和s波波阻抗来求取弹性参数和,再通过和的联合解释来进行含油气的判别,实现了avo的叠前叠后的联合反演。
The study demonstrated that linear visco - elastic parameters of rheological models built by theoretical modeling methods were constant while nonlinear visco - elastic parameters were not constant and changed as stress level changed and that visco - plastic parameters determined the shape of stress - strain curve 研究表明:运用模型理论建立的流变模型的线性粘弹性参数在低应力水平下是惟一的,但非线性粘弹性参数不惟一,并随应力水平的变化而变化,而粘塑性参数的大小决定了应力应变等时曲线的形状。
This thesis makes a new method to investigate and develop the mechanical properties from biomechanical opinion . the impress modulus which can be acquire from the analysis of nanoidentation load - displacement data could be input to the neural networks and the nine material elastic parameters can be output 本论文主要从生物力学的观点,利用神经网络的优势,研究拓宽获得材料机械性能的途径,通过分析纳米压痕试验的数据得到压痕模量,作为神经网络的输入,输出材料的九个弹性参数。