In this dissertation , a new one - dimensional elastic viscoplastic consolidation model is established based on the analytic result of consolidation of the structured soft clay , and by using this model , the consolidation behavior of the natural clay and disturbed clay are analyzed systematically 本文以天然土固结压缩试验研究成果为基础，建立了一个结构性土的一维弹粘塑性固结模型，并通过该模型对天然土、扰动土的固结性状进行系统、全面的分析研究。
During the temperature fields , the results indicate that the processing parameters such as the extrusion velocity , casting temperature , perform preheating temperature , die preheating temperature and so on are important for the temperature fields besides the dwell time . they are must be in concordance each other to the deforming zone is in the quasi - solid state , and the stable semi - solid extrusion is implemented . during the deforming fields , the hyperbolic sine thermo - rigid - viscoplastic fem model is selected according to the forming feature of the process , and the variations of the stress - strain fields are studied 在温度场的模拟中，模拟结果表明，保压时间是影响制件成形质量的关键因素之一，挤压速度、液态金属浇注温度、预制体预热温度和模具预热温度等工艺参数对温度场的影响也很大，需进行参数之间的协调，只有当变形区内部始终维持准固态时，才能实现稳定的液-固挤压成形过程；在变形场的模拟中，根据液态浸渗挤压的成形特征，选用了双曲正弦刚-粘塑性有限元计算模型，研究了变形过程中应力应变场的变化规律，研究了模角对变形和金属流动的影响及变形力的变化过程和其影响因素。
The thesis introduces the general engine development , domestic and foreign , analyses the present situation and future development trend of environment friendly lubricants , studies on theories of flow activation and low - temperature jellification which well illustrate the low - temperature property of environment friendly lubricants , researches the low - temperature flowability of environment friendly lubricants in perspective of molecule , then theoretically synthesizes plastic and flow principles of environment friendly lubricants and finally reaches a ground to explain low - temperature properties of environment friendly lubricants 本文论述了国内外内燃机油的发展概况，分析了环境兼容润滑油的发展现状及趋势，研究了可以用于解释环境兼容润滑油低温性能的流动活化理论和低温成胶理论，从分子的角度研究了环境兼容润滑油低温流变特性，对润滑油的粘塑性流变机理进行了理论推导，找出了解释环境兼容润滑油低温流变特性的根据。
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 为进一步发展和完善基础隔震结构分析理论和计算方法，本文以隔震系统恢复力模型研究及基础隔震结构非线性地震反应分析为基础，对基础隔震结构的多维地震反应及平?扭耦联地震反应开展了以下几方面的研究工作：根据隔震系统力学性能的特点，在现有研究成果的基础上，对隔震系统恢复力计算模型进行了改进和创新，提出了普通叠层橡胶支座单向及双向耦合粘弹性恢复力计算模型，铅芯叠层橡胶支座单向及双向耦合粘弹塑性微分型恢复力计算模型，摩擦滑动支座单向及双向耦合修正粘塑性微分型恢复力计算模型。
In this article , we introducte the advanced numerical , analysis method - finite element method and lucubrate the rigid - viscoplasticity basic theory for three - dimensional problem with the metal ' s specific feature of the warm extrusion forming process , the analytical procedure of metal ductility forming process and the rigid - viscoplasticity finite element method ' basic theory . the rigid - viscoplasticity ' s modle has been made and the rigid - viscoplasticity ' s modle finite element columnwise based on the lagrange facil method and overtension overtress has been deducted in this paper . at the same time , we have analytic studied the forming technique process for the sway oil pump stator 本论文采用先进的数值分析方法? ?有限元法，结合金属在温挤压成形过程的具体特点，详细论述了三维问题的刚粘塑性有限元法，介绍了金属塑性成形过程的分析方法，以及刚-粘塑性有限元法的基本理论，建立了刚-粘塑性模形，推导了基于lagrange乘子法和过应力模形的刚粘塑性有限元列式，并对转向油泵定子的成形工艺过程进行了研究分析。
By means of the finite element inverse analysis , based on stress - strain theoretical equations of the elastoplasticity and viscoelasticity - viscoplasticity , the change of the valley - side margin stress distribution during original state , the condition of human cutting a terrace of building houses in the loess slope , and the condition of cutting the top of loess slope is elucidated 3 .基于粘弹?粘塑性理论的本构方程，运用有限元方法进行反演分析，阐明了宅基边坡谷缘在天然条件、斩坡建窑条件下和削坡条件下的应力场变化特点。结果表明，谷缘在斩坡建窑条件下拉张应力和剪切应力增大是导致崩塌产生的根本原因。
Using least squar method , the parameters of the new model can be ascertained , by calculating an engineering using fem programme , an encouraging phenomenon appeared that the calculating result is more close to the spot value than other models are , so it is clear that the new model is good for applying , worthing for more extensive use 本文在粘弹、粘塑性本构模型辨识的基础上，结合实验室流变资料，建立新的本构模型，采用最小二乘法进行参数拟合。通过有限元对某工程进行计算，结果显示，采用新建模型计算与实测值较吻合，说明模型合理，值得推广。
By using the constitutive model , we can establish the creep and consolidation model , the variation trend of super pore water pressure and the development of viscoelastic settlement and viscoplastic settlement . at last forecasting the long term creep settlement in the metallurgy industrial estate at the backward position of haihe river in tianjin 并利用此本构关系建立蠕变与固结模型，计算出土层在大面积填土作用下超静水压力发展趋势，同时得出其粘弹性、粘塑性沉降发展趋势，最后对冶金工业区软土长期蠕变沉降作出预测。
Abstract : in this paper , rigid visco - plastic fem technique is applied to numerically analyze the factors affecting the forming time of superplastic bulging , and the regularities of forming time affected by different factors are given by examples of constant pressure and constant strain rate die - bulging of cylinder parts , all of which provides guideline for process planning in actual superplastic bulging 文摘:采用刚粘塑性有限元技术对超塑性胀形成形时间的影响因素进行了数值分析，以圆筒形零件的恒压和恒应变速率充模胀形为例，给出了不同因素对超塑性成形时间的影响规律，为超塑性胀形实际工艺设计提供了依据。
According to the practical geological model of slope , by means of the finite element analysis , from the constitutive equations of the elastoplasticity and the viscoelasticity - viscoplasticity , the process and mechanism for progressive failure of the locked segment of rockmass are quantitatively revealed and simulated during the rupture , deformation , destruction , and failure of highsteep slope rockmass , and the dynamics driving the motion of rocky landslide with violent starting velocity by high pressure water flow is dealed with 根据边坡实际地质模型，基于弹塑性与粘弹-粘塑性理论的本构方程，通过有限元模拟分析，定量地揭示和模拟再现了高边坡岩体破裂、变形、破坏及失稳前后锁固段岩体渐进性破坏的机制和过程，探讨了高压水流作用下滑坡启程剧动的破坏机理。
