Under this background , in this paper , a relationship between shear strength and shear wave velocity is built to estimate the characteristics of foundation soil with amount . the relationship is based on the non - linear elasticity of foundation soil and the theory of mohr - couloumb strength 在此背景下，本文寻找适合于软粘土地基的剪切波速度跟抗剪强度的关系式，该关系式是建立在土的非线性弹性模型和土的莫尔?库仑强度理论的基础上的。
The principle of the finite element method is introduced , and some expressions relating to transient dynamic analysis and transient heat transfer analysis are given . the transient dynamical characteristics of the structure are analyzed and the structure is checked according to the theory of intensity 介绍了有限元法求解过程,给出了瞬态动力学分析和瞬态传热分析的有限元公式,然后分析了结构的瞬态动力特性,采用强度理论对结构进行初步校核。
In this dissertation , the fact that the concepts of tangent modulus factor ( _ ( 1 ) , ) , proportional limit law ( pll ) and strength utilization ratio function ( surf ) in the combined theory of strength and stability ( ctss ) are the extension of concerned concepts in elastic mechanics is illustrated 本文说明了强度稳定综合理论中的切线模量因子、比例极限定律和强度利用率函数等概念是弹性力学有关概念的延伸，既可以用于强度理论，也可以用于稳定理论。
I . a mtil ( iaxial elastic - plastic hardening - sofling constitutive model of concrete is proposed iii order to offer a nonlinear material model of concrete for space restoring force analysis of reinforced concrete members taking into account the softening behavior of concrete . the concrete material model is incorporated the elastic - plastic hardening fracturing constitutive model of concrete with the plastic - fracturing theory of concrete , modified without defining two loading functiomis , and based on five parameter power function failure criterion proposed by guo zheng - hai etc from tsingliua ( jniversity , or three parameter unified strength theory proposed by yu mao - hong from x ian iiaotong university 1 、将砼弹塑性硬化断裂本构模型与塑性断裂理论结合起来，并加以改进，但无需定义两个加载面，以清华大学过镇海建议的五参数幂函数或以西安交通大学俞茂宏建议的，参数统一强度理论作为砼的强度破坏准则，建立了砼多轴弹塑性硬化松驰本构模型，能为钢筋砼构件空间恢复力分析提供砼非线性材料模型，并能反映砼材料的软化段。
Through the theory of light radiation and intensity , we can use the fewest leds to satisfy the luminous intensity demand . through image segmentation theory , we can accurately pick module up from the test stripe when it is put in wrong directions . through image processing theory , we can acquire correct information and avoid the bad effects from the asymmetric chemistry reaction and instability of the devices 用光的辐射和强度理论,我们计算出了获得足够图像强度所需的最少光源;用图像分割理论,我们在试纸条倾斜放置或有垂直方向上的偏移时,准确地提取出了各模块的数据;用平滑滤波和均值滤波理论,我们滤除了由于反应不均匀及硬件设备不稳定带来的噪声;用交遇区设计线性分类器的方法,我们降低了有限样本设计线性分类器带来的误差,提高了检验准确度。
Based on the strength design theory and the practical stress features of the drums and on the phenomenon that the drums produce the circumference stress along the drums under the binding force of the wire ropes and the bending stress along the axis , the paper proposes the fourth strength theory as the basis for the drum strength design 利用强度设计理论，结合卷筒实际受力特点，针对卷筒体在钢丝绳紧箍外压作用下产生沿卷筒径向、周向应力和轴向局部弯曲应力的情况，提出了以第四强度理论为依据的卷筒强度设计准则。
Firstly , the mechanism of the preparation of superfine quartz powder with ball mill is studied in this article , based on nature of quartz material , griffith ' s strength theory and the crush theory of planetary ball mill . the problem of granulation during the process of the preparation of superfine quartz powder is studied minutely . and proposed increasing dispersant and disperser medium to restrain granulation , and dispersing use ultrasonic after milled 首先,本文结合石英材料的基本物性,以格里菲斯强度理论和行星式球磨机的粉碎原理为基础,研究了球磨法制备超细石英粉体的机理,同时对粉石英制备过程中的团聚问题及其控制作了细致的研究,提出粉磨过程中增加分散剂和分散介质来抑制团聚,粉磨后采用超声法进行分散,并确定了最佳分散剂、分散介质的用量和最佳超声分散时间。
Basing on compressive mechanism and main factors that impact compressive strength , the compressive strength formulas of block masonry are establish , using stress and strain method respectively ; basing on mechanism of shear and main factors that impact shear strength , the shearing strength formulas of block masonry are set up , introducing hoffman rule and the twin shear strength theory method respectively 依据受压工作机理和影响砌块砌体抗压强度的主要因素,分别用应力法和应变法建立了砌块砌体抗压强度公式;依据受剪工作机理和影响砌块砌体抗剪强度的主要因素,用hoffman准则和双剪强度理论分别提出了砌块砌体抗剪强度公式。
Using theory of structure intensity and prestressed concrete bridge , this paper reviews theoretical computing method of stress and deflection . making use of the procedure of computing bridge structure , the structure of simply supported - continuous system is calculated and the result is analyzed , the character on force and deflection is generalized in the paper 运用力学理论、混凝土结构强度理论和桥梁结构相关理论论述了桥梁应力与变形的理论计算方法；利用专用桥梁结构计算程序结合具体工程项目中的简支转预应力连续结构进行了数值模拟计算，并对计算结果进行理论分析，提出这种结构型式在受力状态与结构变形上的特点。
The quality of machine with loading and unloading bushing has been improved and the structure of which has been turned rationalization ; fourthly , according to the relation of the tight fitting between resist grind bushing and suspension yoke , making use of the two simple thick circles theory in the elastic - plastic mechanics and the fourth strength theory , it integrated theory with it ' s formulation characteristic and developed the solver of the tight fitting force in the system of c + + builder . it could realize the solve of all tight fit force and save up the frame ' s size and the tight fitting ' s data in database in order to use in the future ? the assemble force of tight fitting can be used as the rule of estimating loose or tight bushing in theory 3 ) 、利用了ansys8 . 0自带的opt (优化技术)对c型夹具进行了结构上的优化，实现了一定强度和刚度的条件下， c型夹具的质量最小，使装、退套机的质量得到了改善，结构更趋于合理化； 4 ) 、根据合金套和吊耳的过盈配合关系，应用弹塑性力学中的两个简单厚臂圆筒理论及第四强度理论，结合轴套装配方案特性，在c + + builder平台上开发出了过盈配合装配力的求解器，它能求解出所有过盈配合所需装配力，并将各种配合尺寸和过盈量的数据库存化，以便将来调用。
