Because direct method , one of many kinds of back analysis methods , has broad applicability , direct method is adopted in this text 在各种反分析方法中,直接法具有很宽的适用范围。因此,本文采用直接法进行岩体参数的反分析。
The relation of safety factor of slope and displacement has been sinnilated by wematical model . accordin to basic theory of back analysis method 研究了天然土坡的稳定性安全系数,用非线性有限元模拟了边坡安全系数随位移场的变化而变化的数学模型。
2 . a back analysis method for multi - parameter identification of concrete is suggested ; it needs simple testing equipments only , costs little , and reduces the difficulty of test . 3 该方法所需设备简单,消耗成本少,同时也简化了试验的难度,给出的混凝土试块温度场解析解使得该方法更加简便。
The authors analyze and select landslide parameters by using back analysis method , and consult with the congeneric landslide to determine this landslide parameters , which can offers reference to design and construction department 用反分析方法对水井坪滑坡参数进行分析选择,并参照同类滑坡确定该滑坡的参数,为设计和施工单位提供依据。
In this paper , regularly back analysis methods " computational theories and steps are summarized and viewed , including conjugate gradient method , dfp method , simplex method . their merits and disadvantages are described , too 对常见的各种参数反分析方法共轭梯度法、 dfp法、单纯形反分析方法的计算理论、步骤进行了系统的总结和评述,并对各种方法的优缺点分别进行了阐述。
Two objects functions were deduced , which of the maximum likelihood method and the conventional bayes " method , with the application of principle of maximum entropy . under the information theory , more applications are provided to those back analysis methods 论文应用最大熵原理推导了最大似然法和传统贝叶斯法的准则函数,从信息论的角度为这两种反演分析方法的发展开拓了更广阔的应用空间。
2 . a back analysis method for parameter identification of materials is suggested and practiced combining analytic solutions or fem solutions with optimal mathematic method . an experiment of temperature field of a concrete block is made for a practical project , and the back analysis for unknown parameters is carried out successfully 研究了用解析解或有限元数值解结合数学优化理论进行反演分析的方法,并具体对某工程进行了立方体混凝土块温升实验,再用有限元对某些事先未知的材料参数进行了反演确定。
At the same time , monitored data in situ can be considered as dynamic serials related to time , and a dynamic back analysis method is tried to determine the seepage and mechanical parameters in fem analysis of the dynamic couple problem . on the basis of the above theories , universal computer codes are developed separately to deal with the static and dynamic parameter inverse problem . and a typical fractured rock slope case study is carried out 基于以上的研究理论,本文编制了渗流场与应力场静态、动态耦合三维有限元分析程序,并结合本文提出的混合遗传算法编制了相应的参数反演分析程序;典型裂隙岸坡工程算例验证了以上程序的正确性。
Using the soft of object - orient , powerbuilder , and dll theory , an object - oriented back analysis method was studied , which defined the relationship of object classes , established a message flow of finite element , and also made program of friendly interface and efficient operation 论文采用面向对象的软件powerbuilder作为开发平台,运用动态链接库的原理,建立了一套面向对象的反演分析法,定义了对象类之间的关系,确立了有限元的消息流,使程序的界面更加友好,程序操作更为直观。