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结构边界
    Structural Boundary Conditions Recognition and Damage Diagnosis Based on Neural Networks
    基于神经网络的结构边界条件识别和损伤诊断
    In the environment vibration experiment, the encountered engineering problem is that the test clamp which supports the structure should reflect or simulate the dynamic characteristics provided by real boundary conditions of the structure, which is a dynamic design or dynamic simulation of structural boundary.
    进行坏境振动试验,需要试验夹具能够反映或模拟实际结构的动力学边界条件,是一个结构动力学边界设计问题。 本文针对结构动力学边界条件的识别和结构边界的动力学设计,开展结构边界动力学条件的时域识别方法和有固有频率和振型要求的结构边界条件动力学设计研究,并将着重于通过工程上可实现的结构模拟真实结构提供给实际结构的动力学边界。
    The theory and the procedure for calculating the loading stresses in single layered and double layered plain concrete pavements, treatment of vehicle loading and structural boundary condition, regression of results of finite element calculation, rectification of theoretical solution and determining procedure of comprehensive coefficients adopted in newly issued Specifications of Cement Concrete Pavement Design for highway are introduced in this paper
    介绍新《公路水泥混凝土路面设计规范》中普通混凝土路面结构 (单层和双层 )的荷载应力计算理论和方法 ,车辆荷载和结构边界条件的处理 ,有限元计算结果的回归 ,理论解的修正 ,以及综合系数的确定方法
    Structural boundary status can be judged by the structure damping ratio change.
    通过实测桥梁结构阻尼比的变化,可以对结构边界条件、结构材料阻尼特性的改变进行分析判断。
    At the basis of pointing out the phenomena of sloping surface moving when the loading, structural boundary or hydrology and geology conditions changes, the dynamic stability analysis to considering the moving of sloping surface is putted forwarded.
    在指出最不利滑动面会在荷载、结构边界、水文地质条件等发生变化时发生迁移现象的基础上,提出了基于最不利滑移面迁移的稳定性动态分析方法。
    For these situations, a time domain method of the identification of boundary conditions, approaches for dynamic design of structural boundary are developed and investigated in this dissertation.
    本论文主要从以下六个方面对结构边界条件设计与工程实现作系统的研究。
    A speedy accurate solution to structural fuzzy finite element equilibriumequations (SFFEEE), by combining the definition of the solution of intervalequations with the mechanical meaning of the structural finite element equilibrium equations (SFEEE),,was put forward. The fuzzification of the SFFEEE,which is discussed in this paper, originates from that of materical property,structural boundary conditions and external loading. The computing quantity ofthis solution is almost equal to that of the general finite element method(GFEM ).
    本文将区间数方程组解的定义与结构有限元平衡方程的力学意义结合起来,针对由于材料性能的模糊性、结构边界条件的模糊性和载荷的模糊性而得到的模糊有限元平衡方程组.提出了一种快速而准确的解法,其计算量与普通有限元法几乎相等.
    Structural boundary conditions recognition and damage diagnosis are of important practical value for the studies of strutural dynamic properties in laboratory. This paper presents a kind of partition combination neural network model based on subnets. Structural boundary conditions recognition and damage diagnosis are realized by the use of static deflections of reinforced concrete beam as characteristic factors.
    结构边界条件识别和损伤诊断,对于实验室条件下研究结构的动力特性具有重要的实用价值.本文提出了以子网为基础的分区组合式神经网络模型,并以钢筋混凝土梁在静力作用下的挠度作为特征参数,实现了结构的边界条件识别和损伤诊断.
    First, based on the transformational method of sentence patterns, the Laws of Holograph, Structural Boundary and Transformational Conservation, and the traditional grammar theory, we can infer that the inversion in the sentence "It was so windy that it was only with a tremendous effort were we able to pitch a tent" should not have occurred and it has to be adjusted to its normal order.
    其一 ,“Itwassowindythatitwasonlywithatremendouseffortwereweabletopitchatent”一句中的倒装 ,采取句型转换的方法 ,运用全息律、结构边界律、转换守恒律等规律 ,依据传统语法学说 ,可推断并说明该句中的倒装不仅绝无必要而且应调整为正序。
    Through analysis and comparison of various samples,the relationship among the structural boundary,geometrical de - fective change and structural stability is established and the effectiveness of the analysis method of stability and its applicability to service bulk carrier is verified.
    通过不同类型的算例进行分析比较,总结出船舶结构边界条件、几何缺陷变化与船舶结构稳定性之间关系,验证了本文稳定性分析方法的正确性、有效性及对现役散货船船体结构的适用性。
    In order to research into initial latent causes of roof damage for some Grotto No. 4, the viscoelastic thin plate theory is used for setting up analytical solution of viscoelastic deformation and stress for the generalized Kelvin model, based on the laws of deformation and damage and structural boundary conditions for Grotto No.
    为了探讨导致某石窟4号硐顶板破坏的最初潜在原因,根据石窟变形破坏规律及结构边界条件,采用粘弹性薄板理论,给出了广义开尔文模型下岩层的粘弹性变形、应力解析解。
    Structural boundary is implicitly embedded in the level set function with a higher dimension as the zero-level set. Hamilton-Jacobi equation is applied to dominate the dynamic evolvement for the embedded level set function and further to control the movement of structural boundary with the flexibility of handing topology changes.
    该方法将结构的边界隐式地嵌入到一个高一维标量函数的零水平集模型中,通过一个Hamilton-Jacobi类型的偏微分方程来控制水平集函数的动态运动,从而间接地实现结构边界拓扑和形状的动态演化.
 

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