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损伤指标
相关语句
  “损伤指标”译为未确定词的双语例句
    Study on Indices of the Damage Location on the Concrete Arch Dam
    损伤指标法用于混凝土拱坝损伤位置识别的研究
短句来源
    This thesis mainly probes into the applicability of various damage indices to the dam when there is any damage (for example a crack).
    本文主要探讨当混凝土大坝出现损伤时(如裂缝),各种损伤指标法对混凝土大坝的适用性。
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  damage index
A damage index, used to identify possible locations and corresponding severities of local damage, is defined and expressed in terms of modal displacements that are obtained numerically from mode shapes of the undamaged and the damaged structures.
      
Based on a small damage assumption, a damage index equation is revealedn the context of elasticity.
      
It turns out that the resulting damage index equation inherently suffers from singularities near inflection nodes.
      
With the aid of the singular value decomposition technique, the solution to the damage index equation is achieved in the Haar wavelet space.
      
Next, the physical desired solution to the damage index equation is reconstructed from the one in the wavelet space.
      
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Based on the theory of BP neural networks,the thesis introduces a method to detect the damage indexes of gate through application of neural networks.It is combined with an engineering example to expound the actual course of realization of the damage detection using neural network method,and the result shows that it is a feasible method to apply neural networks to the damage detection of gate.

基于BP神经网络原理,介绍了神经网络用于闸门损伤检测中损伤指标的获取方法,并结合工程实例,阐述了神经网络用于闸门损伤检测的实现过程。事例说明,神经网络用于闸门的损伤检测是一种行之有效的方法。

Firstly,the damaged areas were approximately localized by the damage index of the measured degree of freedom;secondly,the damaged members were located and quantitatively evaluated by the sequential quadratic programming and least-square method in the selected areas,and the results were compared.According to the simulation results,only a few low modes and limited measurements of degree of freedom were needed for the algorithm to diagnose damage for the offshore platform.

首先利用测量自由度正则化损伤指标向量得到损伤的大致区域;其次,在选定的区域内分别采用序列二次规划算法和最小二乘法来诊断损伤构件及其损伤程度,并对其结果进行了比较。数值模拟表明,仅需少量低阶模态和部分测量自由度,上述损伤诊断算法便可完成海洋平台的损伤诊断。

 
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