从位移模态出发详细推导了应变模态的表达式；
The expression of strain modal is derived in detail on the basis of displacement modal.
根据这一原理，运用应变模态数据可以检测出结构的损伤。
According to this principle, the structural damage can be identified using the strain modal datas.
研究了基于应变模态的钢结构构件焊缝损伤的自动识别方法。
The strain mode based approach to identify weld damage in members of steel structure automatically is demonstrated in present paper.
从而提出了应用应变模态折线图来估计梁结构上裂纹位置的方法。
So the strain modal broken line drawing method is presented for determning the location of the crack on a structure.
因此，本文提出了应用应变模态曲线尖峰突起来进行损伤定位的方法。
Therefore, in this thesis, the peak of strain mode curve diagram is used to locate damages.
提出并建立了损伤位置直接指标法、局域应变模态面积损伤程度直接指标法。
Based on strain mode shape (SMS), the direct index methods of damage location and degree detection are presented and founded.
梁的应力应变参数与其刚度存在直接关系，因而应变模态测量可望用于桥梁损伤检测。
The stress and strain parameters of girder have direct relationship with its stiffness. So the strain information of bridges can be applied to damage detection.
给出了悬臂梁应变模态的解析解 ，并在此基础上证明了其一阶应变模态的单调性 。
This paper deals with how to determine sturctural strain modes theoretically, and the proof for the monotony of the first order strain mode of a cantilever beam has been given.
振动测试中分别采用加速度传感器进行位移模态分析以及电阻应变片进行应变模态分析。
Acceleration sensor is used to test modal displacement, and strain sensors are used to test modal strain.
针对位移模态参数对结构损伤欠敏感，应用应变模态试验技术诊断结构损伤位置和程度。
Strain modal test is applied to diagnosing the position and degree of structural damage, in consideration of the displacement modal parameters being insensitive to damage.
应变模态参数和模式识别理论来源于机械工程领域，是在最近十来年才引入建筑结构中来的。
Strain mode parameter and mode identification theory originate from mechanical engineering territory. They are used to structure engineering lately.
应变模态具有对结构损伤敏感的特点，应用结构杆端应变模态，完全可以实现框架结构节点的损伤诊断。
The strain mode is sensitive to structural damage, and joint damages of framed structures can be diagnosed successfully using Element End strain mode shift.
本文基于应变模态的工作，利用应变模态识别得到的振型和频率结果，提出广义应变比能（GSED）的概念。
The paper gives a new concept generalized strain energy density (GSED). It is based on the strain mode frequency and mode shape. It is very effective and its physical meaning is clear.
本文主要采用神经网络方法，依据结构的应变模态理论，对钢结构构件的焊缝损伤的自动识别问题进行了综合的研究。
The approaches to identify and locate weld damage in members of steel structure are discussed by using strain mode in this paper.
分析了在惯性载荷作用下的弹性梁的应力及应变，并对弹性结构进行了模态分析。
Stress and strain of elastic beam under inertial load was analyzed, and modal analysis of elastic structure was figured out.
采用动态应变测试和试验模态分析法对QTZ80型塔式起重机进行振动测试和分析，并通过实验结论验证其理论分析的正确性。
Vibration measurement and analysis of QTZ80 tower crane is conducted through dynamic strain test and experimental mode analysis. The correctness of theoretical analysis has been proved by the results.
针对工程实践中常见的桥梁问题，建立了其在自由振动下的模型，分析了其前几阶振动模态下的振形和动态应变分布。
Aimed at popular bridge in the engineering, we build a piezoelectric bridge vibration model and analyze the vibration shape and distribution of the dynamic strain.
本文提出了基于模态应变能耗散率理论的一种新的结构损伤识别方法。
A new model_based method for structural damage detection, which is based on the theory of dissipation ratio of modal strain energy, is put forward.
其基本思想是：结构在承受动态载荷的作用时，其应变场可用所谓“固有的模态应变场”按某种比例的叠加来表达。
The basic idea is that the strain field response can be regard as a superposition of the so called strain modes multiplied by corresponding time-dependent modal coordinate.
在此基础上对基于模态应变能的损伤识别方法进行了深入探讨，并提出了基于模态应变能比变化率的损伤识别新指标。
We go deep into discussing the studies on structural damage detection based on modal strain energy, and propose a new damage detection index based on the change of modal strain energy ratio.
仿真结果表明，模态应变能比对结构损伤位置和损伤程度都比较敏感，是一种有效的损伤标识量。
The results of emulation indicate that damage features formed by mode strain energy ratio are feasible to identify the structure damage localization and damage severity.
基于模态应变能理论，得到能用于混凝土桥梁结构损伤的识别指标。
Based on the theory of modal strain energy, a damage index is deduced to identify the concrete bridge structure damage.
利用单元局部频率变化率法和单元模态应变能比法，对连续梁桥进行了损伤诊断的数值模拟研究。
Based on element local frequency change ratio method and element modal strain energy ratio method, numerical study is carried on to detect the damage of the bridge.
基于遗传神经网络与模态应变能，提出了一种斜裂缝两阶段诊断方法，识别梁体中斜裂缝的位置、角度和深度。
Based on genetic neural network and modal strain energy, a two-stage method for detecting diagonal cracks is proposed to identify the location, Angle and depth of diagonal cracks in beams.
应用模态应变能理论得到了能用于板类结构损伤的识别指标。
Based on the theory of modal strain energy, a damage index is deduced to identify the plate-like structure damage.
本论文结合基于模态应变能改变的损伤识别方法、随机有限元法、概率统计方法，得出一套基于模态应变能改变的损伤统计识别方法。
The thesis combines finite element method, modal strain energy of change, and statistic method, develops a sort of damage statistic identification method.
该方法将单元模态应变能分解为拉压、扭转和弯曲模态应变能，利用单元的主要模态应变能分量与结构固有频率的改变量对结构裂纹位置进行识别。
In the method the modal strain energy of an element is divided into tension modal strain energy, torsion modal strain energy and bending modal strain energy.
简述了理论计算振动参数的方法，重点介绍了模态应变能法。
Outlines the calculation method of vibration parameters, focusing on the modal strain energy method.
首先，应用有限元方法，基于曲率模态叠加原理计算曲率，进而计算应变、应力。
Firstly, with the curvature modal superposition method, the dynamic stress responses is calculated.
首先，应用有限元方法，基于曲率模态叠加原理计算曲率，进而计算应变、应力。
Firstly, with the curvature modal superposition method, the dynamic stress responses is calculated.
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