The error analysis proves that this method can realize the exact identification of the structure boundary support stiffness if the modal test results are of enough accuracy.
误差分析表明，如果模态试验结果具有足够的精度，用本文方法能够准确地实现结构边界支承刚度识别。
The test and analysis about intension and stiffness of airplane structure is a important part of airplane design.
飞机结构强度和刚度的试验与分析研究是飞机设计的重要环节。
A fatigue life calculation and test was performed to investigate the influence of use of different-stiffness fasteners on structure fatigue life in repair area.
本文通过疲劳寿命计算和试验，研究了结构连接部位的紧固件剪切刚度不同，对疲劳寿命的影响。
The results show that the method can identify the stiffness parameters of frame structure accurately and has a good fault tolerance. The method has certain application value in structure dynamic test.
结果表明，该方法能较准确地识别结构的刚度参数，具有良好的容错性，在结构动力检测方面具有一定的应用价值。
Structure of the mount model is modified, and stiffness measurement and fatigue durability test were made to the test piece before and after the modification.
对悬置模型进行结构改进，并对改进前、后的试件进行了刚度测量试验和疲劳寿命试验。
Finally, the damping characteristics of them were tested. Test results showed that by adding a thin damping layer, the damping of structure was increased nearly without stiffness changed.
然后测试其阻尼性能，结果表明嵌入较薄阻尼层会在构件刚度改变不大的情况下增大试样的阻尼。
The test results show that: the above two steel bracing-retrofitting methods can improve the lateral stiffness and energy-dissipating capacity of the existing frame structure effectively;
试验表明，两种支撑加固方法都能显著提高结构的抗侧刚度，有效改善结构的耗能能力；
The test results show that: the above two steel bracing-retrofitting methods can improve the lateral stiffness and energy-dissipating capacity of the existing frame structure effectively;
试验表明，两种支撑加固方法都能显著提高结构的抗侧刚度，有效改善结构的耗能能力；
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