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首页> 外文会议>International Conference on Multiscale and Functionally Graded Materials >Health Monitoring for Reliability Testing of Metallic Sandwich Panels Using Integrated Active Sensing with Dual Actuator-Sensor Pairs and the Method of Virtual Forces to Identify Damage
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Health Monitoring for Reliability Testing of Metallic Sandwich Panels Using Integrated Active Sensing with Dual Actuator-Sensor Pairs and the Method of Virtual Forces to Identify Damage

机译：使用双动孔传感器对的集成主动传感器的金属夹层面板可靠性测试的健康监测及虚拟力方法来识别损伤

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摘要

A vibration-based health monitoring technique is implemented to detect simulated damage in a sandwich metallic honeycomb under combined acoustic and thermal loading. Two types of damage are introduced into a gamma titanium aluminide panel; simulated oxidation damage in the form of a local mass addition and simulated bolt damage with a change in bolt torque. An active sensing approach is used to measure frequency response functions between a piezo-stack actuator with force measurement and high-frequency accelerometers. The measured frequency response function matrix is then used to estimate the virtual force due to damage. Temperatures up to 300 °F and sound pressures up to 110 dB are considered. It is shown that the measurement of damage changes with combined loading. For example, temperature changes cause bolt damage to be more apparent in the virtual force due to the effects of temperature on the attachment boundary conditions and to the temperature gradient across the panel causing global bending. Similarly, acoustic loading is shown to enhance the detection of simulated mass damage due to larger motions produced on the panel.
机译：实施了基于振动的健康监测技术，以检测组合声和热负荷下的夹层金属蜂窝中的模拟损伤。将两种类型的损坏引入伽马钛铝化板中;模拟氧化损伤的局部大规模添加和模拟螺栓损伤，其具有螺栓扭矩的变化。有效感测方法用于测量压电堆叠致动器与力测量和高频加速度计之间的频率响应函数。然后使用测量的频率响应函数矩阵来估计由于损坏而估计虚拟力。考虑高达300°F和高达110 dB的耐压度高的温度。结果表明，损伤的测量随着加载组合的变化。例如，由于温度对附接边界条件的影响以及面板上的温度梯度导致全局弯曲的温度效果，温度变化导致螺栓损坏在虚拟力中更加明显。类似地，由于在面板上产生的较大运动，示出了声加载以增强模拟质量损坏的检测。

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