• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>European-American Workshop on Reliability of NDE >Characterizing the Performance of Lamb Wave Based SHM Systems – A Two-Step Approach Based on Simulation-Supported POD and Reliability Aspects
【24h】

Characterizing the Performance of Lamb Wave Based SHM Systems – A Two-Step Approach Based on Simulation-Supported POD and Reliability Aspects

机译：表征兰姆波的SHM系统性能 - 一种基于仿真支持的荚的两步方法和可靠性方面

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The performance of conventional NDE systems with one or a few sensors can be adequately described by classical POD concepts. In the case of Lamb wave based structural health monitoring (SHM) the situation is more complex. In SHM a larger number of permanently installed sensors arranged in a network configuration are often used. For this problem the conventional POD concept needs to be adapted since POD becomes a function of position or more general, a function of the specific network configuration. Moreover, the long-term behavior of sensors and electronics plays an important role since their degradation directly affects the POD of the SHM system over time. In the present paper a two-step approach to characterize the performance of Lamb wave based SHM systems based on POD and reliability aspects is presented. In a first step we introduce a new POD concept for Lamb wave based sensor networks where the effective network aperture is used as a virtual scanning device. Therefore the conventional POD methods already known from classical UT can be directly transferred to SHM. The only exception is the location-dependent POD determined by the specific network configuration. For this purpose a simulation platform is presented that allows the calculation of location-dependent POD values and additionally offers the possibility to optimize the network configuration if the statistical distribution of flaws is empirically known. In a second step we address the age-dependent performance of sensors and electronics by presenting results of an extensive experimental and simulation-supported reliability study on CFRP integrated sensor systems. Environmental tests have been done to investigate the reliability of ultrasonic transducers and electronic components in the long-term. The tested sensor package concept has been specifically designed with respect to functionality (high efficiency of Lamb wave coupling) and reliability of hardware components. We discuss how these aspects can be incorporated in the classical POD framework. As a final result for the description of SHM system reliability we propose a time-dependent or age-related POD, i.e. a POD time curve, rather than a single POD value.
机译：传统NDE系统的性能与一个或多个传感器可以通过古典豆荚概念得到充分描述。在基于LAMB波的结构健康监测（SHM）的情况下，情况更复杂。在SHM中，通常使用在网络配置中布置的更多数量的永久安装的传感器。对于该问题，需要适应传统的POD概念，因为POD成为位置或更一般的函数，特定网络配置的函数。此外，传感器和电子器件的长期行为起着重要作用，因为它们随着时间的推移直接影响SHM系统的豆荚。在本文中，介绍了一种两步方法，表征了基于POD和可靠性方面的基于LAMB波的SHM系统性能的方法。在第一步中，我们向基于LAMB波的传感器网络引入新的POD概念，其中有效网络孔用作虚拟扫描装置。因此，从经典UT中已知的传统POD方法可以直接转移到SHM。唯一的例外是由特定网络配置确定的位置依赖性窗口。为此目的，提出了一种仿真平台，其允许计算位置相关的POD值，并且如果缺陷的统计分布是已知的，则可以提供优化网络配置的可能性。在第二步中，我们通过在CFRP集成传感器系统上提出广泛的实验和模拟支持的可靠性研究来解决传感器和电子设备的年龄依赖性性能。已经完成了环境测试来调查长期超声换能器和电子元件的可靠性。已经专门设计了测试的传感器封装概念，专门针对功能（LAMB波耦合的高效率）和硬件组件的可靠性设计。我们讨论这些方面如何包含在古典豆荚框架中。作为SHM系统可靠性描述的最终结果，我们提出了一个时间依赖或年龄相关的POD，即POD时间曲线，而不是单个POD值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号