Ultrasonic assessment of Young's modulus in cast iron pipes

铸铁管杨氏模量的超声评估

基本信息

批准号：
522467-2018
负责人：
Cascante, Giovanni
金额：
$ 1.78万
依托单位：
University of Waterloo
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2018
资助国家：
加拿大
起止时间：
2018-01-01 至 2019-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=646946
关键词：
Ultrasonic assessment Young modulus cast

项目摘要

Cast iron pipes have been used for almost two centuries in water and gas distribution systems. Their deterioration results in loss of**strength; which compromises the reliability of the network. The current technology for wall thickness evaluation relies on the use of**an accurate value of the Youngs modulus of the pipeline section. We have developed a novel laser-based system that makes it**possible, for the first time, to actually see and quantify the ultrasonic wave field in the transducers and the materials they excite.**This innovative technology can show how ultrasonic waves are generated, propagated, and attenuated in pipelines; so that the**elastic modulus can be reliably evaluated. The main goal of this research program is aimed at addressing the current lack of**reliability of acoustic and ultrasonic testing for the evaluation of the pipe wall thickness. We will start at the root of the problem:**proper characterization of the acoustic and ultrasonic sensors. Currently, wave velocity (elastic modulus) is computed using**practically only one data point out of thousands that are recorded in typical ultrasonic tests. Because the response of ultrasonic**sensors is not the constant for the same input excitation at different frequencies. However, the real responses are fundamental to**develop reliable ultrasonic methods. We will evaluate the real response of pipelines using laser technologies to develop new**techniques that will make the Canadian industry more competitive. Our solution will be based on a robust analytical, experimental,**and numerical programm.

铸铁管已在水和气体分配系统中使用了近两个世纪。它们的恶化导致**力量的损失；这损害了网络的可靠性。当前用于壁厚厚度评估的技术依赖于** Youngs Modulus of Pipeline部分的准确值。我们已经开发了一种新型的基于激光的系统，使其首次看到并量化了传感器中的超声波领域及其兴奋的材料。因此，可以可靠地评估**弹性模量。该研究计划的主要目的是解决目前缺乏声学和超声测试的可靠性来评估管道壁厚。我们将从问题的根源开始：**正确表征声学和超声传感器。当前，使用**实际上仅指出了典型超声测试中记录的数千个数据，而波速（弹性模量）实际上仅指出了一个数据。因为在不同频率下，超声**传感器的响应不是相同输入激发的常数。但是，真正的响应是**开发可靠的超声波方法的基础。我们将使用激光技术评估管道的真实响应，以开发新的**技术，从而使加拿大行业更具竞争力。我们的解决方案将基于强大的分析，实验性**和数值程序。