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.

铸铁管在供水和燃气分配系统中的使用已近两个世纪。它们的恶化会导致**力量的丧失；这会损害网络的可靠性。当前的壁厚评估技术依赖于使用**管道截面杨氏模量的准确值。我们开发了一种新颖的基于激光的系统，首次能够实际观察和量化换能器及其激发的材料中的超声波场。**这项创新技术可以展示超声波是如何产生的。在管道中产生、传播和衰减；从而可以可靠地评估**弹性模量。该研究计划的主要目标是解决目前声学和超声波测试评估管壁厚度缺乏**可靠性的问题。我们将从问题的根源开始：**声学和超声波传感器的正确表征。目前，波速（弹性模量）的计算实际上仅使用典型超声波测试中记录的数千个数据点中的一个。因为对于不同频率下的相同输入激励，超声波**传感器的响应不是恒定的。然而，真实的响应对于**开发可靠的超声波方法至关重要。我们将评估使用激光技术的管道的真实响应，以开发新的**技术，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、**和数值程序。