A New Technique for Identifying Synchronous Resonances Using Tip-Timing

Author:

Heath Steve1

Affiliation:

1. Electronic and Measurement Technology Department, Rolls Royce plc, PO Box 31, Derby DE24 8BJ, UK

Abstract

Non-contact measurement of vibration at turbomachinery rotor blade tips using blade tip-timing has become an industry-standard procedure. Current research focuses on analysis methods for interpretation of the measured vibration data from a limited number of probes. The methods are classified by the form of the vibration they can identify. Identification of asynchronous response amplitude and frequency is well documented. Whilst a method for identifying maximum synchronous resonance amplitude has existed since the early 1970s, there is no published evidence of a method for directly identifying frequency or engine order using a small number of probes. This paper presents a new analysis method for identifying synchronous resonance engine order using two tip-timing vibration measurements. The measurements are made at different locations on the turbomachinery casing using a minimum of two probes. A detailed description of the method and results from its practical application are given. The potential of the method to identify the amplitude and frequency of close modes, not possible with current methods, is demonstrated. The effect of blade mistuning on the accuracy of the method is investigated. Existing synchronous response analysis methods and the new method presented here give the response amplitude and frequency after the resonance has been traversed. Real-time identification of synchronous response amplitude and frequency would allow tip-timing to be used as a safety monitor of all blades. Real-time methods, their limitations and practical application are discussed. The future use of tip-timing as the dominant vibration measurement system is discussed with reference to experience on measurements made solely with tip-timing on assemblies with undefined vibration characteristics. [S0742-4795(00)02602-8]

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Reference7 articles.

Cited by 74 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3