An Approach for Estimating the Effect of Transient Sweep Through a Resonance

Author:

Hackenberg Hans-Peter1,Hartung Andreas1

Affiliation:

1. MTU Aero Engines AG, Munich 80995, Germany e-mail:

Abstract

The difference of a stationary forced response situation of a turbine or compressor blade relative to a transient resonance sweep is well known and documented in the literature. Different approaches have been used to understand the effect on transient amplitude in comparison with forced response. The dependencies on damping levels and resonance passage speed have been noted. Estimates for a critical or/and maximum sweep velocity have been given. The understanding of transient response during resonance sweep is of practical importance for instance when running a certification stress test for an aircraft engine, where it needs to be decided upfront which acceleration rate (increase in rpm per second) to use to ensure that the maximum airfoil response that could be attained under stationary condition is being measured with sufficient precision. A second reason for understanding of transient response is the verification of correct, if relevant lower, component life usage during transient regimes in operation. This paper gives a proposal for a simple 1D method based on one degree-of-freedom (1DOF) system considerations for estimating the transient response dependency on the sweep velocity, damping levels, and resonance frequency. The method is verified with 3D analyses of more complex blade–disk structures, which have been validated with air jet excitation rig and aero-engine tests. Using the results of the 1DOF analysis, an estimate of the expected stationary resonance response increase can be formulated even in cases where the measured data are based on a significant deviation from the desired sweep velocity, where transient effects would be significant.

Publisher

ASME International

Subject

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

Reference12 articles.

1. Vibration and Shock—Experimental Determination of Mechanical Mobility—Part 2: Measurements Using Single-Point Translation Excitation With an Attached Vibration Exciter;ISO,2015

2. Vibration During Acceleration Through a Critical Speed;ASME J. Appl. Mech.,1932

3. Näherungsverfahren zur Bestimmung der beim Durchfahren der Resonanz auftretenden Höchstamplitude;Motortech. Z.,1949

4. Analytically Based Estimation of the Maximum Amplitude During Passage Through Resonance;Int. J. Solids Struct.,2001

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