Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals
The low-frequency vibration of the bucket wheel excavator has an important impact on the fatigue life of the structures. For conventional vibration testing methods, it is difficult and expensive to excite the overall low-frequency vibration of the whole machine. Hence, in this paper, the excitation...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2018-01-01
|
Series: | Shock and Vibration |
Online Access: | http://dx.doi.org/10.1155/2018/6182156 |
id |
doaj-96242c47f2a3406b99cb894f07a15958 |
---|---|
record_format |
Article |
spelling |
doaj-96242c47f2a3406b99cb894f07a159582020-11-25T00:44:22ZengHindawi LimitedShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/61821566182156Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay SignalsY. Z. Jiang0C. J. Liu1X. J. Li2K. F. He3D. M. Xiao4Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, ChinaHunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, ChinaHunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, ChinaHunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, ChinaHunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, ChinaThe low-frequency vibration of the bucket wheel excavator has an important impact on the fatigue life of the structures. For conventional vibration testing methods, it is difficult and expensive to excite the overall low-frequency vibration of the whole machine. Hence, in this paper, the excitation method that uses the belt-supporting rollers on the boom as an exciter is tried to excite the low-frequency vibration, so that the low natural frequencies can be identified by Fourier transforming the free decay signals caused by the sudden power off. By this method, the first five natural frequencies are obtained, and the results are verified through corresponding computational numerical model of the bucket wheel excavator. It can be concluded that the proposed testing method can achieve the same accuracy but is much more convenient and costs less than existing methods.http://dx.doi.org/10.1155/2018/6182156 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Y. Z. Jiang C. J. Liu X. J. Li K. F. He D. M. Xiao |
spellingShingle |
Y. Z. Jiang C. J. Liu X. J. Li K. F. He D. M. Xiao Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals Shock and Vibration |
author_facet |
Y. Z. Jiang C. J. Liu X. J. Li K. F. He D. M. Xiao |
author_sort |
Y. Z. Jiang |
title |
Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals |
title_short |
Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals |
title_full |
Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals |
title_fullStr |
Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals |
title_full_unstemmed |
Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals |
title_sort |
low-frequency vibration testing of huge bucket wheel excavator based on step-decay signals |
publisher |
Hindawi Limited |
series |
Shock and Vibration |
issn |
1070-9622 1875-9203 |
publishDate |
2018-01-01 |
description |
The low-frequency vibration of the bucket wheel excavator has an important impact on the fatigue life of the structures. For conventional vibration testing methods, it is difficult and expensive to excite the overall low-frequency vibration of the whole machine. Hence, in this paper, the excitation method that uses the belt-supporting rollers on the boom as an exciter is tried to excite the low-frequency vibration, so that the low natural frequencies can be identified by Fourier transforming the free decay signals caused by the sudden power off. By this method, the first five natural frequencies are obtained, and the results are verified through corresponding computational numerical model of the bucket wheel excavator. It can be concluded that the proposed testing method can achieve the same accuracy but is much more convenient and costs less than existing methods. |
url |
http://dx.doi.org/10.1155/2018/6182156 |
work_keys_str_mv |
AT yzjiang lowfrequencyvibrationtestingofhugebucketwheelexcavatorbasedonstepdecaysignals AT cjliu lowfrequencyvibrationtestingofhugebucketwheelexcavatorbasedonstepdecaysignals AT xjli lowfrequencyvibrationtestingofhugebucketwheelexcavatorbasedonstepdecaysignals AT kfhe lowfrequencyvibrationtestingofhugebucketwheelexcavatorbasedonstepdecaysignals AT dmxiao lowfrequencyvibrationtestingofhugebucketwheelexcavatorbasedonstepdecaysignals |
_version_ |
1725274725523914752 |