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...

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Main Authors:	Y. Z. Jiang, C. J. Liu, X. J. Li, K. F. He, D. M. Xiao
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
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Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals

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