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Enclosure Noise Source Evaluation Based on Beamforming and Transfer Path Analysis
CHENG Jian;SUN Jie;LIU Bin;HUANG Zhen-yu
   2011, 31 (4): 119-124.   DOI: 10.3969/j.issn.1006-1355-2011.04.028
Abstract （1757）            Save
Noise source evaluation for enclosure noise control is a difficult problem due to the large amount of noise sources involved in the complicated acoustic field. In this paper, an enclosure noise source evaluation method is presented. This method mainly includes four steps: (1) dividing the enclosure space into several sub-spaces according to the potential source positions; (2) applying the beamforming method in terms of the measured A-weighting sound pressure level in each sub-space to find the significant sources;(3) computing the contribution of each significant source to the target position by the transfer path analysis (TPA), and (4) employing an error analysis of the calculated noise to verify the noise evaluation. The simulation results show that this approach can reduce the reverberation influence and TPA work. Therefore, it is a good approach for the evaluation of the enclosure noise sources
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《Vibration Analysis and Control for Pipelines of Reciprocating Compressors》
HUANG Hong-jun;HUANG Tie-jun;CHEN Zhao-hui;LI Lian-chao;CHENG Jian
   2010, 30 (3): 21-22.   DOI: 10.3969/j.issn.1006-355.2010.03.006
Abstract （2671）      PDF（pc） （102KB）（1333）       Save
The strong vibration problem of the outlet pipelines of the reciprocating compressor group of Yaha oil gathering station is investigated. Employing the PAP software developed by Xian Jiaotong University, a practical and effective model of the pipeline system is established. The natural frequencies of the outlet pipelines, the natural frequencies of the gas system in the pipes, and the pulsation of the gas flow are calculated, and the cause of vibration is found. According to the results of computation, a practical scheme is presented to control the system vibration. The vibration of the pipeline system is reduced significantly.
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