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Application of Transfer Path Analysis in Structure Design
LIU Rui-feng;ZHOU Pu;WANG Qiang
   2012, 32 (4): 16-19.   DOI: 10.3969/j.issn.1006-1355.2012.04.004
Abstract （2302）            Save
Abstract : Transfer path analysis (TPA) is an effective method for structure vibration performance optimization, evaluation and fault diagnosis. The basic theory and characteristic of TPA method is mainly described in the paper. The experiment system is established for TPA method to verify the TPA method. Comparison of simulation calculation value with experiment value shows that simulation result and experiment result are basically consistent. TPA method is used in four improved structures separately and reasonable structure is confirmed. The analytical results showed that the TPA method is a good way to find the vibration transmission path which provides the evidences to control the vibration transmission effectively.
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Vibration Mechanism Analysis and Design Improvement of Blade Pump
ZHOU Pu;LIU Rui-feng;ZHANG Yi
   2012, 32 (2): 32-33.   DOI: 103969/j.issn.1006-1355-2012.02.007
Abstract （1052）            Save
The marine equipment includes seawater marine pump, drainage pump, screw pump, hydraulic pressure pump, air-conditioning chilled water pump etc. These pumps work with various forms including rotation, reciprocation, meshing etc., and vibrate with different frequency characteristics. In this paper，the vibration levels, characteristics and causes of different rotational marine pumps were analyzed. Some measures for vibration reduction were proposed and applied to the improvement design of some pumps. The results of testing showed that the vibration level of these pumps was reduced as the expected.
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《Estimates of Vibration Isolation Efficiency for Floating Raft Isolation System by Statistical Energy Analyzing Method》
LIU Rui-feng;WANG Qiang;ZHANG Yi;GUO Yun-song
   2010, 30 (2): 34-37.   DOI: 10.3969/j.issn.1006-1355.2010.02.034
Abstract （1990）      PDF（pc） （1272KB）（1614）       Save
Using the statistical energy analyzing method (SEA), a model for analyzing the marine floating raft isolation system is established. The vibration isolating effect of the raft isolation system is measured and analyzed by means of the Vibration Level Difference method. Comparing experiment result with theoretically estimated value is civen out. It shows that this method can meet general need of engineering design.
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《Modal Testing and Model Relativity Analysis of Raft Frame》
LIU Rui-feng;WANG Qiang;ZHOU Pu;FENG Hai-jun
   2010, 30 (1): 22-24.   DOI: 10.3969/j.issn.1006-1355.2010.01.022
Abstract （2109）      PDF（pc） （703KB）（1686）       Save

The paper intends to analyze quantitatively the correlation between the NASTRAN finite element (FE) model and a testing model for a middle raft frame of a floatingraft isolation system. The first five vibration modes of the raft frame are estimated by finite element method (FEM) and measured by testing. The modal assurance criterion (MAC) matrix is established in LMS virtual lab for relativity analysis between the FE model and the testing model. The MAC estimated by LMS virtual lab shows that the modal computed by FEM is basically correct and the method can be used for dynamic esponse analysis of the structure.

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