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Shock Testing Technique of Marine Diesel Power Plant

WANG Zhi-gang;SHEN Jian-ping;MA Bing-jie

2012, 32 (1): 177-179. DOI: 10.3969/j.issn.1006-1355-2012.01.042

Abstract （1848）

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Anti-shock capacity of marine diesel power plant is very important for the survival of modern navy ships. Ship’s shock testing is an effective approach to study the anti-shock competence of the plant. In this article, the shock testing technique of marine diesel power plant is studied. The selection of test parameter, sensor installation, construction of test system and data processing of the diesel power plant are discussed. Finally, the shock testing method of marine diesel power plant is summarized. The result of this study can be applied to the shock test of some other marine equipment.

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Dynamics Analysis of Power Transmission System of Diesel Engine

MA Bing-jie;SHEN Jian-ping;ZHAO Da-peng;WANG Wen-jie

2011, 31 (6): 86-90. DOI: 10.3969/j.issn.1006-1355-2011.06.019

Abstract （1659）

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Vibration character analysis for the powertrain system of a diesel engine has been accomplished by means of the FEM based on multi-body dynamics model. The loading conditions applied to the diesel engine and the gear box are very similar to the practical situation, for example the connections between the engine and the gearbox are simulated by preload bolts and the headstock loads are simulated by the compressive elements without extension. The results show that the vibration level in the surface of the bottom shell of the engine is the highest. So, it is suggested that the ribbings be used in the side wall of the bottom shell. Since the vibration level of the engine surface increases gradually from the bottom to the top of the engine, it is suggested that composite material and high damping material be used to reduce the vibration level of the engine.

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Affect of Displacement Restrictor on Shock Resistance Performance of Double-stage Vibration Isolation System

MA Bing-jie;SHEN Jian-ping;WANG Zhi-gang

2011, 31 (6): 72-75. DOI: 10.3969/j.issn.1006-1355-2011.06.016

Abstract （1853）

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With the given shock actions, the displacement response of the equipment with vibration isolation mounting may exceed the deformation limits of outside pipelines, and even exceed the deformation limits of isolators themselves. Therefore, displacement restrictors should be used in order to limit the relatively large displacement without acceleration response increasing. In this thesis, the double-stage vibration isolation system is researched, displacement restrictors is simulated with nonlinear springs, the shock responses is analyzed using direct integral method, and the affects of parameters (stiffness and gap) on isolation mounting performance is discussed. Finally, a significant conclusion is summarized.

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Hybrid Simulation of Powertrain System Based on the Combination of Test Model and FE Analysis

MA Bing-jie;FENG Hui-hua;SHEN Jian-ping

2011, 31 (6): 57-61. DOI: 10.3969/j.issn.1006-1355-2011.06.013

Abstract （1496）

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In order to realize high efficiency and high precision dynamic analysis for complex structures, the method of hybrid simulation with the combination of test mode analysis and finite element analysis is brought forward based on the idea of substructures. This method is realized in the Virtual Lab platform. Taking the vibration modes of a whole diesel engine resulted from experiments and the vibration modes of a gearbox resulted from the finite element analysis as examples, the hybrid simulation method is verified. With this method, a dynamic simulation of a powertrain system is done. It is found that the results of the hybrid simulation of the whole powertrain model are essentially the same as those from the finite element analysis, but this method consumes much less computer time. Thus, the hybrid simulation method is accurate and effective.

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《Research on Vibration Control of Ship Drive System》

TONG Zong-peng;ZHOU Wen-jian;WANG Guo-zhi;SHEN Jian-ping

2009, 29 (6): 136-139. DOI: 10.3969/j.issn.1006-1355.2009.06.136

Abstract （2580）

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The diesel propulsion system is be widely used in the dynamical system of the ship. The being vibration analysis of the drive system emphasizes particularly on the torsional vibration of the shafting. It is mostly aimed at the security of the shafting, while the effect of the structural vibration and the transfer and attenuation of the vibration energy following shafting are out of the consideration. The professional computational analysis method is short. In this paper, the researches of control technique about the structural vibration of the drive system were carried out using the elasticity couplings, rubber isolators and so on. Meantime, the virtual simulation calculation method about structural vibration of the flexible drive system was established based on the representative diesel propulsion system.

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