Vibro-acoustic analysis of free piston engine structure using finite element and boundary element methods

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5 Citations (Scopus)

Abstract

This paper presents the results of vibro-acoustic modeling and simulation using the finite element and the boundary element methods for the free piston engine structure. A model of the engine was constructed through the use of finite element software to perform a normal mode analysis of the engine structure. The objective was to determine the mode shapes and the natural frequency that contribute to engine structure vibration. Theoretical development of the engine balance motion and frequency response was also conducted. From the simulation and finite element analysis, the force response pattern of the engine vibration was determined and then compared with its natural frequency. The vibration data were used as the input data for noise analysis using the boundary element method. The integration of the finite element and the boundary element determined the noise-frequency data of the engine structure toward the occurrence of engine noise. The information can be used by designers to analyze engine specifications and structure, especially at the preliminary design stage.

Original languageEnglish
Pages (from-to)2405-2411
Number of pages7
JournalJournal of Mechanical Science and Technology
Volume26
Issue number8
DOIs
Publication statusPublished - Aug 2012

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Free piston engines
Boundary element method
Acoustics
Engines
Vibrations (mechanical)
Natural frequencies
Insulator Elements
Frequency response
Specifications
Finite element method

Keywords

  • Boundary element method
  • Finite element analysis
  • Noise
  • Normal mode
  • Vibrations

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

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abstract = "This paper presents the results of vibro-acoustic modeling and simulation using the finite element and the boundary element methods for the free piston engine structure. A model of the engine was constructed through the use of finite element software to perform a normal mode analysis of the engine structure. The objective was to determine the mode shapes and the natural frequency that contribute to engine structure vibration. Theoretical development of the engine balance motion and frequency response was also conducted. From the simulation and finite element analysis, the force response pattern of the engine vibration was determined and then compared with its natural frequency. The vibration data were used as the input data for noise analysis using the boundary element method. The integration of the finite element and the boundary element determined the noise-frequency data of the engine structure toward the occurrence of engine noise. The information can be used by designers to analyze engine specifications and structure, especially at the preliminary design stage.",
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