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Analysis of Dynamic Characteristics of 4120SG Diesel Engine Block

LI Yu-jun

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Abstract

In order to establish an accurate finite element model of an engine block and to get a completely structural dynamic characteristics,the experimental modal analysis of model 4120SG engine block was carried out in the paper.The modal parameters were recognized by use of the software LMS TestLab,and calculated by NASTRAN.The body modes of the every orders was obtained,and the inter-modal MAC values between the experimental modes and the computed modes were calculated.The finite element model was validated.

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What this paper is about

In order to establish an accurate finite element model of an engine block and to get a completely structural dynamic characteristics,the experimental modal analysis of model 4120SG engine block was carried out in the paper.The modal parameters were recognized by use of the software LMS TestLab,and calculated by NASTRAN.The body modes of the every orders was obtained,and the inter-modal MAC values between the experimental modes and the computed modes were calculated.The finite element model was validated.

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Available abstract

In order to establish an accurate finite element model of an engine block and to get a completely structural dynamic characteristics,the experimental modal analysis of model 4120SG engine block was carried out in the paper.The modal parameters were recognized by use of the software LMS TestLab,and calculated by NASTRAN.The body modes of the every orders was obtained,and the inter-modal MAC values between the experimental modes and the computed modes were calculated.The finite element model was validated.

Key concepts: Finite element method, Modal, Diesel engine, Modal analysis, Block (permutation group theory), Cylinder block, Structural engineering, Engineering

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