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Simulation on structure strength of fuel rail

WANG Fei;Dassault Systemes ( Shanghai) Information Technology Co. ,Ltd.;  
The structure strength of fuel rail is analyzed by the method of simulation combined with test.The theory of modal analysis and frequency response analysis and modeling characteristics of fuel rail are discussed. Abaqus is used to numerically simulate an instance of a fuel rail. The key issues such as meshing,algorithm selection and damping parameter are analyzed. The results of simulation and test show that,the first order frequency of the fuel rail is 320. 22 Hz and the maximum stress obtained by frequency response analysis is 330 MPa,which indicate that the structure is dangerous; the thickness of the bracket is increased by 1. 5 mm and then the first order frequency of the fuel rail becomes 524. 00 Hz,and the first order frequency measured by test is 512. 00 Hz and the relative error of the simulation and the test is 2. 3%,which indicates that the structure passes the frequency test.
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