关键词: 联合仿真；LGF/PP；复合材料尾门；尾门内板；模态分析；各向异性；仿真精度

Abstract: In order to improve the simulation accuracy of mode analysis of composite tailgate with LGF/PP, a co-simulation method of Moldflow, Helius and Abaqus was adopted. Firstly, a material model of LGF/PP was built based on tensile test with different fiber orientation. Secondly, based on actual molding process, Moldflow is used to calculate the glass fiber distribution, which is mapped to the modal finite element model by Helius, then the final co-simulation model is obtained by combining with both the material constitutive model and mapped fiber orientation. Finally, the comparison was performed between simulation and physical test, and the error is within 6%. The results show that the mode value calculated by co-simulation model is closer to the mode of physical test, and this method can obviously improve the simulation accuracy, this provides important reference value and practical significance for the accurate prediction of modal performance of this kind of products and also can be applied to improve the simulation accuracy of mechanical behavior such as structural stiffness, strength, and thermo-mechanical coupling.

Key words: Co-simulation; LGF/PP; Composite tailgate; Inner panel; Mode analysis; Anisotropy; Simulation accuracy