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* Corresponding author Abstract—Carry out the static analysis of the frame under different working conditions and put forward four kinds scheme of the improvement of the beam, longitudinal beam and traction plate. Besides, carry out the modal analysis of the frame, get the natural frequency and vibration mode of the frame, to provide the driver with a reliable theoretical basis to avoid the resonance. Keywords-gooseneck type semi-trailer frame; static analysis; modal analysis; structural improvement; optimal design

Research on Optimal Design and Modal Analysis of the Frame