The Research Of Lightweight On A Special Power Vehicle’ Shelter

The paper analyzes the lightweight methods of a military power vehicle shelter bychancing the structure of shelter from a steel framework to composite laminated plates.According to structural characters of shelter，its finite elements model is built bynecessary simplification, and tests the design with use of the finite element method tostudy structural characters of composite laminated plates shelter.Shelter’s mechanics characters is analyzed by use of ANSYS Workbenchsoftware．And on the basis of discussing the follow four kinds of work stations：staticflex (uniform motion in the straight line)，static torsion(the road is steep)，hard breakand bard turn. The results of calculating shelter’s rigidity and strength performanceindicate that ascertain the structure’s displacement and von mises stress，so that thedefects of design can be fund out．And the conclusion can give references for thefollowing optimization.Design shelters，the natural frequency should be staggered so that the excitationfrequency to avoid resonance and noise．Strength and rigidity of the shelters’ dynamiccharacteristics of the vibration comfort, ride comfort，safety and life has a great impact.Therefore，the inherent characteristics of the frame structure of the modal analysis isuseful work．Harmonic response analysis is intended to ensure that a given structure can bear avariety of different frequency sine load function, detecting resonance response and,where necessary, to avoid its occurrence. In this paper, mode superposition method forthe shelter harmonic analysis，6feature points’ frequency—response curves ofdisplacement．For the situation of traffic is complicated, carry out random vibration analysis byusing the road displacement spectrum, finally the software calculates the von misesstress of two conditions based on modal analysis’s results. The results show that thevehicle bears the maximum load when it is moving on gravel road at a speed of40kilometers per hour．The finite element analysis provides valid theory and methods for the simulationand optimization of the shelter and dynamic capacity through the paper’s study. Thestructure of shelter consisting of composite laminated plates meets requirements, andat last the shelter’s weight cut down47％.