Deformation Analysis Of12m Mechanical Assembly Screed

With asphalt mixture paver in road construction, the interaction of creed andmixed-material will make the work form of the screed directly reflected in the paving road.There is a large lateral dimension for the12m mechanical assembly screed, which leads thescreed a large deformation under the static force, thermal load and the exciting force.Especially in the process of paving the high-temperature asphalt mixture, it accumulates agreat thermal deformation that both ends of the screed curved upward. It is helpful to make asignificant improvement in the flatness and density of the road that the research ofdeformation of12m mechanical assembly screed under the static force, thermal load and theexciting force.The geometric model of the12m screed was built through the use of Pro/ENGINEERsoftware, which was further imported into the ANSYS Workbench software. In the ANSYSWorkbench software, there was a series of analysis of the screed including a linear staticstructural analysis, coupled analysis of steady-state thermal analysis and linear staticstructural analysis, modal analysis and harmonic response analysis. The results of the coupledanalysis were validated by the screed thermal deformation test. Based on the analysis and thetest, it was studied that the influence of the rod’s installation position and combination on thescreed under the static force, thermal load and the exciting force.Linear static structural analysis showed that the above and behind rods were able tosignificantly inhibit the vertical deformation of the screed, but to vertical deformationinhibitory effect was small. Thermal deformation analysis showed that the thermaldeformation of the screed is much larger than the screed’s longitudinal deformation andvertical deformation. The rod should be installed as close as possible to both ends of thescreed to maximize the suppression of the thermal deformation of the screed. It was used tocompensate the thermal deformation of the screed that the section compensation method orthe overall compensation method. Modal analysis showed that the stiffness of the rods closeto both ends of the screed decreased as the length increased, which had more resonantfrequency bands within the screed’s operating frequency range commonly used. During thedesign of long screed rod, the structural rigidity should be increased in order to reduce theresonant frequency bands. Harmonic response analysis showed that the installation of the rodcan significantly improve the uniformity of the amplitude of the screed. The closer the rodinstallation position was to the two ends of the screed, the more uniform the amplitude of thescreed is.