Rigidity Research On Large Width Screed Of Paver

Road is paved by screed which is one of the main components of paver during the construction process, whose rigidity, especially in the vertical direction of screed influence road surface evenness. The width of the ultra-wide screed in this thesis is16.5meters. How to ensure good performance on static and dynamic characteristics for ultra-wide screed is an important front problem in road construction area.In order to compass the object, by means of rigid simulation and experiment of9-meter wide screed, a reliable research method is designed.After that, the model of ultra-wide16.5-meter screed is built, then establish the FE model to calculate the rigidity of the screed, including static rigidity analysis, modal analysis and working-process simulation. Simulation results show that the rigidity of16.5-meter screed declines sharply, even though vertical supporting facility was equipped.To get the most rigid screed in a given space, Topology Optimization Technique is used to produce the main structure of vertical supporting facility of screed. According to the result and manufactured principle, a new mechanical structure is designed. Then verify the static and dynamic characteristics by simulation.Finally, research the steady-state response under the vibration excitation of vibrators, discuss the appropriate scope of the excitation frequency, compare the dynamic characteristic of screed between the one equipped with vertical supporting facility and don’t are to evaluate the effect which is furnished by vertical supporting facility on screed further.