Type 1-3 Piezoelectric Composite In The Road Application Simulation Studies

Along with the rapidly development of China’s economy,the demand for intelligent transportation has become more urgent and the field of road engineering has ushered in a rare opportunity for development,but at the same time,higher demands are being placed on the functionality of pavements.Piezoelectric effect-based pavement vibration energy harvesting technology is receiving increasing attention.It can not only solve part of the energy shortage problem,but also provide the corresponding technical support in the fields of self-awareness,self-regulation and self-supply of intelligent pavements,giving full play to the potential of intelligent roads themselves.This thesis uses ANSYS finite element analysis software as a research tool to carry out force-electric coupling analysis on the established three-dimensional equivalent asphalt pavement structure,and systematically investigates the influence of different piezoelectric functional phase types,piezoelectric phase volume share,loading method,load size and loading speed on the piezoelectric conversion of type 1-3 road piezoelectric composites applied to the pavement structure,in order to provide a theoretical basis and experience for the future pavement piezoelectric power generation Theoretical basis and empirical data are provided for the wide application of piezoelectric power generation technology in pavements in the future.The main elements of the study are as follows:1.Based on the intrinsic relationship between the piezoelectric functional phase material and the matrix phase material,the equivalent parametric model suitable for the performance prediction of piezoelectric composites of type 1-3 roads is established using the methods of series-parallel theory,uniform field theory and composite mixing law,and the calculation expressions of some main parameters are derived.2.The ANSYS analysis model is established and the piezoelectric conversion analysis points of 1-3 type piezoelectric composites for road are determined.Starting from the piezoelectric power generation theory,the three-dimensional structure of the pavement and the type 1-3 piezoelectric composite material were firstly modelled,followed by the determination of the load loading,boundary constraints and material parameters assignment in the finite element analysis,and finally the stress-strain situation of the pavement structure under the action of traffic load was analysed.The best location for the application of 1-3 piezoelectric composites in the piezoelectric generating road was determined to be at a depth of about 4 cm from the pavement.3.Using ANSYS finite element analysis software,the effect of different influences on the piezoelectric conversion was analysed and the relationship between the material type,volume share of the piezoelectric phase,loading method,load size,travel speed and the piezoelectric conversion was established.Through the finite element analysis,the 1-3 type road piezoelectric composites with PZT-5H as the functional phase have higher piezoelectric energy conversion,and the thickness electromechanical coupling coefficient of the composites is improved by about 20%when the volume share of the piezoelectric phase is between 50%and 65%,and they have good piezoelectric conversion capability,with the maximum conversion voltage between 1886.08 V and the maximum piezoelectric conversion power of The maximum conversion voltage is between 1886.08 V,the maximum piezoelectric conversion power is14.28 x 10^-3 J,and the maximum thickness electromechanical coupling coefficient is 0.6493.The calculated daily conversion power is about 0.572 kw/h per km for the pavement structure with the application of type 1-3 piezoelectric composites.The accuracy of the constructed 1-3piezoelectric composite finite element analysis model was verified,providing a theoretical basis and empirical data for the practical application of piezoelectric power generation technology for road surfaces.