Study On Road Piezoelectric Conversion Performance Under Traffic Load

Road transportation is the cornerstone of national and social development.With the vigorous development of socialism with Chinese characteristics,the concept of green and low-carbon sustainable development in transportation has been paid more and more attention.Based on the concept of sustainable development and low-carbon environmental protection,road piezoelectric energy collection has certain research value.Based on the indoor traffic load model test and theoretical analysis,the related characteristics of road piezoelectric conversion are studied in this paper.In this test,the piezoelectric conversion characteristics of pavement are studied systematically from cement pavement and asphalt pavement.The main contents are divided into the following three aspects:(1)The single-point excitation loading is adopted under the condition of cement concrete pavement.The difference of dynamic response between the common road and piezoelectric road(including piezoelectric layer)is discussed.In this test,the effects of excitation load,excitation frequency,thickness of concrete pavement,thickness of subgrade and whether or not piezoelectric layer on the common road and piezoelectric road are considered.Comparing the two road conditions,it is found that when the piezoelectric layer is installed,a part of the vibration and energy dissipation of the road can be reduced without adversely affecting the road structure.(2)The characteristics of road piezoelectric conversion under the condition of cement concrete pavement are studied.The influences of the excitation frequency,the excitation load,the conditions of subgrade,the thickness of concrete pavement and the positions of piezoelectric transducers on road piezoelectric conversion are considered.The results show that the effective piezoelectric range under the rigid surface layer is wide,and the influence of excitation load and excitation frequency is particularly significant.(3)The characteristics of road piezoelectric conversion under the condition of asphalt pavement are studied.The influencing factors include the shape of piezoelectric wafer,excitation load,excitation frequency and number of exciters,thickness of cement stabilized gravel layer,thickness and smoothness of asphalt pavement.The results show that the piezoelectric coupling theory model of the elasticdouble-layer plate is suitable for the piezoelectric conversion performance study of the test.