Application Of Functionally Graded Plate Components In Traffic Structures

Functionally graded material(FGM)is a new type of composite material,which is usually composed of metal and non-metal materials.It can adjust the composition of FGM structure according to different engineering environment and application background to meet the design requirements of engineering.FGM has a wide range of applications in transportation,construction,aerospace and other fields.Therefore,the research on the mechanical properties of FGM structure will provide important theoretical guidance and practical significance for the practical application of FGM in engineering.The main research work of this paper includes:(1)Based on composite thin plate theory and first-order piston theory,and considering heat conduction,the mechanical model of FGM plate members with piezoelectric layer functionally graded material under aerodynamic/electrical/thermal/mechanical combined loads under supersonic airflow is established;(2)The effects of mach number,airflow deflection angle and other factors on structural vibration,buckling and flutter of FGM plate are analyzed;(3)The influence of pre-applied voltage on the vibration,buckling and flutter characteristics of FGM plate structure is discussed;The control effect of pre-applied voltage on the mechanical behavior of FGM plate structure is discussed;(4)The performances of FGM plate structure with piezoelectric layer on its surface under supersonic airflow are studied in several traffic engineering practices.Based on composite thin plate theory and first-order piston theory,this paper establishes the linear vibration control equation of FGM plate structure,and solves the vibration,dynamic response,buckling and flutter characteristics of FGM plate structure with Galerkin method,which provides an efficient and reliable analysis method for the work of this paper.Then,according to the theoretical results derived and combined with the actual engineering situation,the mechanical characteristics of FGM plate structure in three-parameter viscoelastic foundation,bridge engineering,power transmission engineering and other traffic engineering structures are emphatically analyzed.The advantages and disadvantages of FGM plate structure compared with ordinary materials are discussed:(1)FGM plate structure can bear more temperature load than ordinary steel material under viscoelastic foundation condition;(2)FGM plate structure can withstand more temperature loads than ordinary steel materials;(3)FGM plate structure has better deformation ability under external loads such as wind load and mechanical load;(4)FGM plate structure can resist higher axial velocity than ordinary material plate,and is not easyto buckle;(5)FGM structure has more flexible combinations than ordinary materials.Based on the theoretical methods used in this paper and the actual research object of the project,the corresponding program packages are compiled in computer language,and the more accurate results are deduced for this paper.The research results of this paper will help to promote the application of FGM plate structure in traffic engineering structure in the future,and will promote the study of mechanical properties such as vibration,buckling and flutter of plate structure.