Vibration Power Flow Analysis Of Thin Plate Under Thermal Load

The vibration of engineering structures often lead to the generation of noise,the structure of the vibration and noise measurement are very important aspects in the structural design,in order to more effectively study the simple structure vibration about the dynamic characteristics of the internal structure,the research of structure vibration power has become the research hotspot in the field of structural vibration and noise control.This article is based on the Vibration Intensity Method to study the characteristics of transmission and distribution of the plate structure vibration power flow.This article introduces the vibration structure of the energy transmission form,from the vibration structure models and the research methods two aspects to analysis and summary the current research of vibration power flow.Research the most basic plate in the engineering structure,based on the Vibration Intensity Method,analysis the vibration power flow characteristics of four edges simply supported plate with the external load.Introduces the different damping characteristics,elastic surface differential equation of the thin plate,the application of Modal Superposition Method to calculation structure natural frequency and lateral displacements,the calculate formula of the Vibration Intensity Method,the visualization technology of analysis power flow and other related content,as the theoretical basis of this paper.With four edges simply supported rectangular plate as an example,based on the Vibration Intensity Method use MATLAB to calculate the vibration power of the plate structure,use the vector visualization and streamline visualization method to representation the vibration power flow,determine the vibration structure the position of vibration source,the transmission path of power and the position of energy is absorbed.Focus on different excitation frequency,the disturbance amplitude,viscous damping coefficient on the effect of vibration power flow in the thin plate structure is discussed.To the structure with thermal load vibration energy flow characteristics of the analysis provide the necessary theoretical support.The main analysis of the engineering structures with the mechanical load and thermal load,the stress of the two kinds of plate structure model is established,by the numerical simulation,to analyze the mechanical load and thermal load influence on vibration powerflow characteristics,change the numerical size to analyze the mechanical load and thermal load on the influence of vibration power,change numerical size to analyze the mechanical load and thermal load on the influence of vibration power flow,in temperature conditions,is obtained by increasing the external force amplitude,can eliminate the change of the thermal load of vibration power flow.In this paper,based on the Vibration Intensity Method,from the perspective of vibration power flow visualization analysis,get the simple plate structure power flow transmission characteristics,from the thin plate vibration structure of the internal power transmission of vibration are analyzed.