Thermal-mechanical Coupling Simulation Of The Servo Mechanism And The Electronic Cabin Thermal Simulation Analysis

In this thesis, servo mechanism and electronic cabin of circuit board were studied. According to the comprehensive environment of the product, the temperature and mechanical properties of the integrated environment have been analyzed. To servo mechanism, the simulation analysis of the temperature environment and the temperature-vibration environment were carried out. As to temperature distribution analysis of electronic cabin simulation, only heat generation and heat radiation of electronic cabin itself were taken into consideration.Different from the traditional finite element analysis, the thermal analysis of the electronic cabin with Icepak has considered the anisotropy of the thermal conductivity of the PCB plat, of which the simulation results have reached the level of circuit board. Moreover, the physical conditions, such as radiation, gravity, natural convection and so on were taken into account too. First of all, the geometric model of the integrated electronic cabin and the circuit model with the routing information were integrated in the Icepak to establish the finite element model. According to the heat consumption and environmental boundary conditions, the temperature distribution of the electronic cabin was obtained. And the simulation results were verified by temperature measurement test. Lastly, according to the temperature distribution of the simulation, the structural design and layout of the electronic cabin were evaluated.Simulation analysis of mechanical characteristics of the servo mechanism under the temperature and vibration integrated environment were conducted with sequential coupling method through ANSYS/Workbench. According to the actual contact between the different parts of the servo mechanism, the simulation model was set up for different contact types based on comprehensive consideration of fixed and friction.Firstly, the finite element model of the servo mechanism was established in ANSYS/Workbench. The temperature field distribution of different working conditions was obtained by applying the different ambient temperature. The mode of the servo mechanism with different temperature was calculated with the pre-stress which was the temperature stress calculation result of static temperature load. At last, the mechanical response of the mechanism in the integrated environment of temperature and random vibration was calculated by the mode superposition method.Through strain measurement of servo mechanism under the temperature and vibration integrated environment which was conducted in the comprehensive test platform, the correctness of the simulation has verified by contrasting the simulation results of the test points.CoMParing the simulation results with the different temperature environment of the servo mechanism, the influence of temperature on the mechanism mode and the random vibration response were analyzed. It has provided a basis for further study of the mechanical properties of the servo mechanism under various environmental conditions to analyze and evaluate the structural design of servo mechanism.