Analysis of Temperature Field of Vertical Lock Joint Metal Roofing System

The temperature effect of solar radiation on a large-span metal roofing system under insolation is very significant. In this paper， the temperature field of the roof panel and its changing law were studied by taking a vertical locking seam aluminium alloy roof as the object. Considering the influence of different horizontal inclination angles and panel orientation on the temperature of the roof panel， ANSYS thermal analysis module was used for upright lock seam roof system roof panel to establish a finite element model considering the air convection heat transfer， ambient long-wave radiation heat transfer， solar radiation and other factors， analysed the roof of the various positions in the solar irradiation of the temperature distribution law. At the same time， to carry out tests to verify the results of numerical simulation， according to the test results， a detailed analysis of the temperature field and the change rule of the roof panel under natural environmental conditions， the test results verify the feasibility of the simulation method. The results show that the aluminium alloy roof panel is a heat-sensitive component， in the sunshine under the action of a very short period of time rapid warming， no solar radiation when the roof temperature drops rapidly， the sun direct radiation is the main influence of the temperature rise， the same moment the roof temperature field tends to be consistent distribution is more uniform. The maximum temperature of the roof panel reaches 66.93 ℃， and the temperature difference with the environment reaches 33.93 ℃. It will be more obvious in the actual large-span aluminium alloy roofing system.