Abstract

Info

Title:: Characteristics of Non-uniform Solar Temperature Field for Large Radio Telescope Structure

Author(s):: LIU Yan; QIAN Hong-liang; FAN Feng; School of Civil Engineering, Chang’an University

Keywords:: large radio telescope structure; solar radiation; shadow shade; nonuniform temperature field; thermal deformation

Abstract:: The refined numerical model of the solar temperature field for telescope overall structure was established by transient heat transfer finite element method, with the factors of solar radiation, shadow in surrounding environment, periodic air temperature, etc. taken into consideration at the same time. The worstcase weather condition was selected to analyze the solar effect for them and the distribution of nonuniform solar temperature field for the telescope structure was figured out. The main reflector surface precision by the time course was acquired during the change of pitch and azimuth angles, and the essence of the effect distribution characteristics was revealed. The study results can provide valuable real time date reference for the construction, sensor arrangement and thermal deformation control of actuator.