Abstract: Taking a certain type of 126 kV GIS as the research object, the transportation vibration and shock characteristics are analyzed and studied. The three-dimensional solid structure model of GIS transportation unit is established, and the modal analysis and random vibration analysis with prestress under vibration conditions are carried out by using ANSYS Workbench software to obtain its natural frequency and mechanical strength of each component. The analysis results show that the maximum equivalent stress of the base is 153.5 MPa and the minimum safety factor is 1.53. The experimental research on the GIS transportation unit under abnormal shock conditions shows that the GIS equipment can still ensure good performance when the instantaneous shock acceleration reaches 6.7g, and the shock resistance is higher than the acceleration value required by the product is less than 3g standard. Through the analysis and research of GIS under vibration and shock conditions, the transportation performance of GIS is evaluated comprehensively, which has very important practical significance to ensure the transportation safety of GIS.

Key words: GIS transportation, finite element analysis, vibration and shock, prestressing force, random vibration