Research On Earthquake Response And Dynamic Reliability Analysis Of The Gantry Crane

Gantry crane is one of the most important equipments in modern industrial production, which is essential for goods handling, lifting and some other works. In recent years, earthquakes are frequent, and earthquake often make serious damages on the high-rise structures and large-scale systems, so it has good practical significance to research on the displacement and stress of the gantry crane dangerous section under earthquake load and propose scientific dynamic response data. Meanwhile, reliability is a very important index to measure the quality and performance of the gantry crane. Higher reliability not only ensure the gantry crane achieve good performance when in the working course, but also can reduce the failure rate, lower the maintenance costs and improve the security performance. So reliability is the core of the quality for gantry cranes, and common goal which manufacturing and user pursuit. The main research methods and contents are included in this paper as follows:1. Research various load combination cases of the gantry crane, loaded the model and get the maximum equivalent stress of displacement and deflection under various working conditions. Check the static strength and stiffness according to the relevant requirements of crane design.2. The modal analysis procedures of gantry crane were written, and the top ten bands of the vibration mode and frequency of the gantry crane were gotten, as well as its dynamic stiffness were also checked.3. Using transient dynamic method analyzed the dynamic response of the gantry crane under earthquake loading. Mainly research the maximum equivalent stress and displacement of two key node positions of the beam.4. The dynamic reliability analysis of this gantry crane is completed. A reliability analysis program of gantry crane was produced by using PDS design module in ANSYS, and the generation of the analysis document, reliability analysis, results output and comparison were achieved. Implement the reliability analysis process through analysis loop and show the distribution of the random input and output. The sensitivity analysis of input, which can influence output, was performed by checking the dynamic reliability results of the gantry crane.