Research On The Design Methodology Of The Large Thin-wall Transport Jig

This thesis investigates the transport jig of a large-scale aircraft components, which combines with the requirements of the development of china's aerospace industry and accordings to the actual situation of the domestic enterprises manufacturing this kind of jig. Apply reliability theory to do reliability analysis of the jig, with ADAMS and ANSYS Workbench software to establish model, do motion simulation and analyze the stress and strain of the jig, form which concluding some basic principles of the large thin-wall transport jig designing and providing corresponding guidance theory and reference standards for china's self - designed this kind of transport jig. Following is the main research contents and conclusion:1. Using FMECA theroy to do detailed reliability analysis of the transport jig's material selecting, welding and machining, complete FMECA analysis table and hazard matrix analysis. Analytical results indicate that welding is the most dangerous process. So we should pay more attention to welding process, make detailed welding technology, do strictly techncal training to the welding personnel, minimize the human factors'influence,to ensure the reliability of this process.2. Using CATIA and ADAMS software to established aircraft-transport jig dynamics model; Based on wave spectrum theory, complete the dynamic simulation of the jig's sea transport in ADAMS software, from which getting the load of the jig's key components. The results show that: in different wave height, the RMS value of the loads of the selected measured points are more or less the same; in different wave height, the maximum loads of the the selected measured points are greatly different. This conclusion provides certain reference basis to select the air jig transport condition.3. to analyze the stress and deformation on jig's key components with finite element software ANSYS Workbench using the results of the maximum loads obtained from the simulation test, compare the analytical results to the mechanical specifications of the materials used in existing transport jigs and do fatigue analysis of the jig components. The result indicates that it requirements for high reliability in design of a transport jig's key components to ensure the safety of the large structural components. This conclusion can provide certain reference basis to design the large-scale thin-wall transport jig for its material and parameters selection.