CAJ | 학술논문

目的：针对 C919大型客机机身双曲度蒙皮进行纵向拉形的加载轨迹优化与试验研究。方法应用蒙皮拉形工艺设计制造软件，采用优化设计的方法，对机身典型蒙皮零件进行纵向拉形加载轨迹设计；进行拉形过程的有限元仿真，判断设计的加载轨迹是否满足成形要求，将优化后的加载轨迹应用于实际零件成形；进行实际零件拉形试验，对毛料伸长与局部应变进行测量，与有限元仿真进行对比，验证有限元仿真的准确性。结果实际零件的毛料伸长与轨迹设计和有限元模拟的伸长量十分接近；将优化设计后的加载轨迹应用于实际零件的成形，获得了满足零件交付要求的蒙皮零件。结论通过加载优化设计与试验，验证了有限元模拟有较好的精度；通过加载轨迹优化与有限元模拟结合的拉形工艺设计方法，可以用于零件的实际生产。
목적：침대 C919대형객궤궤신쌍곡도몽피진행종향랍형적가재궤적우화여시험연구。방법응용몽피랍형공예설계제조연건，채용우화설계적방법，대궤신전형몽피령건진행종향랍형가재궤적설계；진행랍형과정적유한원방진，판단설계적가재궤적시부만족성형요구，장우화후적가재궤적응용우실제령건성형；진행실제령건랍형시험，대모료신장여국부응변진행측량，여유한원방진진행대비，험증유한원방진적준학성。결과실제령건적모료신장여궤적설계화유한원모의적신장량십분접근；장우화설계후적가재궤적응용우실제령건적성형，획득료만족령건교부요구적몽피령건。결론통과가재우화설계여시험，험증료유한원모의유교호적정도；통과가재궤적우화여유한원모의결합적랍형공예설계방법，가이용우령건적실제생산。
Objective To study the optimization design method and production experiment on the longitude stretch forming loading path for double-curved fuselage skin of large aircraft. Methods Appling the optimal design method, The loading path of longitude stretch forming for double-curved fuselage skin of large aircraft has been optimized with XSTR Stretch software. The stretch process is simulated with FEM to evaluate the designed loading path. The optimized loading path has applied di-rectly for the actual part forming. The elongation and local strain of the blank is measured after the actual part stretch forming test and measurements compare with the FEM simulation to verify the accuracy of FEM. Results The elongation of actual forming part and FEM simulation is proximity and acceptable. The fuselage skin which meets the delivery requirement has been obtained after applying the optimized loading path. Conclusion The accuracy of FEM is verified by the lading path de-sign and actual part forming tests. The design method combined with optimized method and FEM simulation is capable for ap-plying to actual part fabrication.