Based on main landing gear frame front fork root of a certain aircraft multiple occurrences of fatigue crack

the front fork as main landing gear frame key-module

seriouly influence safety of the landing gear. Through stress analysis of the structure using ANSYS Workbench simulation softwarely

weak positions of the frame front fork were obtained

and its structure and comparative analysis were optimized by combination of topology optimization and goal driven optimization method. Obtained weak parts were in conformity with the actual usage

structure is reasonable

stress obviously improved

and weight decreased by 17.3% than before optimization.