Crack Analysis and Improvement of Helicopter Engine Compartment Partition

The crack on the engine compartment partition of a helicopter continually occurs, which has affected the flight safety. First, the simplified modeling of engine and local structure detail modeling are studied. Then combined with the flight test data and fracture analysis, the high-cycle failure of the structure under the action of aerodynamic pressure and vibration force is analyzed by using the method of frequency response simulation. The average S-N equation is used to improve the design of the original structure. The fatigue damage resistance of the new structure is obviously improved and has infinite life. A new maintenance platform is also designed for the problem of small engine maintenance space feedback from users. The platform not only increases the maintenance space, ensure the safety of staff, but also reduces the probability of accidental damage to the engine compartment partition.