Combustor Resonator Ring Insert Plates for LCF Crack Resistance

The patent applies local quality by introducing strengthenings at specific locations where cracks initiate. The hole geometry is modified locally with strengthening elements (such as reinforcement ribs or changed hole shapes) positioned at the exact locations where cyclic loading causes crack initiation, while the rest of the resonator box maintains its original simple geometry. This targeted approach prevents cracks without unnecessarily complicating the entire structure.

The patent applies local quality by providing reinforcement only where needed - at the specific locations where cracks initiate under cyclic loading. Rather than using uniformly thick plates throughout, the insert plates have localized strengthening features (such as reinforcement ribs or increased thickness) positioned precisely at crack initiation sites, allowing thinner plates elsewhere that reduce cooling air requirements while maintaining crack prevention where critical.

The patent applies local quality by modifying the thickness and geometry of insert plates at specific locations where cyclic loading causes crack initiation. The resonator ring maintains a generally uniform structure for ease of manufacture, but the insert plates incorporate localized strengthening features (such as reinforcement ribs or varied thickness profiles) positioned precisely where stress concentration occurs, providing crack resistance in high-stress areas without significantly complicating overall manufacturing.