明满流气锤诱发尾水闸门异常的原型试验研究OA

This study aims to solve the abnormal tailrace gate operation induced by air hammer during free-surface-pressurized flow in hydropower station diversion systems.Prototype tests are conducted on Units 5 and 6(two units sharing one tunnel)of a large water conservancy project,using a multi-modal monitoring system integrated with laser tracking,digital industrial photogrammetry,dial indicators,and online displacement monitoring to collect 3D displacement,vibration acceleration,and dynamic stress data under load regulation.Results show that the test fully reproduces the air hammer impact:the gate's maximum downstream displacement is 6.64 mm,the locking beam's maximum lateral displacement is 4.88 mm,the extreme vibration acceleration is 25.928 m/s2,and the locking beam's peak dynamic stress is-94.9 MPa.All abnormal values,4.6-12.1 times the severe threshold of US EM 1110-2-2105,occur at impact.It is confirmed that large load regulation under extreme conditions triggers air hammer in the gate shaft,causing abnormal gate lifting and falling.The acquired transient fluid-structure interaction data provides a key benchmark for model test scale conversion,numerical inversion,and resonance risk early warning.