Estimation of hydrodynamic loads acting on downstream fastening plates of low-pressure tubular structures

In the article are presented results of state analysis low-pointed tubular culverts widely used in land reclamation and fisheries construction, lower pool which is made form an expanding socket with a central angle 300 to 600 checker-type energy absorbers. Field surveys have shown that only Moscow region such structures, built mainly 60-70s last century, makeup 76% total number structures on water systems. The condition from 70% 85% them, depending unsatisfactory: dampers deformed even shifted, lining break apron destroyed, excessive erosion observed discharge channel. experimental studies averaged pulsating pressure downstream attachment elements (the bottom flooded hydraulic jump zone initial sections apron), performed at Reynolds numbers (20...75) 103 model installation 3-point sluice-regulator, showed change bell parameter within 1.5...4.5 does not affect nature longitudinal transverse distribution diagrams average behind it. As result, universal schemes static loading by vertical load surface flow been developed. channel slopes, fluctuation occurs due disturbance; therefore, low-frequency component traced autocorrelation functions, also determines spectrum's shape. It proved when constructing quasi-static plates instantaneous for triangular spreaders dampers, it possible correctly use correlations corresponding spatial turbulence apron-homogeneous. maximum amplitude any size should be calculated transition coefficient equal approximately 3.85 no more than 4.5 breakage. obtained make perform entire complex calculations assess stability various considered typology.