A fluid damping structure comprising: a first annular element having an outer radial surface; a second annular element having an inner radial surface; a first inner seal disposed radially between and engaged with both the first annular element and the second annular element; a second inner seal disposed radially between and engaged with both the first annular element and the second annular element; a first outer seal (94A; 94B; 94C) forming a sealing interface between the first annular element and the second annular element, wherein the first outer seal (94A; 94B; 94C) is disposed radially outward from at least one of the first and second inner seals (98, 100); a damping chamber defined by the first annular element, the second annular element, the first inner seal, and the second inner seal; a supply plenum (72A; 72B; 72C) disposed contiguous with an axial side of the damping chamber, wherein the supply plenum (72A; 72B; 72C) extends from the second inner seal to the first outer seal (94A; 94B; 94C); a fill port (146A; 146B; 146C) in fluid communication with the supply plenum (72A; 72B; 72C) and a source configured to supply a damping fluid; and a plurality of fluid passages (140; 140A) disposed in the first annular element; wherein the fluid damping structure is configured such that one or more of the fluid passages (140, 140A) is disposed in an open configuration when a local damping fluid pressure within the damping chamber is less than a local damping fluid pressure in an adjacent region of the supply plenum (72A; 72B; 72C), and the one or more of the fluid passages (140; 140A) is disposed in a closed configuration when the local damping fluid pressure within the damping chamber is greater than the local damping fluid pressure in the adjacent region of the supply plenum (72A; 72B; 72C); characterized in that the fluid damping structure further comprises: a ring disposed axially adjacent to the first and second annular elements; a second outer seal (96C; 96D), wherein the second outer seal (96C; 96D) forms a sealing interface between the ring and the first annular element; and a plenum formed between the ring and the second annular element, wherein the plenum is partially enclosed by the second outer seal (96C; 96D), and wherein the plenum is in fluid communication with the first inner seal. a first annular element having an outer radial surface; a second annular element having an inner radial surface; a first inner seal disposed radially between and engaged with both the first annular element and the second annular element; a second inner seal disposed radially between and engaged with both the first annular element and the second annular element; a first outer seal (94A; 94B; 94C) forming a sealing interface between the first annular element and the second annular element, wherein the first outer seal (94A; 94B; 94C) is disposed radially outward from at least one of the first and second inner seals (98, 100); a damping chamber defined by the first annular element, the second annular element, the first inner seal, and the second inner seal; a supply plenum (72A; 72B; 72C) disposed contiguous with an axial side of the damping chamber, wherein the supply plenum (72A; 72B; 72C) extends from the second inner seal to the first outer seal (94A; 94B; 94C); a fill port (146A; 146B; 146C) in fluid communication with the supply plenum (72A; 72B; 72C) and a source configured to supply a damping fluid; and a plurality of fluid passages (140; 140A) disposed in the first annular element; wherein the fluid damping structure is configured such that one or more of the fluid passages (140, 140A) is disposed in an open configuration when a local damping fluid pressure within the damping chamber is less than a local damping fluid pressure in an adjacent region of the supply plenum (72A; 72B; 72C), and the one or more of the fluid passages (140; 140A) is disposed in a closed configuration when the local damping fluid pressure within the damping chamber is greater than the local damping fluid pressure in the adjacent region of the supply plenum (72A; 72B; 72C); characterized in that the fluid damping structure further comprises: a ring disposed axially adjacent to the first and second annular elements; a second outer seal (96C; 96D), wherein the second outer seal (96C; 96D) forms a sealing interface between the ring and the first annular element; and a plenum formed between the ring and the second annular element, wherein the plenum is partially enclosed by the second outer seal (96C; 96D), and wherein the plenum is in fluid communication with the first inner seal. a ring disposed axially adjacent to the first and second annular elements; a second outer seal (96C; 96D), wherein the second outer seal (96C; 96D) forms a sealing interface between the ring and the first annular element; and a plenum formed between the ring and the second annular element, wherein the plenum is partially enclosed by the second outer seal (96C; 96D), and wherein the plenum is in fluid communication with the first inner seal.