A new type of flexible temperature-control curtain for low-temperature water treatment and nonlinear structural analysis method

The water temperature of the deep dam reservoir is stratified in the vertical direction, which causes the water to have low temperatures at the intake throughout the year. The outflow of low-temperature water will bring problems into the ecological environment. Temperature-control curtain (TCC) is a treatment method for this problem with a low cost and simple structure. This paper presents and analyzes the new flexible TCC from the perspective of structural design and mechanical analysis. First, this paper presents the main mechanical components and the force transferring path of the new flexible TCC. Taking into account the deformations, stress, stability and construction convenience of the structure, three types of cable-net layout schemes have been proposed, namely the Plane TCC, the Elliptic Paraboloid TCC and the Conical Surface TCC. Then, a nonlinear structural analysis method based on the Vector Form Intrinsic Finite Element is proposed for the form evolution and internal force change of the TCC structure under the influence of water pressure. Finally, the mechanical properties of different schemes are also evaluated and compared. This provides a feasible analysis method and a preliminary scheme for practical engineering design.