Application and Comparsion of Mathematical and Physical Models on Inspecting Slab of Stilling Basin Floor under Static and Dynamic Forces

Abstract

To protect downstream of hydraulic structures against erosion and degradation, must dipress water energy. one of the most comon methods to achive this purpose is constructing the stilling basin at the downstream of such structures. In stilling basin, the water energy dissipated by taking place of hydraulic jump. When a hydraulic jump occurs, the hydrodynamic and hydrostatic forces effect on the stilling basin floor slab. These forces include the force due to water weight and the up lift force affected the slab below which these forces are classified in hydrostatic. also the other force is hydrodynamic force due to pressure fluctions below the hydraulic jump. To keep the stilling basin stabillity from liffting up and destruction must the resistant forces be equal to destroyer forces. In this study after discution about the hydraulic jump and its resultant forces, a equation has been offerd to determine the thickness of stilling basin floor slab using buckingham theory andsoftware DATAFIT. Finaly the slab which evaluated by physical model, simulated using mathematical model(software ANSYS 10) and studied. The stress and strain diagrams were extracted. Results showed that physical and mathematical models were matched very good.

Manufacturing ZrB2–SiC–TaC Composite: Potential Application for Aircraft Wing Assessed by Frequency Analysis through Finite Element Model

“…Thereafter, to visualize the practical application of the presented manufactured composite, it was adopted for the aerospace applications. For this aim, the finite element (FE) method which has been frequently used as an outstanding tool for a wide range of applications such as modeling materials, and structural and mechanical components, vibration analysis, buckling analysis, crack propagation, and blast analysis of structures and materials, was taken into account [50][51][52][53][54][55][56][57][58][59][60]. In this regard, the FE package ABAQUS was adopted to evaluate the natural frequencies of an aircraft wing of aluminum 2024-T3 and the leading edge made of the ZrB 2 -SiC-TaC.…”

SMA bending bars as self-centering and damping devices

“…In the history of civil engineering structures, reinforcements such as fibers and bars have been popularly used to enhance the structural resistance and performance against external loads and destructive environmental factors [1][2][3][4][5]. For decades the steel and cement were employed for structures and devices, however, among all structural materials, shape memory alloys (SMAs) have attracted many attentions in last decade because of their two superior properties; the pseudoelasticity (SE) and shape memory effect (SME), originating from austenite-martensite phase transformation [6][7][8][9][10][11][12]. To enhance the properties and performance of the SMA, the annealing process can be employed [13,14].…”