Similarity Criterion of Wind Sand Test and Its Application Research

Abstract

Based on the deformation theory, wear theory and similarity theory, the similarity relations of the various factors influencing the sand erosion phenomenon between in laboratory simulation working condition and in actual working condition were analyzed, and the similarity criterion of the wind sand test was proposed. In order to ensure a mutual conversion between the erosion damages of the engineering materials in the actual wind and sand environment and that in the laboratory simulation environment, this criterion restricted the numerical relations of the various parameters of the wind and sand environment between in actual and laboratory simulation working conditions. By adjusting the proportional relations of the sand - dust concentrations as well as the erosion speeds between in laboratory simulation and actual working conditions, the test speed was controlled and accelerated. Based on this criterion, the values of various parameters in the laboratory simulation wind and sand test could be designed, and the damage degree of engineering materials in the actual wind and sand environment in central and western Inner Mongolia could be predicted through the test mentioned above. The wind and sand test similarity criterion provided a theoretical basis and a basis for parameter selection for evaluating the erosion damage of engineering materials in a wind and sand environment by means of a simulation test.

Keywords

• wind and sand environment|engineering materials|erosion damage|similarity criterion