Abstract: As to the establishment of monolayer suspended grid in the stilling basin, the height of it has close connection with many factors, and under the condition of these influencing factors, it is difficult to quantify the influence law. Therefore, in this thesis, by means of π theorem of dimensional analysis, it has establishment on the height formula of suspended grid, puts forward and deduces 7 non-dimensional π theorems, and then, by means of nonlinear curve fitting, it can get the computational formula of height of suspended grid and predict the reserved test data, while the predicted value can be matched with the actual value within 10% error, so that it can get the conclusion that the computational formula of height of suspended grid is accurate to some extent, which can provide some references for practical engineering.

Key words: suspended grid, dimensional analysis, nonlinear curve fitting