Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (4): 814-823.DOI: 10.3969/j.issn.1004-1524.2022.04.18

• Biosystems Engineening • Previous Articles     Next Articles

Calibration of parameters of black soldier fly in discrete method simulation based on response angle of particle heap

PENG Caiwang(), ZHOU Ting, SUN Songlin(), XIE Yelin, WEI Yuan   

  1. College of Mechanical and Electrical Engineering, Hunan Agricultural University, Changsha 410128, China
  • Received:2020-10-23 Online:2022-04-25 Published:2022-04-28
  • Contact: SUN Songlin

Abstract:

Black soldier fly plays an important role in reducing the cost of livestock and poultry manure discharge and farm pollution. However, black soldier fly separation was a difficult procedure for the follow-up comprehensive utilization of livestock manure. The parameters of discrete element model for black soldier fly was important for black soldier fly separation based on EDEM simulation software. A method was proposed to calibrate the parameters of discrete element model for black soldier fly based on tests of the angle of repose. Firstly, the “Hertz-Mindlin with JKR” contact model in the system was selected and the angle of repose was taken as the evaluation index to calibrate the parameters for the discrete element simulation model of the black soldier fly. Secondly, it was found that not all discrete element model parameters of black soldier fly had significant impact on the angle of repose, only three parameters (shear modulus, static friction coefficient and rolling friction coefficient of the black soldier fly) that had significant influence on the accumulation of the black soldier fly were selected by Plackett-Burman design test. Then, the best range of three significant influencing factors was determined by the steepest climbing test, the other seven factors in this test were the intermediate values of the initial range, and the three significant parameters gradually were increased and decreased until the relative error between the simulated value and the physical test value reached the minimum. Finally, the accumulation angle of black soldier fly was taken as the response value, quadratic regression orthogonal rotation combination test was used, and the repose angle regression model was obtained. The regression model was optimized, and the optimal values of three significant factors were obtained: black soldier fly shear modulus was 8.67 MPa, static friction coefficient was 0.43, rolling friction coefficient was 0.32. By using the optimal parameter combination for simulation analysis, the mean value of the accumulation angle was 35.84°, the physical test was 34.66°, the relative error between them was 3.40%. The results showed that this method was feasible for the calibration of discrete element simulation parameters of the black soldier fly, which provided a basis for material characteristics data for the design and research of screening machinery of the black soldier fly based on EDEM software.

Key words: black soldier fly, accumulation angle, parameter calibration, response surface methodology, discrete element

CLC Number: