| Our freshwater resources are currently available not only effective,but utilization is also low,polluted and warming caused by the greenhouse effect,resulting in below normal rainfall combination of factors,seriously hamper the development of China's economy,the largest of which agricultural water used,conservation and control are very essential therefore can be performed on agricultural water.In this paper,with reference to the market-related parameters of translated sprinkling machine,the design of a large span translated irrigation machine,according to research purposes,either to reduce the occupied area of farmland irrigation machine translation,to maximize the use of land,but also to ensure the uniformity of crop irrigation,increase production,and save water resources.This paper will use CATIA software to design three dimensional modeling which a large-span sprinkling machine structural parameters of structural stability analysis to ensure a large-span structure design to meet the design requirements.By ANSYS FLOTRAN software to structure of large-span sprinkling machine will be simplified with the mesh,and using its own fluid simulation software ANSYS FLOTRAN pipeline fluid simulation analysis,flow rate at the inlet certain circumstances,each outlet relations between the velocity distribution.Experimental prototype in the field of five test groups to testing,the resulting distribution of water,irrigation water depth data to analysis are calculated based on the calculated results to determine the design of large span translation sprinkler irrigation uniformity Meets "Irrigation engineering design specifications" requirement.Contents of this paper are as follows:(1)The status of freshwater resources and the significance of the development of agriculture sprinkler irrigation,and domestic and foreign research and test methods for translation sprinkler machine irrigation uniformity of structure and other aspects of the analysis.(2)Research and compare various modeling of three-dimensional model,the paper chooses CATIA software to model the large-span translation irrigation machine,and analyzes its working principle,structure,mode of operation and obtains to various parts of the structure size parameters,organize and remove redundant parameters,to facilitate the establishment of the model.(3)The use of CATIA software,to finite element analysis,unit setup,mesh,otherloads and constraints imposed on the large-span translation irrigation machine which across the whole body and structural stability were analyzed and the corresponding results obtained proposed structure optimization tips.(4)Refer to the relevant literature and standards,and summarized translation impact of large-span sprinkler irrigation uniformity factor by calculation and analysis,fluid analysis to determine the relevant parameters,including the inlet pressure,flow rate,emitter selection,emitter spacing parameter.(5)Using ANSYS FLOTRAN software to simplifies structures of large-span translation irrigation machine.Meshing pipes were cross-body hydrodynamics simulations to determine the large-span translation irrigation machine which the relationship between of job stress,emitter operating pressure,speed,and flow,etc.(6)The experimental prototype testing in the field trials,collected and organized testing data to calculate the irrigation uniformity coefficient span translation irrigation machine,and then with ANSYS FLOTRAN simulation data are compared to determine the large-span sprinkler irrigation uniformity performance meet the design requirements under the corresponding emitter spacing,sprinkler operating pressure,inlet flow rate and other parameters.The main innovation of this paper is as follows:(1)By reference to market-related entity machine parameters to determine the structure of large-span sprinkling machine design parameters and three-dimensional modeling,using of CATIA software prototype assembly and using of their finite element analysis for structural stability analysis,in order to verify the design reliability of the large-span translation irrigation machine,provide a theoretical basis for the future market to product.(2)Research on the design of large-span translation sprinkler irrigation uniformity in case emitter spacing of 2.9m,fluid simulation analysis and field testing to determine the impact of different design working pressure of the inlet of the irrigation uniformity,the large-span translation irrigation machine from further research and development is important. |
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