基于NASTRAN的玉米播种机机架振动有限元模态分析
Finite Element Modal Analysis of Vibration for Mountain Miniature Corn Planter Frame Based on NASTRAN
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摘要: 为了解决玉米播种机机架在播种过程中产生复杂振动变形而影响播种株距均匀性的问题,以自主研发的2BFQ2型山地小型玉米播种机为研究对象,用UGNX75软件建立机架的三维模型和有限元模型,然后应用NASTRAN求解器分析机架的各阶模态,最后计算出机架的固有频率、总振幅和主振型,并输出各阶频率位移云图。该研究结果为机架后续的设计和减振分析提供了理论依据,对稳态播种和提高播种株距的均匀性具有重要的理论意义。Abstract: Frame of mountain miniature corn planter has complex vibration deformation issues while sowing,and this issue should seriously decrease uniformity of plant spacing.Taking the 2BFQ2 type mountain miniature corn planter,independently developed by our institution,as the research object,3D model and finite element model of the frame was built based on UGNX75,and modals of frame were analyzed by using NASTRAN solver.Finally,natural frequency,total amplitude and main vibration mode were calculated,and then output cloud picture of displacement of each natural frequency.Results provide theoretical basis for frame subsequent designation and vibration reduction,and it is important to enhancing the uniformity of plant spacing and the sowing stability.
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Keywords:
- Frame /
- Finite element modal analysis /
- Vibration /
- NASTRAN
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