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| 振动挖掘铲减阻数值模拟及参数优化 |
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石林榕1, 孙伟1, 赵武云1, 孙步功1, 王蒂2, 张俊莲2, 刘全威3, 吴建民1
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| (1.甘肃农业大学 工学院, 兰州 730070;2.甘肃农业大学 农学院, 兰州 730070;3.中国农业大学 工学院, 北京 100083) |
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| 摘要: |
| 对小型振筛式马铃薯挖掘机振动挖掘铲的性能参数进行优化，借助Adams和Ls-Dyna相结合法模拟振动挖掘铲挖削土壤过程，据4因素3水平响应曲面法试验设计原理对影响挖掘铲挖削阻力的因素进行了多因素方差分析，并建立和优化了回归模型。结果表明：影响牵引阻力的因素由大到小依次为振动频率、牵引速率、入土角、振幅；当牵引速率为0.67 m/s、振动频率13.77 Hz、振动幅值11.93 mm、入土角8.35°时，优化牵引阻力为1 449.59 N。田间验证试验结果表明：试验阻力平均值与仿真结果误差<5%，说明回归模型能较好的反映振动频率、牵引速率、入土角、振幅于牵引阻力之间的关系。 |
| 关键词: 马铃薯 挖掘铲 振动减阻 数值模拟 参数优化 |
| DOI：10.11841/j.issn.1007-4333.2014.02.27 |
| 投稿时间：2013-07-23 |
| 基金项目:甘肃省重大专项（1102NKDM025）；国家科技支撑计划课题（2012BAD06B03） |
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| Numerical simulation of vibration digging shovel in drag reduction and parameter optimization |
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SHI Lin-rong1, SUN Wei1, ZHAO Wu-yun1, SUN Bu-gong1, WANG Di2, ZHANG Jun-lian2, LIU Quan-wei3, WU Jian-ming1
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| (1.College of Engineering, Gansu Agricultural University, Lanzhou 730070, China;2.College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;3.College of Engineering, China Agricultural University, Beijing 100083, China) |
| Abstract: |
| In order to optimize the performance of a small vibrating sieve potato digger,a simulation with Ls-Dyna and Adams for the soil cutting process of the vibration digging shovel was conduced.Basing on Box-Behnken response surface analysis principle,a 4 factors and 3 levels test was designed for the variance analysis.The results showed that factors affecting traction resistance in descending order were vibration frequency,forward speed,cutting angle and amplitude of the digger.According to the optimized regression model,the traction resistance would be 1449.59 N when the traction rate was 0.67 m/s,the vibration frequency was 13.77 Hz,the vibration amplitude was 11.93 mm and cutting angle was 8.35°.Comparing the field test and simulation,the difference of them was less than 5%,which meant the model simulation could impersonate the real digger work in an acceptable level. |
| Key words: potato digging shovel drag reduction in vibration numerical simulation parameter optimization |
