基于SPH法的船式拖拉机叶轮单轮叶驱动性能研究
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摘要
叶轮是船式拖拉机独特的行走驱动装置,其设计参数对驱动性能和作业效率具有很大影响。为此,以课题组前期研发的HH709S型船式拖拉机叶轮为研究对象,采用光滑粒子流体动力学法,建立了轮叶-土壤的动力学仿真模型,并在此基础上对单轮叶与土壤的作业过程进行了分析。通过分析不同结构参数下单轮叶推进力做功及驱动效率的变化规律,为轮叶结构参数优化设计提供依据。研究结果表明:单轮叶结构优化后最大支撑力减小了3.83%,最大推进力提升了9.66%,推进力做功提升了13.72%,驱动效率提升了20. 35%,驱动性能得到了显著提高。
The lugged driving wheel is the unique walking structure of a boat-tractor,the design parameters of which have significant impacts on the driving performance and working efficiency of boat-tractor. In this paper,the object is the driving wheel of HH709 S boat-tractor,and the dynamic simulation model of lug-soil was established based on the smoothed particle hydrodynamics( SPH). Then,the driving performance and working efficiency of the single lug was analyzed. By calculating the driving efficiency and work of pull force of the single lug in different structural parameters,the guide for optimizing the parameters of the lug structure can be obtained. Results showed that the maximum lift force of the single lug reduced by 3. 83%,the maximum pull force increased by 9. 66%,the working of pull force increased by13.72%,and the driving efficiency increased by 20.35%,the driving performance was improved significantly.
The lugged driving wheel is the unique walking structure of a boat-tractor,the design parameters of which have significant impacts on the driving performance and working efficiency of boat-tractor. In this paper,the object is the driving wheel of HH709 S boat-tractor,and the dynamic simulation model of lug-soil was established based on the smoothed particle hydrodynamics( SPH). Then,the driving performance and working efficiency of the single lug was analyzed. By calculating the driving efficiency and work of pull force of the single lug in different structural parameters,the guide for optimizing the parameters of the lug structure can be obtained. Results showed that the maximum lift force of the single lug reduced by 3. 83%,the maximum pull force increased by 9. 66%,the working of pull force increased by13.72%,and the driving efficiency increased by 20.35%,the driving performance was improved significantly.
引文
[1]曹卫华.船式耕作机械驱动性能研究[D].长沙:湖南农业大学,2009.
[2]陈秉聪,赵玉璠.浮式水田拖拉机驱动叶轮的研究[J].农业机械学报,1983,14(3):1-12.
[3]邵耀坚.叶轮运动学和轮叶设计理论的探讨[J].农业机械学报,1964,7(1):1-18.
[4]邵耀坚.水田叶轮轮叶驱动面几何形状参数分析[J].农业机械学报,1981(1):103-104.
[5]陆华忠,邵耀坚.水田叶轮单轮叶动力性能的试验研究[J].农业工程学报,1995,11(1):65-70.
[6] Gee-Clough D,Chancellor WP. Pull and lift characteristics of single lug of rigid wheels in wet rice soils[J].Transactions of The American Society of Agricultural Engineers,1976,19(3):33-41.
[7] Hermawan W,Yamazaki M,Oida A.Theoretical analysis of soil reaction on a lug of the movable lug cage wheel[J].Journal of Terramechanics,2000,37(2):65-86.
[8] Fajardo A L,Suministrado D C,Peralta E K,et al. Force and puddling characteristics of the tilling wheel of float-assisted tillers at different lug angle and shaft speed[J]. Soil and Tillage Research,2014,140:118-125.
[9]陆华忠,罗锡文.水田驱动叶轮轮叶下土壤流动特性与动力性能研究[J].农业机械学报,2010,41(7):50-53.
[10] Lucy L B. A numerical approach to the testing of the fission hypothesis[J].The Astronomical Journal,1977,82:1013-1024.
[11] Gingold R A,Monaghan J J.Smoothed particle hydrodynamics:theory and application to non-spherical stars[J].Monthly Notices of The Royal Astronomical Society,1977,18l(3):375-389.
[12]黄雨,郝亮,谢攀,等.土体流动大变形的SPH数值模拟[J].岩土工程学报,2009,31(10):1520-1523.
[13] Libersky L D,Petscheck A G. High strain Lagrangian hydrodynamics:A three dimension SPH code for dynamics material response[J]. Journal of Computational Physics,1993,92,1054.
[14]胡德安,韩旭,肖毅华,等.光滑粒子法及其与有限元耦合算法的研究进展[J].力学学报,2013,45(9):639-652.
[15] Lewis B A. Manual for LS-DYNA Soil Material Model 147,Mclean,V A[R]. USA:Federal Highway Administration Research and Development Turner-Fairbank Highway Research Center,2004.
[16]杨望,路宏,杨坚,等.微耕机水田旋耕刀片切土作业过程动力学仿真[J].农机化研究,2016,38(6):74-77.
[17]杨望,杨坚,贾丰云,等.种植于红粘土的木薯块根挖掘作业数值模拟[J].机械工程学报,2013,49(9):135-143.
[18]龙俞文.船式拖拉机行走机构对牵引性能影响的研究[D].南昌:江西农业大学,2013.
[2]陈秉聪,赵玉璠.浮式水田拖拉机驱动叶轮的研究[J].农业机械学报,1983,14(3):1-12.
[3]邵耀坚.叶轮运动学和轮叶设计理论的探讨[J].农业机械学报,1964,7(1):1-18.
[4]邵耀坚.水田叶轮轮叶驱动面几何形状参数分析[J].农业机械学报,1981(1):103-104.
[5]陆华忠,邵耀坚.水田叶轮单轮叶动力性能的试验研究[J].农业工程学报,1995,11(1):65-70.
[6] Gee-Clough D,Chancellor WP. Pull and lift characteristics of single lug of rigid wheels in wet rice soils[J].Transactions of The American Society of Agricultural Engineers,1976,19(3):33-41.
[7] Hermawan W,Yamazaki M,Oida A.Theoretical analysis of soil reaction on a lug of the movable lug cage wheel[J].Journal of Terramechanics,2000,37(2):65-86.
[8] Fajardo A L,Suministrado D C,Peralta E K,et al. Force and puddling characteristics of the tilling wheel of float-assisted tillers at different lug angle and shaft speed[J]. Soil and Tillage Research,2014,140:118-125.
[9]陆华忠,罗锡文.水田驱动叶轮轮叶下土壤流动特性与动力性能研究[J].农业机械学报,2010,41(7):50-53.
[10] Lucy L B. A numerical approach to the testing of the fission hypothesis[J].The Astronomical Journal,1977,82:1013-1024.
[11] Gingold R A,Monaghan J J.Smoothed particle hydrodynamics:theory and application to non-spherical stars[J].Monthly Notices of The Royal Astronomical Society,1977,18l(3):375-389.
[12]黄雨,郝亮,谢攀,等.土体流动大变形的SPH数值模拟[J].岩土工程学报,2009,31(10):1520-1523.
[13] Libersky L D,Petscheck A G. High strain Lagrangian hydrodynamics:A three dimension SPH code for dynamics material response[J]. Journal of Computational Physics,1993,92,1054.
[14]胡德安,韩旭,肖毅华,等.光滑粒子法及其与有限元耦合算法的研究进展[J].力学学报,2013,45(9):639-652.
[15] Lewis B A. Manual for LS-DYNA Soil Material Model 147,Mclean,V A[R]. USA:Federal Highway Administration Research and Development Turner-Fairbank Highway Research Center,2004.
[16]杨望,路宏,杨坚,等.微耕机水田旋耕刀片切土作业过程动力学仿真[J].农机化研究,2016,38(6):74-77.
[17]杨望,杨坚,贾丰云,等.种植于红粘土的木薯块根挖掘作业数值模拟[J].机械工程学报,2013,49(9):135-143.
[18]龙俞文.船式拖拉机行走机构对牵引性能影响的研究[D].南昌:江西农业大学,2013.
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