搜索结果: 1-6 共查到“农业工程 machinery”相关记录6条 . 查询时间(0.067 秒)
Silage-corn harvesting machinery traffi c eff ects on soil bulk density and water permeability
repeated traffi c passes silage harvester soil compaction soil physical damage soil porosity
2014/2/24
Soil compaction caused by machinery traffi c aff ects the growth of agricultural crops and also has environmental eff ects
like soil damage and erosion. Field experiments were cond...
混合模式下的农业机械载荷谱数据管理系统（Realization of Load Spectrum Data Management System for Typical Agricultural Machinery Based on Hybrid Model）
典型农业机械 载荷谱数据库 混合模式
2009/11/24
以拖拉机、联合收获机等典型农业机械载荷谱数据库建设工作为背景，基于B/S与C/S混合模式，利用.NET技术体系设计与实现载荷谱数据库信息管理系统。针对实际情况和工程应用的具体需求制定了系统的总体方案，设计了系统的结构模型，最后完成系统具体模块的开发调试。系统可实现载荷谱数据现代化管理、增加信息沟通渠道、提高结构疲劳寿命研究工作的效率。
旋转机械碰摩转子系统的可靠性灵敏度设计（Reliability Sensitivity Design for Rub-impact Rotor System of Rotating Machinery）
转子系统 随机摄动 可靠性
2009/8/11
在碰摩转子系统动力学方程的基础上，将可靠性设计理论与灵敏度分析方法相结合，应用随机摄动理论、Kronecker代数、四阶矩技术和矩阵微分理论，讨论了具有随机参数的转子系统碰摩的可靠性灵敏度问题，提出了转子系统可靠性灵敏度设计的数值方法，给出了碰摩转子系统随机参数统计特性可靠性灵敏度的变化规律，研究了转子系统随机参数统计特性的改变对碰摩转子系统可靠性的影响，为转子系统的可靠性设计提供了理论依据。数值...
轮胎压实对机具牵引阻力的影响（Effect of Wheel Traffic on Working Resistance of Agricultural Machinery in Field Operation）
保护性耕作 固定道 压实 牵引阻力
2010/2/26
研究了华北平原小麦、玉米一年两熟区固定道保护性耕作对机具田间牵引阻力的影响，对比分析了固定道与非固定道处理下机具田间作业的滚动阻力、开沟器牵引阻力和总牵引阻力。与非固定道保护性耕作时深松、小麦和玉米播种作业相比，固定道保护性耕作下机组总牵引阻力分别降低14.6%、13.3%和13.3%；滚动阻力分别降低26.9%、21.9%和19.7%，平均降低22.9%；机具牵引阻力分别降低7.5%、7.2%和...
Testing stands for laboratory tests of hydrostatic pumps of agricultural machinery
cyclic pressure loading durability test flow characteristics gear pump hydrostatic circuit
2014/2/27
In this paper, a design of testing stands for the durability tests of hydrostatic pumps of agricultural tractors is presented. The designed testing stands will be used for the laboratory verification ...
Measuring of pulling resistance in machinery with passive working organs
tillage disk harrow measuring equipment field experiments
2014/2/27
A determination of the total pulling resistance of machinery is important in light of its dimensioning as well in light of energy requirements of processed operation. There are several methods to dete...