查询词典 tractor

The objective of this thesis is to develop an integrated test and analysis system for tractor drawbar and noise.

本论文的目的在于研制一种集成化的拖拉机牵引和噪声测试分析系统。

Based on this study, an integrated test and analysis system for tractor drawbar and noise is developed.

基于以上研究，研制了集成化的拖拉机牵引和噪声测试分析系统。

Tractor drawbar and noise test play an important role in theoretical study, performance analysis, quality appraisal of tractors.

拖拉机牵引和噪声试验是对拖拉机进行理论研究、性能分析以及对新产品作定型鉴定的最主要试验项目。

Farm implements can be attached to the rear of the tractor by either a drawbar or by a three-point hitch .

应用农机具通过挂钩或三点式悬挂机构连接在拖拉机上，三点式悬挂机构是由亨利。

In this thesis, several key techniques used for the tractor drawbar and noise measuring system, i.e., parallel port communication interface techniques, high-accuracy wide-range speed measurement techniques and noise analysis approaches are studied.

文中采用了一些关键技术，如并行口通信接口技术、高精度宽量程的测速技术以及噪声分析方法等。

The drawgear of the tractor-trailer combinations has been designed by means of flexible drawing technique.

在此基础上，对挂接车辆的柔性牵引装置进行了总体结构设计，并对其中的弹簧～阻尼器单元进行了技术设计。

It could be concluded that the drawing performance and the riding comfort of the tractor-trailer combinations would been improved obviously when the optimized flexible drawgear was used.

同时发现使用经过优化设计的柔性牵引装置后不但大幅度降低了牵引架上动态纵向力的峰值，因而明显改善了挂接车辆在非平稳道路离散事件激励条件下运行时的牵引运行状况和纵向平顺性状况

Consequently the using of the flexible drawgear can improve the drawing status and the riding comfort conditions of the tractor-trailer combinations greatly under the condition of stationary random excitation.

因此使用柔性牵引装置后大大改善了挂接车辆在平稳随机路面激励状况下的牵引运行状况和纵向平顺性状况

Considering the mean square of the dynamics longitudinal force on the drawgear as an object function, and considering the rigid impact probability as a constraint condition, the optimizing software named TTCFDOS (Tractor-Trailer Combinations Flexible Drawing Optimization System) has been developed.

在对上述确定性参数系统进行频域分析的基础上，以牵引架上动态纵向力的均方值为评价指标和目标函数，以刚性冲击概率为约束条件，开发了挂接车辆柔性牵引优化设计软件系统TTCFDOS，对挂接车辆的柔性牵引参数进行了优化设计，获得了与挂接车辆经常行驶工况相对应的优化柔性牵引参数

Under the condition of running on the hard soil pavement with the total train mass, the riding comfort tests of the tractor-trailer combinations with the stiff and the flexible drawgear have been performed, and the dynamics longitudinal force has been studied. When the flexible drawgear was used, the theoretical results and the experimental data showed that the peak value of the dynamics longitudinal force, the peak value of the RMS of the dynamics longitudinal force, and the PSD both of the dynamics longitudinal force and of the longitudinal acceleration decreased largely.

以平稳随机路面激励状况下满载行驶作为挂接车辆的经常行驶工况，进行了挂接车辆以刚性牵引架及不同柔性牵引参数的柔性牵引装置牵引运行时的平顺性试验，柔性牵引理论分析结果与试验结果均表明，使用柔性牵引参数值接近优化值的柔性牵引装置后，动态纵向牵引力的峰值、功率谱密度峰值及均方根值均有了大幅度的降低；主车和挂车的纵向振动加速度功率谱峰值也有了很大的降低。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。