When driving a tractor in the field, the operating strength and the physiological load of an operator differ greatly from the steering mechanisms.
驾驶拖拉机作业时，驾驶员的作业强度与生理负荷随着拖拉机的转向机构的不同而有较大的差别。
The model can be used to analyze the effects of tractor and soil strength parameters on tractor performance, It is a useful tool for optimizing tractor performance in the field.
该模型可用来模拟田间试验、研究土壤强度和拖拉机参数对拖拉机作业性能的影响，对拖拉机使用性能的研究将起到一定的作用。
Results the finite element model of NTMA tractor for CAD was set up, which could predict the strength and displacement of every node and element of its own structure in the course of deforming.
结果建立了用于计算机辅助设计的镍钛记忆合金牵引器有限元模型，可以预测一定形状的牵引器在变形过程中(各时段)其本身结构中各节点、单元的受力、位移情况。
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