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汽车在接近侧滑极限状态下的转向特性是与汽车发生甩尾激转等安全事故有密切关系的重要而又复杂的问题。本文通过9自由度、47变元的数学力学模型,63个基本的结构参数与使用参数,以及31个补充描述参数,充分考虑各个环节的互相影响和非线性特性,对各种结构的汽车在各种使用条件下的全范围的稳态转向特性作尽量详细的模拟研究。介绍了QYHS792模拟程序的特点和基本内容。通过模拟实例对与汽车甩尾有关的一些现象以及改变结构参数的效果作了理论上的解释。
Steering characteristics of the car near the limit state of skidding are important and complicated issues that are closely related to safety accidents such as swerving of the car. In this paper, through the nine degrees of freedom, 47 variables mathematical mechanics model, 63 basic structural parameters and the use of parameters, and 31 additional description parameters, give full consideration to each link of the mutual influence and nonlinear characteristics of various structures of the car in the Various conditions of use under the full range of steady-state steering characteristics for detailed simulation studies. The characteristics and basic contents of QYHS792 simulation program are introduced. Through the simulation examples, some explanations about some phenomena related to automobile tail-flicking and the effect of changing structural parameters are given.