以“克拉兹飓风”为例,多用途装甲车轮胎在变形支承面上随胎压变化而运动的数学模拟

�. Sklyarov, O. Shapovalov
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引用次数: 1

摘要

军用多用途装甲车辆的运动数学建模与民用车辆的运动建模相比具有显著的特点。因为军事装备的操作不仅提供了在普通道路上移动的能力,而且还提供了在道路外移动的能力。具有不同的车轮对路面的附着系数和路面上的滚动阻力系数。因此,为了改善驾驶条件和增加越野,建议对轮胎内的气压进行最优重新分配。在这种情况下运动的效率必须用现代数学仪器从理论上加以研究。这将允许提供多用途机动车辆在规定的操作条件下有效执行规定的任务水平,并以一定的比例提供其技术特性的最大程度的性能技术要求。本文的目的是创建一个数学装置,用于调节装甲车辆车轴之间的空气压力,车轮公式为8 ?8、在具有可变牵引力系数和车轮阻力的表面上移动时,增加多用途装甲车的通过性。多用途装甲车在变形支承表面上直线运动的数学模型及其运动特性(参考通过性指标)的确定是作者在著作中提出的汽车运动建模的基础。在建立多用途装甲车在变形轴承表面上运动的数学模型时,有必要制定一种计算方案,其中做出以下假设:?在同等基础上考虑了多用途装甲车的直线运动;? 左右舷条件相同;? 小车两侧各桥(轴)的轮轨完全重合;? 汽车侧面的地面表面特性是相同的;? 车轮与车身在垂直平面上的连接是刚性的(不考虑悬架的弹性特性);? 考虑了悬架导向元件的纵向柔性;? 发动机转矩直接影响车轮;? 未考虑传动元件的弹性阻尼特性;? 土壤变形不是由于其直接的物理特性而指定的,而是由于车轮在平坦表面上滚动时的比能量损失。考虑了悬架导向元件的纵向柔韧性;? 发动机转矩直接影响车轮;? 未考虑传动元件的弹性阻尼特性;? 土壤的变形不是由其直接的物理特性决定的,而是由车轮在平面上滚动时的比能量损失决定的;? 发动机对供油体位置变化的响应无延迟;? 发动机产生的扭矩的特性,以斜线的形式表示,其最大值由供油体位置变化的分数决定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
MATHEMATICAL SIMULATION OF MOVEMENT ON A DEFORMED SUPPORTING SURFACE WITH CHANGE OF TIRE PRESSURE IN WHEEL TIRES OF A MULTI-PURPOSE ARMORED VEHICLE IN THE EXAMPLE OF KrAZ �HURRICANE�
Mathematical modeling of the movement of multi-purpose armored vehicles for military purposes has significant features in contrast to the modeling of the movement of civilian vehicles. Because the operation of military equipment provides the ability to move not only on general roads, but also outside them. With different coefficients of adhesion of wheels to the road and coefficients of rolling resistance on the road. Therefore, to improve driving conditions and increase cross-country, it is advisable to carry out the optimal redistribution of air pressure in the tires. The efficiency of motion in such conditions must be theoretically investigated using a modern mathematical apparatus. That will allow providing for multipurpose motor vehicles effective performance of the set level of tasks in the specified operating conditions and at a certain ratio of its technical characteristics to provide the maximum degree of performance of technical requirements. The purpose of the article is to create a mathematical apparatus for regulating the air pressure between the axles of an armored vehicle with a wheel formula 8 ? 8, when moving on surfaces with variable coefficients of traction and wheel resistance, to increase the passability of a multi-purpose armored vehicle. The basis of the mathematical model of rectilinear motion of a multi-purpose armored vehicle on a deformed support surface and the determination of the characteristics of this movement (indicators of reference passability) is the modeling of the car movement proposed by the authors in the works. When developing a mathematical model of the movement of a multi-purpose armored vehicle on a deformed bearing surface, it is necessary to develop a calculation scheme in which the assumptions are made: ? the rectilinear movement of the multipurpose armored car on an equal basic basis is considered; ? left and starboard conditions are the same; ? wheel tracks of all bridges (axes) on the sides of the car completely coincide; ? the characteristics of the ground surface on the sides of the car are the same; ? the connection of the wheels with the car body in the vertical plane is rigid (without taking into account the elastic properties of the suspension); ? the longitudinal flexibility of the suspension guide elements is taken into account; ? the engine torque affects the wheel directly; ? elastic - damping properties of transmission elements are not taken into account; ? soil deformation is specified not because of its direct physical characteristics, but as specific energy losses during wheel rolling on a flat surface ? the longitudinal pliability of the guide elements of the suspension is taken into account; ? engine torque directly affects the wheel; ? elastic-damping properties of transmission elements are not taken into account; ? deformation of the soil is set not because of its direct physical characteristics, but as specific energy losses when rolling the wheel on a flat basis; ? engine response to a change in the position of the fuel supply body without delay; ? characteristic of the torque developed by the engine, taken in the form of an inclined line, the maximum value of which is determined by the fractions of the change in the position of the fuel supply body.
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