EXPERIMENTAL RESEARCH OF MECHANICAL MODEL OF AN ELASTIC WHEEL
Journal Title: Автомобильный транспорт - Year 2019, Vol 44, Issue
Abstract
Problem. At present, the prevailing view is that the total circumferential force of the wheel is equal to the quotient of torque by the loaded radius of the wheel. However, works are known in which it is stat-ed that the torque should be divided not by the loaded radius, but by the rolling radius without slid-ing. But these radii differ in their definitions, physi-cal meaning, numerical values, and even units of measurement. In wheels with elastic low pressure tires, the radius of rolling and the dynamic radius can vary by 25 %. Under conditions of such uncer-tainty, the theory of rolling elastic wheels cannot claim to be reliable for the results it provides. They can always be challenged by opposing significantly different results. Goal. The aim of the work is to ex-perimentally test the hypothesis that the relationship between torque and the total circumferential force of an elastic wheel is determined by rolling radius without sliding. Methodology. The experiments were carried out on a mechanical model of an elastic wheel, the loaded radius of which could differ by ± 30 % from the rolling radius. Results, originality, practical significance. It has been established that a change in the dynamic radius does not completely affect the total circumferential force of the wheel. It depends on the rolling radius, the use of which en-sures compliance with the law of conservation of energy. Therefore, the prevailing opinion today about the decisive role of the loaded radius is false. Even in the case of coincidence of values of radius of rolling and loaded radius, it should be noted that the radius of rolling is used, and not loaded. Ignor-ing this circumstance will constitute a fundamental methodological inaccuracy, meaning the neglect of the law of conservation of energy.
Authors and Affiliations
S. Pozhydaev, H. Shkarovskyy
INTEGRATED TECHNOLOGY OF GASOTHERMAL EVAPORATION COATINGS AND METHOD ELECTROSPARK LEGION
The possibility of preparation of surfaces deposition by spraying with hardness more than HRC 40 by means of gasothermal method of electrospark legion is peslarched. The mathematical modelsof mass deposition depending o...
РЕЗОНАНСНІ КОЛИВАННЯ РОТОРА НА ШАРИКОПІДШИПНИКАХ З ОСЬОВИМ НАТЯГОМ ПРИ СПІЛЬНІЙ ДІЇ ДИСБАЛАНСУ І ВІБРАЦІЇ ОПОР
Отримано модель нелінійних коливань ротора на радіально-упорних шарикопідшипниках з попереднім осьовим натягом. Методом продовження по параметру отримано амп-літудно-частотну характеристику системи при спільній дії дисба...
ПРОГРАМА З АВТОМАТИЗОВАНОГО РОЗРАХУНКУ НЕЖОРСТКИХ ДОРОЖНІХ ОДЯГІВ УКРРДО 15
Розглянуто програму для автоматизованого розрахунку нежорстких дорожніх одягів УКРРДО 15. Детально розглянуто інтерфейс програми, компоновка вихідних даних та результатів розрахунків. Розрахунки проведено за трьома крите...
ИСПОЛЬЗОВАНИЕ СЦЕПНОГО ВЕСА И РАЦИОНАЛЬНОЕ РАСПРЕДЕЛЕНИЕ ТОРМОЗНЫХ СИЛ МЕЖДУ ОСЯМИ КОЛЕСНЫХ МАШ
Определены зависимости для коэффициента использования сцепного веса двухосных колесных машин при торможении и определен рациональный коэффициент распределения тормозной силы на переднюю ось по условию максимального испол...
DETERMINATION OF CHARACTERISTICS OF HYDROGEN IN VEHICLE TANK AT TEMPERATURE RANGE OF 20 – 32 K
The analytical dependence of density, volume andenthalpy of gaseous and liquid hydrogen in the tank on tank volume, mass and temperature of stored hydrogen (in the range 20–32 K).