http://vestnik.donstu.ru Вестник Донского государственного технического университета МАШИНОСТРОЕНИЕ И МАШИНОВЕДЕНИЕ MACHINE BUILDING AND MACHINE SCIENCE УДК 631.517:631.415.330.138.1 Integration of Reliability Concept into Soil Tillage Machine Design* Ghias Kharmanda1 , Imad Antypas2** 1Lund University, Lund, Sweden 2Don State Technical University, Rostov-on-Don, Russian Federation Интеграция концепции надежности в проектирование почвообрабатывающих машин*** Харманда Мухамад Гиас1, Антибас Имад Ризакалла2** 1Лундский университет, г. <...> Ростов-на-Дону, Российская Федерация The main interest of designers is not only to determine the amplitudes of tillage forces but also the in achieving type of their distributions under different soil mechanical properties with object of achieving reliable designs. <...> Whereas, the deterministic design approach consists designs without considering the randomness of the design parameters that may lead to non reliable designs. <...> In this work, we establish a statistical study on the randomness of the soil properties in collaboration with Cranfield University. <...> This new study can be considered as a useful database for agricultural equipment design fields. <...> Here, we take into account the uncertainties of soil mechanical properties that have big effects on tillage forces. <...> The tillage forces are calculated in accordance with analytical model of McKyes and Ali with some modifications to include the effect of both soil-metal adhesion and tool speed. <...> The distributions of soil-tool forces are next established to design soil tillage equipments such as shank chisel plow. <...> The reliability index is then calculated using two deferent methods (Monte Carlo method and Hasofer and Lind approach). <...> The Hasofer and Lind approach provides the structural reliability level with a low computing time relative to the Monte Carlo approach. <...> Keywords: probabilistic index, soil-tillage forces. design, reliable design, reliability Основной интерес конструкторов состоит не только в определении амплитуды сил, возникающих при обработке почвы, но и в их распределении при различных механических свойствах почвы с целью достижения надёжности конструкции. <...> Ключевые слова: вероятностный дизайн, надежность конструкции, показатель надежности, почвообрабатывающие силы. 1- Introduction Accurate prediction of soil-tool forces is of great value to the designers of soil tillage equipments [1 <...>