MÔ HÌNH HÓA VÀ MÔ PHỎNG DAO ĐỘNG CỦA XE TẢI HAI CẦU KHI CHẠY TRÊN MẶT ĐƯỜNG NGẪU NHIÊN

Abstract

The paper used the method of splitting the structure of the multi-body system and the Newton-Euler equations to build a model and set up a system of dynamic equations of a two-axle truck. The authors used Matlab-Simulink software to survey the vibrations of a two-axle truck when running on random pavement according to ISO 8608:2016 at speed V= [30 ÷ 80] km/h. Research results show that when a fully loaded two-axle truck runs on random pavements of grades B and C at a speed of V = [30÷80] km/h, the minimum dynamic load factor is greater than 0.5; the maximum dynamic load factor is less than 1.5 and the vehicle body vibration acceleration is less than 3m/s2, so the truck vibration meets the requirements of ISO 2631-1:1997. When the truck is traveling at a speed greater than 50km/h (on type D road surface) or at a speed greater than 40km/h (on class E road surface), the minimum dynamic load factor is less than 0.5 and the vehicle body vibration acceleration is greater than 3m/s2, so the truck vibration exceeds the allowable limit of ISO 2631-1:1997, the vehicle does not guarantee the smoothness of movement, the dynamic safety and durability.