Özet:

Conceptual design steps of a 4.5 metric tonnes capacity, trailing arm-type independent suspension system, which will be applied to special type semi-trailers suitable for the transport of glass and other sensitive loads, are summarized. In the first phase of the work, the design volume of the suspension system is determined, by taking the total working stroke of the wheel into account. The spring and damping coefficients, which provide the required vertical vibration frequency and the chassis damping factor for the chassis, are calculated by using the mass-spring-damper model. By using these data, a multi-body (MB) model of the suspension system was created via Adams/Car ™ multibody dynamics software package. Proper position of the control arm bearing which satisfies the minimum wheel base alteration during the wheel travel  by using the Adams / Insight ™ application. In the light of the factors such as the bearing position, chassis structure, the strokes of the spring and damper, pre-design of the control arm was carried out. Mass of this design was decreased about 37% with the help of topology optimization. Finite element (FE) analyses of the suspension system was also carried out via ANSYS® Workbench application for predicted loads on the wheel contact point which represent various load conditions. Results showed that the final design satisfies the safety condition for three times the design load. Kinematic inspection which was carried out by using the CATIA® V5R21 DMU Kinematics application was also showed that there is no penetration between the suspension components and the chassis for full jounce.

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