Predicting the fatigue life of a semi-trailer suspension elements at the early stages of design
Abstract
Introduction. Road transportation of goods is the main delivery method both in our country and abroad. The largest number of goods transported by road accounts for saddle road trains. Thus, the problem of improving structural elements of road trains and working out ways of its solution is an important task. The object of the research is the study of the suspension system and the semi-trailer chassis elements.
The purpose of the study is the calculation of the fatigue life of both the carrier system elements and the axle’s suspension of the semi-trailer which is based on the calculation finite element method. The purpose of the work is the link flexibility influence of the loads obtained in the semi-trailer dynamic model on the durability calculated parameters of the suspension system parts.
Methodology and research methods. System calculations for the dynamics of solids have been made. The assessment of their fatigue life was carried out by means of the finite element method. Two types of calculations were carried out when using both absolutely rigid links and deformable links of a semitrailer of a train. The calculations of the two models were carried out for several characteristic design cases considering the elements of the suspension system. The paper presents a mode of driving on a rough road of the second category of operations, as an example.
Scientific novelty and results. The comparison of calculations showed that the deformations of the dynamic suspension links not only reduced the loads in the hinges of the model but also led to a fatigue life increase which is of essential importance for semi-trailers due to their requirements of larger resources.
The practical significance of the work lies in the possibility of determining loads on suspension system elements, which will make it possible to reduce the mass of parts for a given durability.
About the Authors
D. S. Vdovin
Department “Wheeled vehicles”, Bauman Moscow State Technical University
Russian Federation
Russian Federation
PhD (Eng), associate professor
Moscow 105005
I. V. Chichekin
Department “Wheeled vehicles”, Bauman Moscow State Technical University
Russian Federation
Russian Federation
PhD (Eng), associate professor
Moscow 105005
Ya. Yu. Levenkov
Department “Wheeled vehicles”, Bauman Moscow State Technical University
Russian Federation
Russian Federation
PhD (Eng), associate professor
Moscow 105005
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Review
For citations:
Vdovin D.S., Chichekin I.V., Levenkov Ya.Yu. Predicting the fatigue life of a semi-trailer suspension elements at the early stages of design. Trudy NAMI. 2019;(2):14-23. (In Russ.)
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