Research and Application on Dynamic Stiffness of Leaf Spring

Zhou, Zhanfu; Guo, Wenhua; Shen, Tiejun; Wang, Fengdong; Ju, Jianhui; Wang, Haiyan; E, Song

doi:10.1007/978-3-642-33795-6_10

Cited by 3 publications

(3 citation statements)

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“…The dynamic properties of a many-sheet spring used in the suspension of a light commercial vehicle were considered in work [10]. The effects of friction in the spring, the frequency and amplitude of oscillations on the dynamic rigidity of the spring were evaluated.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Comparing the physical principles of action of suspension damping devices based on their influence on the mobility of wheeled vehicles

Dushchenko

Vorontsov

Masliyev

et al. 2021

EEJET

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This paper reports the comparison of two physical principles of action of suspension damping devices based on their influence on the mobility indicators for an 8×8 wheeled machine. A radical difference between these principles of action is the dependence of resistance forces on the speed of the relative movement of working bodies (internal friction: hydraulic shock absorbers) or on the relative movement of working bodies (external friction: friction shock absorbers). Widespread hydraulic shock absorbers have certain disadvantages that do not make it possible to further increase the mobility of wheeled or tracked vehicles without the use of control and recuperation systems. In turn, in friction shock absorbers, the use of new materials has eliminated many of their shortcomings and thus can provide significant advantages. It was established that the application of friction shock absorbers for a given wheeled vehicle did not significantly affect the speed compared to hydraulic ones. The main factor that prevented the implementation of the advantages of friction shock absorbers was the insufficient suspension travel. However, friction shock absorbers absorbed 1.76...2.3 times less power, which reduced the load on nodes and increased efficiency (autonomy). In addition, a more uniform load on suspensions was ensured, which improved their resource, and, due to the prevailing vertical oscillations of the suspended body over the longitudinal-angular ones, the geometric passability improved as well. The comparison of two physical principles of action of damper suspension devices in a wheeled vehicle has shown that the use of friction shock absorbers could provide significant advantages in resolving the task relates to improving the mobility and would fundamentally affect the choice of the suspension energy recuperation system if it is applied.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Comparing the physical principles of action of suspension damping devices based on their influence on the mobility of wheeled vehicles

Dushchenko

Vorontsov

Masliyev

et al. 2021

EEJET

View full text Add to dashboard Cite

show abstract

“…It leads to a deterioration of the ride comfort. In the study [14] have been researched the dynamic properties of the stiffness of the multi-leaf spring in terms of designing the structure with a particular attention to the ride comfort. The spring intended for a light-duty truck has constituted an object of the studies.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the ride comfort has been significantly improved. According to [14] it has been found that the dynamic stiffness of the leaf spring changes as the frequency, amplitude and energy dissipated due to the friction are changed. In the study it has been evidenced that a decrease of the friction between the spring leaves of the spring is the most effective way to improve the dynamic stiffness of the multi-leaf spring.…”

Section: Introductionmentioning

confidence: 99%

The experimental tests on the friction coefficient between the leaves of the multi-leaf spring considering a condition of the friction surfaces

Hryciów

Krasoń

Wysocki

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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Article citation info: (*) Tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie www.ein.org.pl Zdzisław Hryciów wiesław KrAsoń Józef wysocKiThe experimenTal TesTs on The fricTion coefficienT beTween The leaves of The mulTi-leaf spring considering a condiTion of The fricTion surfaces badania eksperymenTalne współczynnika Tarcia pomiędzy piórami resoru wielopiórowego z uwzględnieniem sTanu powierzchni ciernych*In this study are presented the results of the simulation tests of the friction pairs occurring between the spring leaves while considering a condition of the mating surfaces and an impact of the velocity of their mutual dislocation on the values of the friction coefficients. It has been proposed a methodology in respect of a determination of the coefficients of the static and kinetic friction. Two kinds of the specimens have been prepared for the tests, which have been cut out from a spring leaf of the prototype springthey have created the model friction pairs. The condition of the specimen surface and their selected mechanical properties have been evaluated. During the experimental tests have been considered: four sliding velocities, four variants of the surface conditions and two values of the normal load. The tests of the friction pairs have been performed at the laboratory stand for measuring the friction force. The results of the tests have been presented in a form of the time courses of friction force, graphs and tabular summaries of the friction coefficients. It has been conducted a comparative analysis of the results in order to determine an influence of the test results on the values of the determined friction coefficients. The proposed research conditions are approximate to the typical operating conditions of the road vehicles.

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Evaluation of the influence of friction in a multi-leaf spring on the working conditions of a truck driver

Hryciów¹,

Krasoń²,

Wysocki³

2021

Eksploatacja i Niezawodność – Maintenance and Reliability

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This article presents a simulation study of the suspension system in a vehicle that weighs approximately 12 tons (class N2). The authors have tested the influence of experimentally determined values of friction coefficients on the energy dissipated in the multi-leaf spring. The study was carried out using finite element analysis with LS-DYNA software. A nonlinear vibration model of the complete spring was developed, including the variable friction forces between the leafs. The model takes into account the sprung and unsprung mass of the chassis. Numerical tests were carried out using three different coefficients of friction (determined experimentally) for a selected speed of the car. Random realizations of the road micro-profile (type A, B, C) recommended by ISO 8608 were used. The results of the tests were presented in the form of acceleration curves in the vertical direction, comparative plots of daily vibration exposure A(8) and vibration transmission coefficient (T), and the distributions of RMS acceleration in frequency of one-third octave bands. This data was used to assess the quality of the vibration isolation system between the front suspension of the vehicle and the driver’s seat.

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Research and Application on Dynamic Stiffness of Leaf Spring

Cited by 3 publications

References 0 publications

Comparing the physical principles of action of suspension damping devices based on their influence on the mobility of wheeled vehicles

Comparing the physical principles of action of suspension damping devices based on their influence on the mobility of wheeled vehicles

The experimental tests on the friction coefficient between the leaves of the multi-leaf spring considering a condition of the friction surfaces

Evaluation of the influence of friction in a multi-leaf spring on the working conditions of a truck driver

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