Fatigue life analysis of wheels on guideway vehicle using multibody dynamics

Lee, Soo-Ho; Park, Tae-Won; Park, Joong-Kyung; Yoon, Ji‐Won; Jun, Kab-Jin; Jung, Suk‐Yul

doi:10.1007/s12541-009-0097-x

Cited by 15 publications

(5 citation statements)

References 3 publications

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“…in. [12], [13], [14], [15] and [16]. From the available test rigs concepts we have opted for the running drum variant, where the roller runs on top of a directly driven drum, while the load is imposed on the wheel by the weight placed on an arm.…”

Section: Testingmentioning

confidence: 99%

Experimental Measurements on a Stand for a Grain Sampler

Cézová¹,

Lopot²,

Machac³

et al. 2022

Manufacturing Technology

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This paper describes experimental measurements of travel rollers on a polyurethane thread. This experiment took place at the CTU Faculty of Mechanical Engineering in the laboratory of the Department of Design and Machine Parts. The experiment was performed within the project of a lightweight type of sampler, designed by a team of collaborators from our institute for OK Servis BioPro, s.r.o. For the newly designed type of sampler, it was necessary to determine the operation of a newly designed grain sampler. The load of the rollers is different in each environment. This paper presents the average values from the measurement, including its evaluation. Moreover, the paper compares different temperatures that can be achieved in the practice. Negative temperature values were not performed, as this measurement would be expensive and inefficient. Grain samplerExperiment Measurement Travel roll Polyurethane

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Section: Testingmentioning

confidence: 99%

Experimental Measurements on a Stand for a Grain Sampler

Cézová¹,

Lopot²,

Machac³

et al. 2022

Manufacturing Technology

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“…They also discussed the reliability of fatigue life calculation. Lee et al (2009) studied the fatigue life for various parts of a guideway vehicle by coupling multibody dynamics and fatigue analysis. They determined stresses using the modal stress method or quasi-static force method depending on the loading conditions of the part.…”

Section: Stress In Multibody Dynamic Simulationmentioning

confidence: 99%

Sub-modeling approach for obtaining structural stress histories during dynamic analysis

2013

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Abstract. Modern machine structures are often fabricated by welding. From a fatigue point of view, the structural details and especially, the welded details are the most prone to fatigue damage and failure. Design against fatigue requires information on the fatigue resistance of a structure's critical details and the stress loads that act on each detail. Even though, dynamic simulation of flexible bodies is already current method for analyzing structures, obtaining the stress history of a structural detail during dynamic simulation is a challenging task; especially when the detail has a complex geometry. In particular, analyzing the stress history of every structural detail within a single finite element model can be overwhelming since the amount of nodal degrees of freedom needed in the model may require an impractical amount of computational effort. The purpose of computer simulation is to reduce amount of prototypes and speed up the product development process. Also, to take operator influence into account, real time models, i.e. simplified and computationally efficient models are required. This in turn, requires stress computation to be efficient if it will be performed during dynamic simulation. The research looks back at the theoretical background of multibody simulation and finite element method to find suitable parts to form a new approach for efficient stress calculation. This study proposes that, the problem of stress calculation during dynamic simulation can be greatly simplified by using a combination of Floating Frame of Reference Formulation with modal superposition and a sub-modeling approach. In practice, the proposed approach can be used to efficiently generate the relevant fatigue assessment stress history for a structural detail during or after dynamic simulation. Proposed approach is demonstrated in practice using one numerical example. Even though, examples are simplified the results show that approach is applicable and can be used as proposed.

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“…In this section, the stability of the proposed control law in (15) is analyzed. The following state variables and state vector are defined.…”

Section: Stability Analysismentioning

confidence: 99%

Sensitivity control of a MR-damper semi-active suspension

Turnip

Park

Hong

2010

Int. J. Precis. Eng. Manuf.

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In this paper, numerical aspects of a sensitivity control for the semi-active suspension system with a magnetorheological (MR) damper are investigated. A 2-dof quarter-car model together with a 6th order polynomial model for the MR damper are considered. For the purpose of suppressing the vertical acceleration of the sprung-mass, the square of the vertical acceleration is defined as a cost function and the current input to the MR damper is adjusted in the fashion that the current is updated in the negative gradient of the cost function. Also, for improving the ride comfort, a weighted absolute velocity of the sprung-mass is added to the control law. The implementation of the proposed algorithm requires only the measurement of the relative displacement of the suspension deflection. The local stability of the equilibrium point of the closed loop nonlinear system is proved by investigating the eigenvalues of the linearized one. Through simulations, the passive suspension, the skyhook control, and the proposed sensitivity control are compared.

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Fatigue life analysis of wheels on guideway vehicle using multibody dynamics

Cited by 15 publications

References 3 publications

Experimental Measurements on a Stand for a Grain Sampler

Experimental Measurements on a Stand for a Grain Sampler

Sub-modeling approach for obtaining structural stress histories during dynamic analysis

Sensitivity control of a MR-damper semi-active suspension

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