Vehicle dynamics simulations with coupled multibody and finite element models

The paper presents a method of modeling dynamics of multibody systems with open and closed kinematic chains. The joint coordinates and homogeneous transformations are applied in order to formulate the equations of motion of a rigid body. In this method, constraint equations are introduced only in the case when closed subchains are considered or when the joint reactions have to be calculated. This allows the number of generalized coordinates in the system to be reduced in comparison to the case when absolute coordinates are applied. It is shown how the method can be applied to modeling of vehicle dynamics. The calculation results are compared with those obtained when the ADAMS/Car package is used. Experimental verification has been performed and is reported in the paper, as well. In both cases, a good correspondence of results has been achieved. Final remarks concerning advantages and disadvantages of the method are formulated at the end of the paper.

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“…The coordinates of the center of mass of body (S) can be expressed in local frame {S} according to (12) as:…”

Section: Potential Energy Of Gravity Forcesmentioning

confidence: 99%

“…Many software packages have been developed, and they are widely used as general purpose multibody simulation codes, [9][10][11][12]. Frequently, multibody models of rigid systems are coupled with flexible structures, and the resulting systems of bodies are analyzed together [13].…”

Section: Introductionmentioning

confidence: 99%

Application of joint coordinates and homogeneous transformations to modeling of vehicle dynamics

Szczotka

Wojciech

2007

Nonlinear Dyn

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“…The mathematical description of vehicle behavior is possible to find in publications [1,2], which generally show the importance of the topic. Specifically, publication [3] deals with the creating of the MBS computational model of the whole vehicle using non-linear FEM model of the tire, which is then used for simulations and research of vehicle behavior on rough road surfaces. Driving characteristics and vehicle behavior are affected by many aspects.…”

Section: Introductionmentioning

confidence: 99%

Elasto-Kinematic Computational Model of Suspension With Flexible Supporting Elements

Vrána¹,

Bradáč

Kovanda

2016

Acta Polytech

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This paper analyzes the impact of flexibility of individual supporting elements of independent suspension on its elasto-kinematic characteristics. The toe and camber angle are the geometric parameters of the suspension, which waveforms and their changes under the action of vertical, longitudinal and transverse forces affect the stability of the vehicle. To study these dependencies, the computational multibody system (MBS) model of axle suspension in the system HyperWorks is created. There are implemented Finite-Element-Method (FEM) models reflecting the flexibility of the main supporting elements. These are subframe, the longitudinal arms, transverse arms and knuckle. Flexible models are developed using Component Mode Synthesis (CMS) by Craig-Bampton. The model further comprises force elements, such as helical springs, shock absorbers with a stop of the wheel and the anti-roll bar. Rubber-metal bushings are modeled flexibly, using nonlinear deformation characteristics. Simulation results are validated by experimental measurements of geometric parameters of real suspension.

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“…The obtained results were verified through a modal test of an experimental vehicle and a relative good agreement was achieved. Mousseau et al [12] also created a comprehensive vehicle dynamics model and used it to simulate the dynamic response of ground vehicles on rough surfaces. In Mousseau's study, multi-body system simulation (MSS) program was applied to simulate the vehicle model, included vehicle ride and NVH analysis, as well as durability loads simulation This paper first introduces how to create modeling abstractions for different types of suspension systems.…”

Section: Introductionmentioning

confidence: 99%

Modeling Abstractions of Vehicle Suspension Systems Supporting the Rigid Body Analysis

Liu

2010

Int. J. Vehicle Structures and Systems

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It is possible to use "architecture concept models" for CAE analyses supporting the design and optimization of a vehicle's general layout prior to the time-consuming and expensive preparation of detailed models. Suspension system, including kinematic linkages, compliance and damping elements, wheels, tires, and brakes, plays a key role in determining whether the basic layout of a vehicle is suitable for given application. This paper presents an appropriate set of architecture-level abstractions for suspension systems that can be incorporated into full-vehicle concept models. These modeling abstractions provide abstract representations of a wide variety of suspension system configurations that illustrate both geometric and functional properties without resorting to high-fidelity solid model renderings of parts using details that simply do not exist this early in the design process. The architecture concept suspension model presented in this study can be used for vehicles rigid body analysis. KEYWORDS:Suspension system, Braking system, Concept model, Rigid body analysis, Vehicle design CITATION: Y. Liu. 2010. Modeling abstractions of vehicle suspension systems supporting the rigid body analysis, Int. J. Vehicle Structures & Systems, 2(3-4), 117-126.

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Vehicle dynamics simulations with coupled multibody and finite element models

Cited by 33 publications

References 5 publications

Application of joint coordinates and homogeneous transformations to modeling of vehicle dynamics

Application of joint coordinates and homogeneous transformations to modeling of vehicle dynamics

Elasto-Kinematic Computational Model of Suspension With Flexible Supporting Elements

Modeling Abstractions of Vehicle Suspension Systems Supporting the Rigid Body Analysis

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