Road Vehicle Modeling Requirements for Optimization of Ride and Handling

Gonçalves, João Nikolai Vargas; Ambrósio, Jorge

doi:10.1007/s11044-005-2528-5

Cited by 40 publications

(16 citation statements)

References 17 publications

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“…However, the instant, for which the function has its maximum value may vary during the optimization process. One form of dealing with this problem is to introduce an extra design variable, b n+1 and make the objective function equal to the value of such variable [37,52]. The new optimization problem is defined as…”

Section: Minimization Of the Maximum Deformation Energymentioning

confidence: 99%

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Optimization of a complex flexible multibody systems with composite materials

2007

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The paper presents a general optimization methodology for flexible multibody systems which is demonstrated to find optimal layouts of fiber composite structures components. The goal of the optimization process is to minimize the structural deformation and, simultaneously, to fulfill a set of multidisciplinary constraints, by finding the optimal values for the fiber orientation of composite structures. In this work, a general formulation for the computation of the first order analytical sensitivities based on the use of automatic differentiation tools is applied. A critical overview on the use of the sensitivities obtained by automatic differentiation against analytical sensitivities derived and implemented by hand is made with the purpose of identifying shortcomings and proposing solutions. The equations of motion and sensitivities of the flexible multibody system are solved simultaneously being the accelerations and velocities of the system and the sensitivities of the accelerations and of the velocities integrated in time using a multi-step multi-order integration algorithm. Then, the optimal design of the flexible multibody system is formulated to minimize the deformation energy of the system subjected to a set of technological and functional constraints. The methodologies proposed are first discussed for a simple demonstrative example and applied after to the optimization of a complex flexible multibody system, represented by a satellite antenna that is unfolded from its launching configuration to its functional state.

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Section: Minimization Of the Maximum Deformation Energymentioning

confidence: 99%

“…This approach poses some difficulties for the search direction calculus, and can lead to small steps in the line search method, or even to the stall of the optimization process. To overcome these difficulties, the max value point is handled directly only in the optimization process [52].…”

Section: Minimization Of the Maximum Deformation Energymentioning

confidence: 99%

Optimization of a complex flexible multibody systems with composite materials

2007

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“…The extension by including of the optimization of the handling characteristic is given in Ref. 43. The design of heavy vehicles for good dynamic performance in a variety of scenarios or maneuvers (from standard test maneuvers to extreme emergency maneuvers) is discussed in Ref.…”

Section: Safety and Ride Comfortmentioning

confidence: 99%

A Critical Review of Optimization Methods for Road Vehicles Design

Gobbi

Haque

Papalambros³

et al. 2006

11th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference

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[Abstract] The paper deals with the optimal design of road vehicles and their subsystems. The highly competitive nature of the automotive industry demands constant product innovation and reduction in product development both in time and cost while satisfying performance and legal requirements. Optimization procedures provide a scientific approach to automatically determine the most efficient designs under the target operating environment. Particular attention is devoted to the class of methods pertaining to complex system design optimization, as well as the approaches for the optimal design of complex systems under uncertainty. A critical review of the optimization methods used for solving road vehicle system design problems is reported. Some examples of design optimization are given in the field of vehicle system dynamics, powertrain design, internal combustion engine design, active and passive safety, vehicle system design and lightweight structures, advanced automotive electronics.

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“…It is particularly useful at the early stage of the development of a car model (Torstenfelt and Klarbring 2007). A flexible multi-body model of a road vehicle was built for improvement on handling and comfort performance (Goncalves and Ambrosio 2005). In an attempt to reduce the weight of a high performance automobile while meeting the performance targets, topology optimization was performed using the SIMP method with the software package Altair OptiStruct 9 based on finite element analysis (Cavazzuti et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Design of the lower chassis of a monorail personal rapid transit (MPRT) car using the evolutionary structural optimization (ESO) method

Li¹

2016

Struct Multidisc Optim

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The Evolutionary Structural Optimization (ESO) procedure was applied to the design of the lower chassis of a monorail personal rapid transit (MPRT) car. As part of the early-stage development effort, ESO was used to identify a good topology of the lower chassis structure, which is effective in material usage, with lowly-stressed material removed. The procedure started with building a three-dimensional finite element model of the topology that occupies the design envelop, and lowly stressed elements were removed step by step during the ESO procedure. Multiple load cases concerning acceleration, deceleration, left turn, and right turn were analyzed separately, and a simple procedure dealing with multiple load cases was adopted. After 14 calculation increments, 80 % of the initial material was removed. The resulting topology reveals a reasonable frame structure with rounded outer corners, triangular cantilever supports, and Michell style beam structures, suitable as a starting reference for the structure design of a MPRT.

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Road Vehicle Modeling Requirements for Optimization of Ride and Handling

Cited by 40 publications

References 17 publications

Optimization of a complex flexible multibody systems with composite materials

Optimization of a complex flexible multibody systems with composite materials

A Critical Review of Optimization Methods for Road Vehicles Design

Design of the lower chassis of a monorail personal rapid transit (MPRT) car using the evolutionary structural optimization (ESO) method

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