Torsional stiffness and weight optimization of a real bus structure

Structural Analysis of an Articulated Urban Bus Chassis via FEM: a Methodology Applied to a Case Study

“…1) at one time, hence the overall assembly has been divided into two sub assemblies, one being the front half of the chassis and one the rear part of it: from now on, they will be respectively referred to as A-chassis and B-chassis. Such a large structures would be generally analyzed by introducing rough approximations mainly concerning the loading and constraining hypotheses (uniform loads distributions [7]) or by means of beam (1D) elements [8].…”

“…hot spot stress method or the peak stress method recently proposed by Meneghetti et al [14]) is not the object of this work. No welds are, accordingly, modelled in the chassis geometry; the connection between beam and column is managed by the contact stiffness parameters, as shown in [8]. In order to check the numerical structural stress state of the beam and column (far from the weld toe), a comparison with the data evaluated via strain gages in a square-tosquare hollow section T-joint [14] and [15], has been performed.…”

Optimization of Bus Body Frame Structure for Weight Minimizing with Constraint of Natural Frequency using Adaptive Single-Objective Method

“…In this study, beam element was extensively used to create the frame structure of bus body because it can not only archive the accurate stiffness but also reduce much computational cost [6,7]. The bus body geometry was obtained directly from the three-dimensional Computer-Aided Design (CAD) files.…”

Material arrangement optimization for weight minimization of an automotive body in white using a bi-level design strategy

“…Herein, we set the types of material of various BIW parts as design variables and apply an optimization technique to minimize the weight subject to the bending and torsional stiffness constraints, because these stiffness values represent the deflections of the automotive BIW during driving, and these deflections strongly influence the ride comfort, the safety and the handling. [5][6][7] Two approaches are commonly used to reduce the BIW weight: a change in the automotive BIW structure and the use of lightweight materials. There have been many studies on reducing the BIW weight by changing 1 the BIW structure.…”