... in realistic devices (e.g. inlet manifolds) considering the non-linear terms on Navier–Stokes equations. Design/methodology/approach Using an in-house Fortran code, a Galerkin stabilized finite element is implemented method to solve the three equation systems necessary for the topological optimization...

...David Manuel Judt; Craig Lawson Purpose – The purpose of this paper is to present a new computational framework to address future preliminary design needs for aircraft subsystems. The ability to investigate multiple candidate technologies forming subsystem architectures is enabled...

... by the assumption of the part rigidity. Every mechanical assembly consists of at least one or more flexible parts which undergo significant deformation due to gravity, temperature change, etc. The deformation has to be considered during tolerance design of the mechanical assembly, in order to ensure...

... wave propagation characteristic of hull base without adding weight is essential to the vessel acoustic stealth. Design/methodology/approach The characteristics of vibration wave propagated from typical shape base link structures have been investigated according to impedance mismatch and wave...

..., bending-resistant shapes made of acrylic material that may be Kevlar- or steel-reinforced. Seven different configurations were analyzed numerically. Design/methodology/approach – For the flow solver, the FEM-FCT scheme as implemented in FEFLO is used. The flowfields are initialized from the output...

... conditions on actuator performance. Design/methodology/approach The numerical analysis is based on an existing three‐dimensional model, where the original rate‐independent evolution equations are replaced by their rate‐dependent counterparts to facilitate implementation, which is performed in a partial...

...Wu Jian‐jun; Yang Han‐ping Purpose The paper's purpose is to provide a new spreading method for sheet metal parts, which aims to improve the standard radial spreading method. Design/methodology/approach A new radial spreading approach considering outside normal direction, which is based...

...M.M. Miladi; I.M. Mujtaba Purpose To determine optimum design and operation parameters for ternary batch distillation under fixed product demand. Design/methodology/approach In this study, two different scenarios are considered. In the first scenario, the column specification (in terms...

...S.Y. Wang; K. Tai Purpose This paper proposes a bar‐system graph representation for structural topology optimization using a genetic algorithm (GA). Design/methodology/approach Based on graph theory, a graph is first used to represent a skeletal structure consisting of joining paths...

...M.H.F.M. Barros; A.F.M. Barros; C.A. Ferreira The aim of this paper is to obtain the analytical solution for the optimal design of reinforced concrete sections under ultimate design. The equilibrium equations of the section under bending moment and axial force in rupture are derived. The ultimate...

... combinations of basic functions. The proposed method can be used for CAD model reconstruction of 3D objects and free smooth shape modelling. We have implemented the system demonstration with Visual C++ and MatLab to enable real time surface visualisation in the process of design. © MCB UP Limited 2003...

...Qing Li; Grant P. Steven; Y.M. Xie Most engineering products contain more than one component or structural element, a consideration that needs to be appreciated during the design process and beyond, to manufacturing, transportation, storage and maintenance. The allocation and design of component...

...A. Dutta; C.V. Ramakrishnan Design sensitivities of plates and shells under transient dynamic loads with constraints on displacements and stresses are likely to be highly erroneous if proper care is not taken in selecting appropriate finite element mesh and time step size to be used in the analysis...

...¢. Clearly then the computation of these geometric sensitivities is a primary task in structural shape optimisation. An obvious and popular approach to the determination of the geometric sensitivities uses the FD approximation (5) in which Δb is a perturbation of the design variable...

...W.C. Christie; P. Bettess; J.W. Bull Demonstrates the simple but effective application of a standard finite element program (PAFEC), and the associated geometric modelling code (PIGS), to the improvement of the design of an engineering component. The technique adopted involves augmenting material...

...E. Salajegheh Achieves efficient structural optimization of plate structures while the design constraints are multiple frequency constraints. Reduces the computational cost of optimization by approximating the frequencies using the Rayleigh quotient. Uses an optimality criteria method to solve each...

...JOHN R. WILLIAMS; ALEX P. PENTLAND This paper discusses advances in interactive discrete element simulation for use in computer‐aided concurrent design. We highlight the computational problems of creating a ‘virtual world’ populated by objects which behave much as real world objects and propose...