A statistical characterization method for damping material properties and its application to structuralacoustic system design byung c. Our mission is to improve the safety, reliability, efficiency, and life of new or existing mechanical components and systems. Optimal design of a welded beam via genetic algorithms. Proceedings of the nato advanced study institute held in troia, portugal, june 29july 11,1986. Consequently, this book fills the gap between the basic material taught at undergraduate level and other approaches to optimum design, for example computer simulations and the. The optimal design of structures with distinct geometrically nonlinear behavior. Multicriteria optimal structural design under uncertainty, j. A new method for optimal truss topology design siam.
Optimal design of mechanical engineering systems asme. Rfem is used to define structures, materials, and loads for planar and spatial structural systems consisting of plates, walls, shells and members. Network representation of signals and energy transmission and conversion. Structural and mechanical design via optimality criterion methods analysis of optimality criteria and gradient projection methods for optimal structural design computer methods in applied mechanics and engineering, vol. Topics include statspace representation, stability, controllability, and observability of discretetime systems. The current version of the optdex design cell library, which is undergoing revision and expansion, includes speed reducer, bearing, coupling, and shaft.
Basic specifications of these systems are vibration and shock resistance, and speed of operation. The paper presents an algorithm for the optimal design of vibration impact systems with distributed parameters. As a result an optimal structural variant for automated assembly and algorithm for analytical and experimental determination of the trajectory of an assembly robot has been chosen. Design optimization massachusetts institute of technology. The sizes of the constituent elements of the system are measured such that fx. Important examples include mechanical and ocean engineering systems. Elastic links are sampled by the finite element method. Pdf on jan 1, 1979, edward haug and others published applied optimal design find, read and cite. Investors also come to realize that different structural designs affect project cost. Structural and multidisciplinary optimization 26 6, 369395, 2004. With our many tenured faculty and the breadth of mechanical engineering focus areas, you can pursue an area in the mechanical engineering field that is important to you.
Jul 31, 2006 topology design methods for structural optimization, 1526. Papalambros, principles of optimal design, cambridge university press, 2000 o. Modelling and simulation for the design of mixed dynamic systems. Optimizing the design of the mechanical transmission elements in a servodrive system has a profound effect on its dynamic performance. Design optimization applies the methods of mathematical optimization to design problem formulations and it is sometimes used interchangeably with the term engineering optimization. Here we emphasize the design of mechanical and structural precision machine components and their integration with sensor, actuator, and control systems to maximize performance. Problem formulation for multidisciplinary optimization siam. From power utilities to the oil and gas industry, we are proud to improve efficiency and productivity through expertise in engineering dynamics, structures, materials, and fluids systems. One can refer to the papers, and the references therein for the stateof. Optimal inoperation redesign of mechanical systems. Obviously, the nonoverlapping requirement on component i and component j implies 3. Optimal design and control of mechanical systems with.
The sizes of the constituent elements of the system are measured such that f x. The criteria for the choice of an optimal structural variant and an approach for searching assembly variants of mechanical products in cad medium are developed. A systems approach to structural topology optimization. Presented are two optimality criterion techniques for the minimum weight design of mechanical and structural systems subject to limitations on stresses and natural frequencies. Request pdf optimal design and control of nonlinear structures and mechanical systems this paper presents an optimal structural design system based on a variational theory of design. Extreme events and their optimal mitigation in nonlinear. This cited by count includes citations to the following articles in scholar. Optimality criterion techniques applied to mechanical design. Our staff develops mechanical solutions for multiple industries. Truss topology optimization formulated in terms of displacements and bar volumes results in a large, nonconvex optimization problem. Design optimization of lightweight spaceframe structures. With the consideration of maximum power output and minimum weight, an optimal blade design was found within the predefined design variable parameters and structural constraints. Understanding of design process and design of machine elements me 316 machine design course objectives1.
An optimal design the design is to minimize material volume, or weight, where t is an acceptable small value for wall thickness. Courses mcg 5184, mcg 46 cannot be combined for units. Optimization of mechanical systems itm, unistuttgart. A survey of current continuous nonlinear multiobjective optimization moo concepts and methods is presented. Problem formulation for multidisciplinary optimization. Optimal design with advanced materials 1st edition. Extreme events and their optimal mitigation in nonlinear structural systems excited by stochastic loads. There are books covering wide areas of electrical and electronic engineering, mechanical engineering, materials science, civil engineering, chemical and bioengineering, telecommunications, signal processing, etc. The application of artificial intelligence in the optimal.
Me 561 structural optimization using variational and numerical methods 3 optimal structural design is a graduatelevel course generally offered in spring semester. A statistical characterization method for damping material. Technical analysis of optimal design for building structure. Here is an unsorted list of online engineering books available for free download. Papalambros design laboratory, department of mechanical engineering and applied mechanics, the university of michigan, ann arbor, mi 48109. In part i, design sensitivity expressions for nonlinear parabolic systems were derived and. Application of optimality criteria to automated structural design. Design is a mixture of analysis and creative thought.
Our research programs are especially strong in areas such as energy conversion and storage, combustion, controls, biomedical devices, design and manufacturing, bioinspired. Interactive design optimization of structural systems. Consider a mechanical element as a body occupying a domain k in. Me 56100 optimal design me 56200 advanced dynamics me 56300 mechanical vibrations me 57000 machine design me 57100 reliability based design me 57200 analysis and design of robotic manipulators me 57500 theory and design of control systems me 57600 computer control of manufacturing processes me 57800 digital control. These algorithms apply a set of operators to a population of potential. This is the most commonly used constraint in optimizing the layout of structural systems with embedding components. Cad optimal design, documentation and automated assembly of. The program also allows you to create combined structures as well as model solid and contact elements. Our teams combine advanced analytical methods, using commercial and inhouse tools, with subscale and fullscale experimental capabilities for basic phenomenon such as. Department of mechanical engineering, massachusetts institute of technology, 77 massachusetts ave. Design of feedback control systems with applications to engineering, biological, and economic systems. The basic objective in structural analysis and design is to produce a structure capable of resisting all applied loads.
In recent years, various sand formulations have been successfully applied to the. Cad optimal design, documentation and automated assembly. The course is designed for graduate students in mechanical engineering or related fields who have already taken a course in finite element analysis. The methods are divided into three major categories.
Good designs are based on excellent concepts and properly designed details. Pdf design optimization of mechanical elements and structures. The course is designed for graduate students in mechanical engineering or related fields who have already taken a. This paper presents an integrated approach to optimize for design and control of mechanical systems with random input parameters.
Structural engineering fea software rfem is the basis of a modular software system. Generating optimal topologies in structural design using a homogenization method. Interactive design optimization of structural systems springerlink. Aug 15, 2014 the leastweight analyses of basic structural elements ensure a spread of interest with many applications in mechanical, civil, aircraft and automobile engineering. Long established as the uks leading specialist in the field of hydraulic steel structures, our portfolio has grown to include hydropower, moving bridges, port equipment and specialist moving structures. Optimal design of vibration impact systems sciencedirect. Part 1 focuses on the developments in structural and mechanical systems including. Explicit layout control in optimal design of structural. The distinctive feature of this new approach is that unlike the typical treatment of topology optimization problems based on the ground structure approach, we eliminate the singular optima from the problem formulation and thus unify the sizing and topology.
Mechanical engineering southwest research institute. Effects of different structural systems on lateral rigidity of steel structural frames. A new method for optimal truss topology design siam journal. Courses by research interest mechanical engineering. A design cell approach has been adopted that has the capability of addressing the design of various mechanical components and systems. They are also intimately concerned with the optimal integration of such systems with the architectural, structural and electrical. The application of artificial intelligence in the optimal design of mechanical systems. This book contains the edited version of lectures and selected papers presented at the nato advanced study institute on computer aided optimal design. The basic objective in structural analysis and design is to produce a structure capable of resisting all applied loads without failure during its intended life. Also department of theoretical and applied mechanics. The vibrational behavior of components in mechanical systems like drives and robots can become critical under changes in the system properties or loading in operation. For the case of maximization of stiffness for a prescribed volume,this paper presents a new equivalent, an unconstrained and convex minimization problem in displacements only, where the function to be minimized is the sum of terms, each of which is the.
The leastweight analyses of basic structural elements ensure a spread of interest with many applications in mechanical, civil, aircraft and automobile engineering. Engineering solutions for space science and exploration. Aerostructural design optimization of composite wind. A numerical technique defining directly the representative values and the associated probabilities is implemented by modeling the stochastic parameters as generalized wiener processes.
Nonlinear structural design sensivitity analysis for path dependent problems. Request pdf optimal design of complex mechanical systems with applications to vehicle engineering the book is devoted both to researchers wishing to acquire a basic knowledge on the. Application to ocean engineering systems han kyul joo, mustafa a. Optimal design of a welded beam via genetic algorithms aiaa.
Such undesired vibration can lead to detrimental conditions including excess wear, fatigue, discomfort, and acoustic emissions. Since the seminal work of bendsoe and kikuchi, topology optimization, which aims at designing innovative and lightweight products by distributing material within a prescribed design domain in an optimal way, has reached a certain level of maturity and become a wellestablished research area nowadays. Design, optimization, topology, adhesives, approximation, computer programming, structural design, structural optimization 1. Mechanical and structural systems haug, edward j on.
To teach students the fundamentals of mechanical engineering design theory to design, create and select components of complete mechanical systems from the recognition of need and definition of design objectives, design innovation. Materials science and engineering, volume 161, number 1. Kikuchi, generating optimal topologies in structural design using a. Optimal design and control of nonlinear structures and.
Master of applied science mechanical engineering and active components for electro mechanical systems. Applied optimal design mechanical and structural systems. Youn3, and soobum lee4 1department of mechanical engine ering, university of maryland, college park, md, 20742, usa. Shape optimization of buckling sensitive structures sciencedirect. The ge research team utilizes unique skills and domain expertise in durability, mechanical systems, mechanical synthesis, probabilistic design and structural mechanics to bring unique solutions to life for our customers. It consolidates and relates seemingly different terminology and methods. Vibration impact systems are widely used in various branches of engineering. Structural and mechanical systems, held in tr6ia, portugal, 29th june to 11th july 1986, and organized by cemul center of mechanics and materials of the technical university of lisbon. Published under licence by iop publishing ltd iop conference series. Systems are designed to avoid certain frequencies to avoid such problems, but system parameters can. Civil engineering structural engineering structural engineers analyse and design loadbearing structures such as buildings, roads, bridges, tunnels and storm surge barriers, and investigate the behaviour of the materials applied in these civil engineering structures.
Optimal design of truss structures using a new optimization algorithm based on global sensitivity analysis structural engineering and mechanics, vol. The scheme is applied to the design and optimization of small attachments that can mitigate. Optimization of heated structures for several load cases. Review of formulations for structural and mechanical system. Willcox, multidisciplinary system design optimization, mit lecture note, 2003 m. Architectural mechanical engineers specialize in the design of heating, ventilating, airconditioning, refrigeration hvacr plumbing, fire protection, and noise reduction for buildings. Multidisciplinary design optimization of dynamic engineering. Design optimization is an engineering design methodology using a mathematical formulation of. Selection of sensors and actuators for the control of mechanical systems. When applying multidisciplinary design optimization to the design of. Optimal design of mechanical engineering systems p.
Design optimization is an engineering design methodology using a mathematical formulation of a design problem to support selection of the optimal design among many alternatives. The increasing use of advanced materials, such as anisotropic fiber composites and ceramics, is instigating new developments to be made within constitutive modelling and the computational methods of analysis, sensitivity analysis and optimization. Department of mechanical engineering and applied mechanics, the university of michigan, ann arbor, mi. Optimal structural topology design using the homogenization method with multiple constraints. Optimal design of mechanical engineering systems journal. Symmetry free fulltext optimal structural design of a. Apr 25, 2012 this paper presents an integrated approach to optimize for design and control of mechanical systems with random input parameters. The results, based on their application to several examples, are compared with those obtained by other researchers and with standard nonlinear mathematical programming. Other problems in structural and mechanical design require optimization with respect to.
Optimal design with advanced materials is becoming a very progressive and challenging domain within applied mechanics. Computational methods in mechanical system dynamics. Optimal shape design of structural elements based on boundary variations results in. The generator harvests mechanical energy at an optimum level, utilizing the vibration of its mechanical system. Random parameters are represented by probability density functions. When the objective function f is a vector rather than a scalar, the problem becomes a multiobjective optimization one. The central purpose of our report is to outline the parameters that are significant for implementing the actual design to harvest the maximum optimum energy possible within periodic. Dynamic response optimization of mechanical systems with multiplier methods.