A brief review of the application of optimisation methods in conjunction with numerical simulation to design of extrusion dies for plastics and rubber is given. Following this, based on a simulation of slit die perfor...
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A brief review of the application of optimisation methods in conjunction with numerical simulation to design of extrusion dies for plastics and rubber is given. Following this, based on a simulation of slit die performance that takes into account the coupling of melt flow and die body deflection due to melt pressure, a genetic algorithm is applied to determine choker bar profiles to give optimum melt flow distribution. The software makes it possible to predict the practical operating range of dies in terms of melt flow properties and throughput.
A major contributor to the expense and length of time to design, build, and test new systems has been the need to build and test hardware prototypes to determine their effectiveness in meeting operational requirements...
A major contributor to the expense and length of time to design, build, and test new systems has been the need to build and test hardware prototypes to determine their effectiveness in meeting operational requirements. Recent and dramatic advances in computer simulation technologies hold forth the promise of revolutionizing design and acquisition strategies by providing the means to validate end users' requirements prior to hardware construction. By designing and operationally testing virtual prototypes in a virtual environment, these technologies will soon offer naval architects the ability to build and launch ships in computer-based cyberspace in lieu of the shipbuilder's ways. The authors of this paper provide the background for these developments, explore the significance and ramifications of these technologies to the current process of ship and system design, outline challenges lying ahead, and present their vision and recommendations for future development.
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