Browse Publications Technical Papers 2020-01-0489

Application of Dynamic Reduction Techniques to Design and Optimize Structural Component under Random Vibrations 2020-01-0489

Computer Aided Engineering offers affordable, cost-effective and practical solutions to a wide range of engineering problems. Engineering structures generally comprising of assemblies of numerous components and its sub-assemblies. The performance prediction and development work for these assemblies is done rigorously through design and optimization. Dynamic analysis such as Modal and Frequency Response Analysis demands presence of all assemblies to capture heavy inertial and damping effects on a single component. However, just to evaluate performance of single component considering real time test environments within entire assembly, it takes whole assemblies to model as it is, which takes a lot of computational efforts and time. This is perplexing and doesn't feel reasonable. This essential problem will be addressed though this paper work. Traditional way of model reduction is static condensation which gives only stiffness matrix and it does not consider inertial and damping properties. Whereas, Dynamic condensation method offers the effects of inertial and damping as well giving us more accurate model behavior. The scope of paper is the paradigm of Dynamic Sub structuring (DS) / Component Mode Synthesis (CMS) which is recommended for assembly level dynamic analysis in design and optimization. In Dynamic condensation, assemblies are reduced into simple matrix forms. These matrices are then clubbed further with smaller models giving out combined behavior at cost of reduced model only. Using super elements, we can not only analyze large models (including those that exceed the capacity of your hardware), but can become more efficient in performing the analysis, thus allowing more iterations. Dynamic sub structuring is particularly tailored for simulation of Random vibrations. It is applicable to models of any size and frequency. Therefore it has widespread potential to design & optimization engineering products ranging from automotive to aerospace.


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