The use of 3D printing is becoming popular due to rapid prototyping and the ability to print complex structures. This enables the ability to print structures with different infill patterns at different infill densities, which affect orthotropic mechanical properties and consequently the intrinsic dynamics of printed structures, the analysis of which is the problem of the final thesis. An experimental analysis of selected printed structures was performed, on the basis of which the actual natural frequencies of the subjects were determined. The modulus of elasticity of the printed material was then determined by updating the numerical model. With the known modulus of elasticity of the material, a static numerical analysis was conducted and consequently the characterization of the orthotropic properties of printed structures was performed. A numerical modal analysis of the models subject was performed with the described properties, and finally a comparison of the numerical results of the modal analysis with the experimental results.
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