关键词: 3D打印薄板, 固有频率, 路径宽度, 模态振型, 熔融沉积成型

Abstract: Fused deposition modeling (FDM) is a fast growing rapid prototyping technology due to its ability to build functional parts having complex geometrical shapes in reasonable build time. However, the built parts are hardly comparable to those produced by the traditional means in vibration property, which is one of the most obvious defects that hinder the development of rapid prototyping technology. With the increasingly wide application of FDM products, a more practical analysis of vibration characteristics is needed urgently. The effect of road width on the inherent characteristics of FDM 3D printing plates is studied, and the mechanism is revealed. Based on the classical laminated plate theory, the FDM plates with cantilever boundary conditions are taken into account, and the mode shapes are represented by the combination method of bi-directional beam function. The results are solved through the Ritz method. The specific process for predicting the inherent characteristics of the FDM plate by the theoretical method is thus provided. At the same time, the corresponding testing system is set up, measuring the natural frequency and mode shapes of the FDM plate. Finally, the predictions of the inherent characteristics are compared with the measurements, validating the reliability of the proposed theoretical model. In addition, the theoretical basis and technical support for further research on improving the dynamic performance of FDM products are provided.

Key words: 3D printing plate, fused deposition modeling, mode shape, natural frequency, road width