Perpustakaan Digital ITB

Vibration engineering is a foundational topic in mechanical engineering, as understanding the dynamic behavior of structures is essential for design integrity, reliability, and system performance. Educational apparatuses that demonstrate free and forced vibrations, damping effects, and multi-degree-of-freedom responses are therefore vital for effective learning. However, many existing systems are costly, bulky, and non-modular, limiting their accessibility. This study aims to develop a modular, low-cost, and compact vibration demonstrator capable of illustrating both single-degree-of-freedom and multi-modal vibration phenomena. The study begins with a market review of existing commercial vibration demonstrators to identify common design approaches, functional features, and limitations. A subsequent literature study on vibration theory, excitation methods, damping mechanisms, and sensing techniques establishes the analytical foundation for the design process. The apparatus is then developed through stages of conceptual design, embodiment design, and detailed engineering. For the multi-modal subsystem, modal analysis, theoretical modeling, and surrogate modeling techniques are used to determine natural frequencies, mode shapes, and key geometric parameters. The 1-DOF subsystem is developed using analytical modeling and modal-harmonic validation. Mechanical design is carried out in SolidWorks using standardized components and design-for-manufacture principles. The study concludes with prototyping, testing and comparison with existing equipment, verification of the design results, and preparation of supporting practicum modules. This work produced a relatively lightweight, compact, and modular vibration demonstrator with interchangeable subsystems and integrated sensing, providing an accessible platform for instructional vibration experiments. The apparatus has been fully fabricated and tested, and it fulfills all major design requirements, with the measured dynamic behavior agreeing closely with design predictions at a small fraction of the cost of the commercial reference unit.