Design of Vibrating Systems Using Solution Spaces

Abstract

Due to complex component interactions and multidisciplinary and possibly conflicting requirements, it is challenging to identify appropriate design goals for individual components to keep the vibration of a mechanical system below a specified level. Existing development methods are limited in that they only provide precise component targets without tolerance. Tolerance is required, however, for reconciling conflicting requirements and to provide freedom for component design. This paper presents a systematic design method for vibrating systems based on so-called solution spaces. It consists of (1) system modeling, (2) solution space computation, (3) component modeling and (4) detailed design. Solution spaces are admissible value ranges and serve as component requirements that guide independent component design. Meeting these component requirements guarantees that the overall system design goal with respect to vibration and possibly other disciplines is achieved. The proposed method is applied to an industry use case, where the rubber mount and geometrical layout of a vibratory rammer are modified to improve its dynamic and static performance. Both the system model and component model are validated by experiments. The vibration of a reference design is reduced by 48%.

Keywords

• vibration reduction
• solution spaces
• vibratory rammer
• target cascading
• systems design