Requirement-Driven Engineering Design and Finite Element-Based Evaluation of a Bio-Based Enclosure for Interactive Acoustic Terminals: A Willow-Wood Case Study

This study presents a sustainability-oriented requirement-driven engineering design framework for an enclosure used in interactive acoustic terminals. A willow-wood enclosure is used as a case study to connect user requirement analysis, structural concept generation, and finite element-based structural and modal evaluation. Application of Kano–AHP and the subsequent structural-actionability screening retained three Must-be constraints and three One-dimensional objectives for engineering translation. TRIZ-based contradiction resolution converted these priorities into an integrated top-control layout, a faceted willow shell, and local reinforcement around the large interactive opening. Static structural and constrained modal analyses were conducted using ANSYS Workbench 2022 R1 to evaluate the structural and modal feasibility of the willow-wood shell against an ABS benchmark. Results show that the willow-wood shell reaches a first natural frequency of 216.32 Hz, close to the ABS shell (215.28 Hz), and a maximum von Mises stress of 12.63 MPa under a 100 N load. Taken together, these results indicate the potential of the proposed requirement-driven framework to support the early-stage development and preliminary structural assessment of sustainable bio-based acoustic enclosures.