Robust design of additively manufactured acoustic structures

增材制造声学结构的稳健设计

• 批准号: 508318707
• 负责人: Professorin Dr.-Ing. Sabine C. Langer
• 金额: --
• 依托单位: Institut für Konstruktionstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/508318707?language=en
• 关键词: Robust; design; additively; manufactured; acoustic

Additive Manufacturing like Material Extrusion, offers new freedom in design, due to its principle of layer-by-layer material deposition. Among other benefits, this allows a combination of multiple materials within one part and the realization of undercuts like lattice structures, without additional assembly and joining processes or post-processing. Thus, new possibilities arise for manufacturing and integrating acoustically effective structures with tailored properties to reduce structure-borne and airborne sound.This research project aims to develop a methodology for the robust design of additively manufactured acoustic black holes and porous absorbers. The closely linked cooperation between the fields of acoustics, engineering design and additive manufacturing is the prerequisite for elucidating the event chains – also process-structure-property relations – of acoustic parameters, part properties, process parameters and the design of geometry. A systematic and robust design of acoustic structures with defined parameters is currently still limited by a lack of detailed knowledge regarding the inherent sensitivities between process parameter selection as well as geometry definition and the resulting acoustics-relevant properties.In order to achieve this goal, the dependencies between part properties and acoustic parameters for the specific adjustment of the acoustic function are investigated in this research project for the two use cases of acoustic black holes and porous absorbers, on the one hand. On the other hand, the process-specific influencing factors on the resulting part properties and the geometric features are systematically analyzed. The event chain relationships are systematically determined by means of numerical and experimental investigations and are the basis for a robust design of acoustic structures manufactured by material extrusion. The aim is to identify sensitive and robust event chains in order to achieve a goal-oriented adjustment of the resulting part properties and, thus, of the function with a low uncertainty. To utilize this potential, the knowledge gained will be transferred into a methodology and design rules. The validation of the methodology and the evaluation of the potential of additive manufacturing processes for a robust production of acoustic black holes and porous absorbers with specific properties will finally be achieved by the manufacturing of demonstrators for the two defined use cases.

增材制造如材料挤出，由于其逐层材料沉积的原理，提供了新的设计自由。除了其他好处之外，这允许在一个部件内组合多种材料，并实现像网格结构一样的底切，而无需额外的组装和连接过程或后处理。因此，制造和集成具有定制特性的声学有效结构以减少结构传播和空气传播的声音的新可能性出现了。本研究项目旨在开发增材制造声学黑洞和多孔吸收体的稳健设计方法。声学、工程设计和增材制造领域之间的密切合作是阐明声学参数、零件性能、工艺参数和几何设计的事件链-以及工艺-结构-性能关系的先决条件。具有限定参数的声学结构的系统的和鲁棒的设计目前仍然受限于缺乏关于过程参数选择以及几何形状定义与所产生的声学相关性质之间的固有灵敏度的详细知识。在本研究计划中，研究了零件性能和声学参数之间的依赖关系，以便对声学功能进行特定调整对于声学黑洞和多孔吸收体这两个用例，一方面。另一方面，系统地分析了特定工艺因素对最终零件性能和几何特征的影响。事件链的关系是系统地确定的数值和实验研究的手段，是一个强大的设计材料挤压制造的声学结构的基础。目的是识别敏感和强大的事件链，以实现以目标为导向的调整所产生的部分属性，因此，具有低不确定性的功能。为了利用这种潜力，所获得的知识将转化为方法和设计规则。最终将通过为两个定义的用例制造演示器来实现对方法的验证和对增材制造工艺的潜力的评估，以稳健地生产具有特定特性的声学黑洞和多孔吸收体。