Two-points-based receptance coupling method for tool-tip dynamics prediction

Tool-tip frequency response function (FRF) is essential to predict chatter vibration in milling. This key input can be acquired by experimental tests, but a new test has to be performed for every tool clamped on the machine. To avoid such time-consuming procedures, receptance coupling methods have been developed, allowing coupling of the experimental dynamic response of the machine to the numerical model of the tool. Such tech- niques require joint rotation response, which is hard to exper- imentally identify. Inversion of receptance coupling technique is usually performed on additional experimental measurements to overcome this issue. This procedure ampli es measurement uncertainties, reducing accuracy of the coupling approach. In this article, a novel receptance coupling technique is presented. Machine and toolkit are connected through two distinct points, eliminating the experimental phase and computation of rota- tional degrees of freedom (DOFs). Only translation responses are required, acquired by a single test setup. Proposed technique was experimentally validated on di erent case studies.