Researching into the methodology for the evaluation of deformed soft furniture upholstery

Purpose The main aim of this work is to evaluate upholstery deformation by using resonant vibrations of separate zones of the soft part. Design/methodology/approach Provided methodology allows assessing the upholstery deformation of separate parts of soft furniture by exciting resonant vibrations in it. Findings By recording the value of resonant frequency at separate points of the plane, it becomes possible to obtain the graph of deformation distribution. It is compared to the graph that demonstrates how rigidity distributes itself in different directions within the upholstery fabric. This enables the authors to evaluate the unevenness of upholstery deformation that is present in different directions. Originality/value Provided methodology allows assessing the quality of soft furniture assembly and predicting the exploitation time for its upholstery.