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Finite element analysis regarding the propagation of transient vibrations from handheld equipment

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Swerea IVF 是一家提供进阶研究和咨询服务的研究机构,致力于将新技术和新方法付诸实践,其业务侧重于产品、过程和生产开发。Swerea IVF 还提供有关陶瓷、聚合物和纺织材料的材料特性和应用方面的深入专业知识。Swerea IVF 隶属于 Swerea 集团,这个瑞典的研究集团致力于工业复兴和可持续发展。Swerea 集团致力于产生、发展和传播研究结果,业务涉及材料开发、生产开发和产品开发等领域。

With this data, we were able to make a simplified model of the skin for successful use in FEA

The sample measured is a replica of the skin on a fingertip. In this case, the difficulty of holding one’s finger still during the measurement necessitates using the indirect method of measuring on replicas. The objective was to obtain information for simulation of microgeometry of skin to be able to create a simplified virtual model.

The model was going to be used in finite element analysis (FEA) regarding the propagation of transient vibrations from handheld equipment, such as impact wrenches and chisel machines, through the skin to the nerves where damage occurs.

These vibrations can cause a medical condition called “white fingers” which is a common work-related health problem. Before this government-sponsored project, the microgeometry of skin had not yet been characterized for this specific purpose.

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Figure 1. Overview of skin with the measurement area depicted inside the rectangular blue grid
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Figure 2. 5x9 mm Extended measurement
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Figure 3. Example of an evaluation of the sample’s geometry using SensoMAP advanced contour module

Using the confocal technique, the 20X brightfield objective lens, and extended measurements, we were able to measure the skin geometry with a high resolution and sufficient reliability to draw general conclusions regarding the size, height, and distribution of the ridges and lines of the skin. With this data, we were able to make a simplified model of the skin for successful use in FEA.

For more information, check the Attenuation of hand-held machine vibrations. Application of non-linear tuned vibration absorber.

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