坐姿中臀部软组织的受力探讨

The Study of Stresses on Buttock Soft Tissue in Sitting Position

坐姿中臀部软组织对毛细血管的压迫是导致疲劳、麻木和疼痛等不舒适的主要原因,对坐的不舒适的研究有着重要的意义。本文首先分析了压迫臀部软组织的三种作用力:压力、平行剪应力、挤压剪应力;其次,逐一剖析了三种作用力对臀部软组织的压缩和扭曲;最后,对臀部软组织可忍受压力的临界值及其影响因素进行了深入探讨。

The fundamental cause of the sitting discomfort such as fatige, numbness and pain lies in the slow or closed flow of capillary under the oppression of buttock soft tissue. The research of sitting discom- fort is of great significance. In the first, three kinds of forces in aspects of normal stress, parallel shear, and pinch shear were analyzed. Then, how these three kinds of forces worked on the deformation and dis- tortion of buttock soft tissue were studied. The threshold of tolerance stress and its factors were disscussed in the end.