Lu Qing, Sun Zhijun, Yang Jianlin, Qian Feng, Guo Yu
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China.
School of Mechatronic Engineering, Jinling Institute of Technology, Nanjing 211169, P. R. China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2022 Apr 25;39(2):380-389. doi: 10.7507/1001-5515.202105012.
Ginger moxibustion has the effect of regulating zang-fu organs and activating qi and blood circulation. When used, ginger paste is required to be close to human skin. Currently, the ginger box used clinically in the hospital can't meet the requirement of large area fitting human skin, and the efficacy of ginger moxibustion is significantly reduced. In this study, a flexible ginger paste box was proposed, which was composed of flexible components polydimethylsiloxane (PDMS), spring and wire netting. The large flexibility of the structure made it fit well with human skin. Finite element method was used to study the fitting degree between ginger paste box and waist soft tissue. Finite element models of flexible ginger paste box and waist soft tissue were established based on Hypermesh and Abaqus software. The equivalent contact area between the flexible ginger paste box and waist was obtained by numerical simulation under different PDMS unilateral thickness, spring wire diameter, wire netting diameter and ginger paste layer thickness. The four parameters were taken as the influencing factors, and the equivalent contact area was taken as the optimization objective. The typical value analysis and variance analysis of S/N were performed by Taguchi method, and the results showed that among the four influencing factors, the wire netting diameter had the largest influence on equivalent contact area and its contribution rate reached 41.98%. The contribution rates of PDMS unilateral thickness, spring wire diameter and ginger paste layer thickness reached 36.48%, 13.97% and 6.50%, respectively. The optimized PDMS unilateral thickness, spring wire diameter, wire netting diameter and ginger paste layer thickness were 1.5, 0.4, 0.15, 35 mm, respectively, and the equivalent contact area was 95.60 cm . The optimized flexible ginger paste box with great fitting performance can improve the effect of ginger moxibustion.
隔姜灸具有调节脏腑、行气活血的作用。使用时，要求姜泥贴近人体皮肤。目前医院临床使用的姜盒不能满足大面积贴合人体皮肤的要求，导致隔姜灸的疗效显著降低。本研究提出一种柔性姜泥盒，其由柔性部件聚二甲基硅氧烷（PDMS）、弹簧和金属网组成。该结构的大柔韧性使其能很好地贴合人体皮肤。采用有限元方法研究姜泥盒与腰部软组织的贴合度。基于Hypermesh和Abaqus软件建立了柔性姜泥盒和腰部软组织的有限元模型。通过数值模拟得到不同PDMS单侧厚度、弹簧丝直径、金属网直径和姜泥层厚度下柔性姜泥盒与腰部的等效接触面积。将这四个参数作为影响因素，等效接触面积作为优化目标。采用田口方法对信噪比进行典型值分析和方差分析，结果表明，在四个影响因素中，金属网直径对等效接触面积的影响最大，贡献率达到41.98%。PDMS单侧厚度、弹簧丝直径和姜泥层厚度的贡献率分别为36.48%、13.97%和6.50%。优化后的PDMS单侧厚度、弹簧丝直径、金属网直径和姜泥层厚度分别为1.5、0.4、0.15、35mm，等效接触面积为95.60cm²。优化后的柔性姜泥盒具有良好的贴合性能，可提高隔姜灸的效果。
