基于减重步行训练的双气囊结构设计与计算分析

目的 研究开发一种基于减重功能训练的双气囊减重设备，并分析该结构设计的合理性。方法 建立双气囊中充气过程中的数学模型，利用Gambit软件建立双气囊三维模型并进行网格划分，利用Fluent软件对气囊内部气体流动进行模拟计算。在装置的设计与样机初步加工的基础上，选取体重范围在80 kg内不同体重的正常人进行临床实验。结果 上、下气囊的充气时间为16.9 s，最大减重比为90%，内部压力均在2 kPa，初步临床实验获得减重比与气囊内部气压值的关系，验证了结构设计的合理性。结论 设计的双气囊结构符合减重训练的需求，可为下肢功能障碍患者康复训练提供一种有效的减重方法和结构设计的思路。
Objective To develop a double-gasbag weight loss equipment based on body weight support treadmill training (BWSTT)，and analyze the reasonability of the structure design. Methods The mathematical model of double gasbags in the process of air inflation was established, and the 3D model of double gasbags was established and meshed using Gambit; the analog computation for gas flow of the gasbag was conducted using Fluent; normal subjects with body weight below 80 kg were selected for clinical experiments based on designing and roughing of the prototype. Results The inflation time of double gasbags was 16.9 s and the maximum weight loss percentage was 90%; the pressure inside double gasbags was 2 kPa, and the relationship between the weight loss percentage and inside pressure of the gasbag was obtained by clinical experiments, which verified the reasonability of the gasbag structure. Conclusions The double-gasbag structure can meet the requirements of weigh loss training, which provides an effective weight loss support method and a feasible structural design for patients with lower limb dysfunction during rehabilitation training.