Full-contact orthopedic insole design for plantar pressure optimization
In order to optimize the plantar pressure distribution and reduce the peak plantar pressure,a parametric design method for full-contact orthopedic insoles based on a three-dimensional foot model was proposed.Based on the plantar pressure data and combined with the 3D lattice structure analysis,the offloading structure of the insole was optimized.First of all,in order to realize the personalized design of the full-contact insole,the foot 3D scanning model was employed to develop the parametric design process of the full-contact insole model through the Grasshopper plug-in platform.Subsequently,the energy absorption efficiency of six common 3D cubic lattice structures made of TPU was analyzed under the Abaqus environment,and the effective elastic modulus of diamond lattice structures was calculated under different filling rates.The performance of different lattice structures in absorbing plantar pressure was evaluated to provide a scientific basis for the selection of pressure-reducing structures.In the next part,the image sampling algorithm was used to extract the areas with higher plantar pressure,and the corresponding effective modulus of elasticity was chosen to fill different parts,completing the optimization design of the full-contact orthopedic insole.Additionally,the pressure reduction performance of the orthopedic insole before and after the optimization was compared through simulation analysis.Finally,static and dynamic plantar pressure measurement experiments demonstrated that personalized orthopedic insoles based on foot shape and three-dimensional pressure-reducing structures can effectively optimize the distribution of plantar pressure,offload the peak value of plantar pressure,and improve foot stability.