不同支撑强度运动文胸的有限元建模仿真与性能评估OA

This study aims to systematically evaluate the biomechanical performance of sports bras with different support levels during dynamic running.It focuses on how structural design affects breast motion control and wearer comfort.Key design variables were quantified,including cup coverage,strap width,and underband structure.Their effects on breast displacement and body-surface pressure distribution were investigated.This provides a theoretical basis for optimizing sports bra design to balance support and comfort. The research combined experimental measurement with finite element simulation.A healthy female subject(bra size 70C)was selected.Her torso geometry was obtained via 3D scanning.Motion capture technology collected movement data at three running speeds(4 km/h,5 km/h and 6 km/h).These data served as boundary conditions for the simulation.A biomechanical model was built.It included a rigid torso,a linearly elastic adipose tissue layer,and mammary glands modeled with a Mooney-Rivlin hyperelastic material.Three digital bra models(high,medium,and low support)were created using CAD and Clo3D software.Model validity was verified by comparing simulated and experimental nipple displacement.The results showed good agreement,with a root mean square error of 4.01 mm. The simulations showed that all bras significantly reduced breast displacement.The high-support model provided the best motion control.However,it also produced higher average contact pressure.The low-support bra,with its narrower straps,created localized high-pressure zones on the shoulders.The medium-support bra demonstrated the most uniform pressure distribution.As running speed increased,breast motion shifted from mainly medial-lateral displacement to dominant vertical vibration.Pressure fluctuations also intensified accordingly.Dynamic pressure analysis indicated the highest pressure peaks under the breast.The next highest pressures were on the shoulder straps and the back.It reveals that the sports bra structure significantly influences biomechanical support and pressure comfort.High-support designs effectively control breast motion but increase body-surface pressure.Medium-support designs offer sufficient support while achieving better pressure distribution,resulting in superior overall performance.This study suggests that future designs should focus on coordinated optimization of strap configuration,cup structure,and underband engineering to improve the overall wearing experience.Future research should include more diverse breast morphologies.The effects of material properties on long-term comfort should also be further investigated.