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首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.1; 20051026-28; Nanjing(CN) >Underwater Human Model and Experiment Validation
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Underwater Human Model and Experiment Validation

机译：水下人体模型和实验验证

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摘要

Neutral buoyancy training is the basic training for astronauts who will perform extravehicular activity (EVA). The difference between neutral buoyancy and real space should be thoroughly understood in order to improve the fidelity of space task training. Detailed experimental records are needed, including space activity records. Obviously, the experimental cost will be very high. Computer simulation offers an attractive alternative. In this study, a sophisticated eleven-segment model was developed to study suited human motions underwater. The model was constructed using the software ADAMS, and depending on the motion of interest, the degrees of freedom can be easily changed, making the model highly versatile. The modified form of Morison's equation was used to evaluate the hydrodynamic forces. The model can be utilized to compare the difference between neutral buoyancy and real space conditions. The latter can be easily realized just by deactivating the ballasts and the hydrodynamic forces. This model has also been used for ballasts position design and the ballasts scheme was validated by an underwater experiment. The simulation animations are consistent with some experimental videos. Simulation results show that the hydrodynamic forces significantly affect subject's joint torque, but become negligible when suit constraints are considered.
机译：中性浮力训练是将进行舱外活动（EVA）的宇航员的基本训练。应该彻底了解中性浮力与实际空间之间的差异，以提高空间任务训练的保真度。需要详细的实验记录，包括空间活动记录。显然，实验成本会很高。计算机模拟提供了一种有吸引力的选择。在这项研究中，开发了一个复杂的十一段模型来研究水下合适的人体运动。该模型是使用ADAMS软件构建的，根据感兴趣的运动，可以轻松更改自由度，从而使该模型具有很高的通用性。莫里森方程的修改形式用于评估流体动力。该模型可用于比较中性浮力和实际空间条件之间的差异。仅通过使压载物和流体动力失效就可以容易地实现后者。该模型也已用于镇流器位置设计，并且通过水下实验验证了镇流器方案。模拟动画与一些实验视频一致。仿真结果表明，流体动力显着影响受试者的关节扭矩，但当考虑服从约束时，其可忽略不计。

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