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Numerical simulation-based loaded inflation height modeling of nursing bed airbag

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Abstract

In previous studies, the numerical simulation models of industrial airbags were verified to have high accuracy regarding their actual dynamics. However, numerical methods were scarcely utilized to simulate and investigate the inflation height behaviors of nursing bed airbag. For this problem, this study constructs a numerical simulation model illustrating the association between the internal pressure and inflating height of nursing bed airbag, under various external loads. Firstly, based on an averaged pressure prerequisite, an airbag dynamic model is established by the control volume approach (the air inside the airbag follows the gas state equation of Poisson’s law). Besides, the elastic mechanical behaviors of airbag film material are determined according to a material constitutive model built by the quasi-static uniaxial tensile test. The obtained data are used as the boundary conditions, for the numerical dynamics modeling of the nursing bed airbag. Verification experiments clarify that this numerical modeling is accurate for describing airbag inflation behaviors, and then can be effectively applied to the design and optimization phases of nursing bed airbags. Based on the simulation modeling above, the mathematical equation of controlling airbag inflating height by its internal pressure is obtained. It provides a vital basis for the differentiated and intelligent control of the airbag nursing bed.

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Funding

The authors received the fund of the National Key R&D Program of China (No. 2021YFC0122700) and the fund of the National Nature Science Foundation of China (No.61871173).

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Authors and Affiliations

  1. State Key Laboratory for Reliability and Intelligence of Electrical Equipment, Hebei Key Laboratory of Robot Perception and Human–Robot Interaction, Hebei University of Technology, School of Mechanical Engineering, Tianjin, 300130, China

    Yunxuan Xiao, Teng Liu, Zhong Zhang, Jianjun Zhang & Shijie Guo

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  1. Yunxuan Xiao
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  2. Teng Liu
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Contributions

Yunxuan Xiao implemented the whole study and wrote the initial draft of the manuscript. Teng Liu designed the study and gave Yunxuan Xiao significant guidance about the numerical simulation modeling method of loaded airbag inflation. Zhong Zhang participated in experiment preparation and data collection. Jianjun Zhang gave crucial comments onto this work for improving its technical route. Shijie Guo contributed to analyses and interpretations of data and assisted in the model verification.

In short, all authors contributed to the study conception and design. All authors approved the final manuscript and were accountable for the study, ensuring that data generated or analyzed in this study are available.

Corresponding author

Correspondence to Teng Liu.

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Xiao, Y., Liu, T., Zhang, Z. et al. Numerical simulation-based loaded inflation height modeling of nursing bed airbag. Med Biol Eng Comput 60, 3231–3242 (2022). https://doi.org/10.1007/s11517-022-02671-4

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  • DOI: https://doi.org/10.1007/s11517-022-02671-4

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