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    • 一种金属薄壳膨胀系统动态特性研究

    Guixiang LIU,Song LIN,Xin LI,Kun ZHANG,Jianzhong MA,Lei SUN

    重庆理工大学学报（自然科学版）（2017）

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    Abstract
    基于非线性动力学有限元程序LS-DYNA,对某金属薄壳膨胀系统动态膨胀过程进行了数值模拟,分析了非均布内压载荷参数对该系统膨胀特性的影响,获得了内压载荷参数对系统膨胀特性的影响规律.在此基础上,提出了一种调节膨胀系统内压载荷的基本方法,使得外围刚体具有较好的运动速度及姿态.最后,在相同的非均布内压载荷下,分析了系统中各子部件对金属薄壳膨胀系统动态特性的影响,给出了其对金属薄壳及外围多刚体动态变形及运动的影响规律.
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    • Pretraining has recently greatly promoted the development of natural language processing (NLP)
    • We show that M6 outperforms the baselines in multimodal downstream tasks, and the large M6 with 10 parameters can reach a better performance
    • We propose a method called M6 that is able to process information of multiple modalities and perform both single-modal and cross-modal understanding and generation
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    【要点】：论文通过数值模拟和实验分析研究了薄金属壳扩张系统的动态特性，提出了一种调整内部压力负载参数的方法，以优化系统扩张特性。
    

    【方法】：采用LS-DYNA非线性动态有限元程序对金属壳扩张过程进行数值模拟，并分析了非均匀内部压力对系统扩张特性的影响。
    

    【实验】：在非均匀内部压力条件下，研究了各子组件对金属壳扩张系统动态特性的影响，并获取了金属壳及多刚体动态变形和运动的规律。实验使用的数据集为金属壳扩张系统内部压力和动态特性数据集，结果揭示了负载参数调整对系统动态特性的影响。