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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part C. Journal of mechanical engineering science >A novel thermo-flexible coupled dynamics analysis method of planar deployable structures in the deploying process
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A novel thermo-flexible coupled dynamics analysis method of planar deployable structures in the deploying process

机译：一种新型热柔性耦合动力学分析方法的部署过程中的平面可部署结构

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摘要

The temperature-induced vibration of deployable structures caused by the temperature gradient due to heat flux from the solar radiation is a major factor that results in a significant effect on synchronism of the deploying motion. In this paper, a coupled thermo-flexible dynamics analysis method of deployable structures is presented. In this method, the temperature field of thin-walled rectangular tube element subjected to the solar radiation is established by the linear interpolation functions and the proposed high-order polynomials. The two methods, respectively, are used to approximate the axial and circumferential temperature distributions. Then, the dynamics equations of the tube element are derived by the extended absolute node coordinate formulation with the temperature field inset and verified by comparing with ANSYS. Next, the coupled thermo-flexible dynamics equations of the deploying mechanisms are assembled by the virtue of rods and constraint conditions. Finally, the deployable structure with three scissor-like units is analyzed as a numerical example. The simulation results show that the thermal loading has a significant impact on the displacement, straightness, and driving force due to thermally induced bends and vibrations and the incidence angle of the solar radiation is a key parameter to determine the different aspects of the temperature influence.
机译：由来自太阳辐射的热通量引起的温度梯度引起的可展开结构的温度诱导的振动是导致对部署运动同步的显着影响的主要因素。本文介绍了可展开结构的耦合热柔性动力学分析方法。在该方法中，通过线性插值功能和所提出的高阶多项式建立经受太阳辐射的薄壁矩形管元件的温度场。这些方法分别用于近似轴向和周向温度分布。然后，管元件的动态方程由延伸的绝对节点坐标配方导出，其中温度场插入并通过与ANSYS比较来验证。接下来，展开机构的耦合热柔性动力学方程被杆和约束条件组装。最后，分析了具有三个剪刀状单元的可展开结构作为数值示例。模拟结果表明，由于热诱导的弯曲和振动，热负荷对位移，直线度和驱动力产生显着影响，并且太阳辐射的入射角是确定温度影响的不同方面的关键参数。

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