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首页> 外文期刊>International journal of non-linear mechanics >Unwinding motion of cable by taking into consideration effect of bending on cable
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Unwinding motion of cable by taking into consideration effect of bending on cable

机译：考虑弯曲对电缆的影响，电缆的退绕运动

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One of the most important factors influencing the performance of wire-guided missiles is the ability to exchange information through a connected cable. Some of the problems that occur during the process of unwinding the cable from the spool package are tangling of the cable because of low tensile force at the guide-eyelet point and cutting of the cable because of high tensile force. Therefore, it is important to analyze the transient motion of the unwinding cable withdrawn from the spool package, while considering the effect of flexural rigidity on the cable. The unwinding system is defined with cylindrical coordinates, and Hamilton's principle in an open system is introduced to represent the mass change of the cable in the control volume. Using Hamilton's principle, which takes into consideration the Lagrangian, virtual work, and virtual momentum transport, the unwinding equation with high non-linearity can be derived using boundary conditions. Further, by assuming inextensibility, the tensile force can be derived for the spatial variable. To solve the unwinding equation numerically, Newmark implicit integration is utilized with the central finite-difference approximation for spatial variables. The motions of the cable can be ascertained on the basis of various initial tensile forces by considering the constant unwinding velocity at the guide-eyelet point in air and water. It can be concluded from these motions that fluid resistance is the dominant force on the cable when it is unwound in the water, and, in contrast, centrifugal force is dominant in the air. Further, it can be observed that the initial tensile force required when the cable is unwound in water is greater than that required in air, to avoid unwinding problems such as tangling and cutting of the cable.
机译：影响线制导弹性能的最重要因素之一是通过连接的电缆交换信息的能力。在从线轴包装中退绕电缆的过程中出现的一些问题是，由于在导向孔眼点处的拉力较低，因此使电缆缠结，并且由于高的拉伸力而导致了电缆的切割。因此，在考虑挠曲刚度对电缆的影响的同时，分析从线轴组件中拉出的退绕电缆的瞬态运动非常重要。放卷系统用圆柱坐标定义，并在开放系统中引入汉密尔顿原理来表示控制体积中电缆的质量变化。使用汉密尔顿原理，其中考虑了拉格朗日，虚拟功和虚拟动量传递，可以使用边界条件导出具有高非线性度的展开方程。此外，通过假设不可伸长性，可以导出用于空间变量的拉力。为了用数值方法求解展开方程，将Newmark隐式积分与空间变量的中心有限差分近似结合使用。可以通过考虑在空气和水中的导向孔眼点处的恒定退绕速度，基于各种初始拉力来确定电缆的运动。从这些运动可以得出结论，当电缆在水中解开时，流体阻力是电缆上的主导力，相反，在空气中，离心力是主导力。此外，可以观察到，当在水中展开电缆时所需的初始张力大于在空气中所需的初始张力，以避免展开问题，例如电缆的缠结和切割。

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