Contact of ropes and orthotropic rough surfaces

Contact of ropes and orthotropic rough surfaces
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绳索与各向异性粗糙表面的接触

DOI:
10.1002/zamm.201300129
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发表时间:
2013
期刊:
ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik
影响因子:
--
通讯作者:
Konyukhov A.
Konyukhov A.
中科院分区:
--
文献类型:
--
作者:
Konyukhov A.

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任意弯曲绳索与任意弯曲粗糙正交各向异性表面之间的接触已从几何角度进行了修改。首先,通过以达布基表示的 Karush-Kuhn-Tucker 条件,使用摩擦接触约束的一致变分包含,推导了正交各向异性粗糙表面上绳索平衡的变分方程。然后,根据正交各向异性库仑摩擦的粘着-滑动条件,导出粗糙表面上绳索的静力学和动力学的微分方程组。绳索在粗糙表面上的静平衡过程中发现满足三个标准:“无分离”、拖动摩擦系数的条件以及绳索末端切向力的不等式。对于常曲率的曲线和曲面,极限切向载荷仍然保留著名的“欧拉视图”T = T0e± ω s。结果表明,粗糙正交各向异性曲面的最大张力曲线是测地线。在满足滑动标准且“无分离”的情况下导出运动方程。具有导出系统解析解的各种情况,包括欧拉情况和圆柱体上的螺旋绳,都作为导出理论的应用示例。
Contact between arbitrary curved ropes and arbitrary curved rough orthotropic surfaces has been revised from the geometrical point of view. Variational equations for the equilibrium of ropes on orthotropic rough surfaces are derived, first, using the consistent variational inclusion of frictional contact constraints via Karush‐Kuhn‐Tucker conditions expressed in Darboux basis. Then, the systems of differential equations are derived for both statics and dynamics of ropes on a rough surface depending on the sticking‐sliding condition for orthotropic Coulomb's friction. Three criteria are found to be fulfilled during the static equilibrium of a rope on a rough surface: “no separation”, condition for dragging coefficient of friction and inequality for tangential forces at the end of the rope. The limit tangential loads still preserve the famous “Euler view” T = T0e± ω sfor the curves and surfaces of constant curvature. It is shown that the curve of the maximum tension of a rough orthotropic surface is geodesic. Equations of motion are derived in the case if the sliding criteria is fulfilled and there is “no separation”. Various cases possessing analytical solutions of the derived system, including Euler case and a spiral rope on a cylinder are shown as examples of application of the derived theory.
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