第一作者沈文厚男，博士生，讲师，1972年12月生

拦阻索冲击的多体动力学仿真研究

沈文厚1,2，赵治华1，任革学1，王宁羽1

(1.清华大学航天航空学院，北京100084；2. 海军航空兵学院，辽宁葫芦岛125001)

摘要：舰载机着舰时，尾钩冲击拦阻索导致索内应力动态向甲板两端传播。为研究拦阻索应力波传播规律及峰值决定因素，本文在多体动力学框架下，发展了基于绝对节点坐标法的具有接触碰撞功能的大位移索单元，在此基础上建立了包含缓冲装置的拦阻系统多体动力学模型，仿真揭示了拦阻索受冲击后应力波在传播过程中，分别在甲板两侧的导向轮和尾钩处，因横波的反射与叠加均造成了应力尖峰，而滑轮缓冲装置与钢索末端缓冲装置均能有效的降低索内应力峰值。拦阻系统中的钢索用轻质材料代替，亦能降低索内应力峰值。此外，建立的全尺寸舰载机拦阻系统多体动力学模型为系统的设计与优化提供了一种计算手段。

关键词：拦阻索；多体动力学；冲击；应力波

基金项目：中国博士后基金(2012M510417)

收稿日期：2013-09-12修改稿收到日期：2014-03-12

中图分类号:O3文献标志码：A

Multi-body dynamic simulation of impact on cross deck pendant

SHENWen-hou1,2,ZHAOZhi-hua1,RENGe-xue1,WANGNing-yu1(1. School of Aeronautics & Astronautics, Tsinghua University, Beijing 100084, China；2. Naval Aviation Institute, Huludao 125001, China)

Abstract:When an aircraft is landing on an aircraft-carrier, the impact stress generated at the moment of its tail-hook arresting cross deck pendant propagates to both ends of the wire rope. To simulate and understand the governing law of this stress wave, a cable element with contact and large displacement functions was developed based on absolute nodal coordinate formulation under the framework of multi-body dynamics. And then a multi-body dynamic model of the whole arresting system was built. The results of simulation showed that stress peaks are caused by reflection and superposition of transverse waves at deck sheaves and carrier-based aircraft tail-hook, after the tail-hook arrests the cross deck pendant; damping sheave installation can reduce stress peak effectively, and replacing the steel rope with lightweight material also weakens the stress peak. The multi-body model of full-size arresting system built here provided an effective simulation way to assist the design and optimization of the whole arresting system.

Key words:cross deck pendant; multi-body dynamics; impact; stress wave

受航母飞行甲板长度限制，舰载机须借助拦阻装置完成着舰。目前各国航母上多装备MK7型拦阻系统，如图1所示，位于甲板上方的拦阻索初始微张紧，受舰载机尾钩冲击及拖拽后逐渐将盘绕于甲板下方动滑轮组上的绳索放出，同时液压机构对动滑轮施加阻力将飞机拦停。整个拦截过程中索内应力前期由尾钩冲击形成的应力波传播与反射、叠加主导，后期冲击衰减由液压阻力主导。……