基于冲量定理的高速空投假人最大动载计算模型研究

假人高速空投试验旨在评估开伞过程中人体所受最大动载,由于该试验重复性差、成本高,有必要建 立计算模型为系统设计提供理论依据。基于冲量定理建立最大动载计算模型,计算特定空投条件下假人最大 动载;选取某典型假人高速空投系统作为算例,开展基于多体动力学的系统仿真,并根据仿真结果确定计算模 型的关键参数,给出最大动载计算模型的数学表达式。结果表明:本文模型可以快速有效确定假人最大动载, 评估救生伞系统安全性,具有较高的工程应用价值。

Research on the maximum dummy overlord calculation model of high speed airdrop based on the theorem of impulse

The purpose of the dummy high speed airdrop test is to evaluate the maximum overload on the human body during the process of opening the parachute. Due to the poor repeatability and high cost of the test, it is necessary to establish a calculation model to provide theoretical basis for the system design. Based on impulse theorem, the maximum dummy overload calculation model is established to calculate the maximum dummy overlord quickly under a certain airdrop condition. The typical high speed airdrop system is selected as the instance to conduct the system simulation based on multi-body dynamics. The key parameters of the calculation model are determined by simulation results, and the mathematical expressions of the maximum dummy overlord calculation model are given. The results show that the calculation model can quickly and effectively determine the maximum dummy overlord, evaluate the safety of the life-saving parachute system, and has high engineering application value.