基于正交仿真试验的柔性网开网参数评估方法

Parameter Evaluation Method of Flexible NetBased on Orthogonal Simulation Test

摘要:

针对短时高动态、流固耦合现象严重导致柔性网低空展开过程不确定性问题,提出一种综合运用极差法与方差法的参数评估方法。对影响柔性网空中开网效果的弹体速度、弹射角度、牵引头质量、弹射速度、弹道倾角等5项参数开展灵敏度研究,评估开网参数对开网性能的影响。仿真试验结果表明,柔性网展开面积主要取决于弹射速度、弹射角度及牵引头质量；柔性网滞空时间与牵引头质量、弹射速度、弹射角度均呈负相关关系；柔性网有效拦截面积与牵引头质量、弹射速度、弹射角度均呈正相关关系。该方法能够减少试验运算和数据处理工作量,可有效应用于非线性、高动态的柔性网空中开网过程控制参数灵敏度分析,可为柔性网开网参数设计提供理论支撑。

Abstract:

In order to solve the problem of uncertainty in the deployment process of flexible net at low altitude caused by short-time high dynamic and fluid structure coupling phenomenon, a parameter evaluation method based on orthogonal experimental design theory was proposed. Using range method and variance method, the sensitivity due to five parameters, such as projectile velocity, ejection angle, tractor mass, ejection speed and trajectory inclination angle, which affect the air opening effect of flexible net, were studied, and the influence of opening parameters on the performance of open mesh was evaluated. The simulation results show that the developed area of the flexible net mainly depends on the ejection speed, ejection angle and the mass of the tractor; the hang time of the flexible net is negatively correlated with the mass, velocity and angle of the tractor; the effective interception area of the flexible net is positively correlated with the mass, velocity and angle of the tractor. This method can reduce the workload of experimental calculation and data processing, and can be effectively applied to the sensitivity analysis of nonlinear and high dynamic opening process control parameters of flexible net. It can provide theoretical support for parameter design of flexible net.