冲击波压力传感器寄生效应抑制方法研究

发布时间：2018-12-16 11:31

【摘要】：战斗部爆炸冲击波测试技术是战斗部威力评价的重要研究内容,也是目标毁伤效果评估的重要依据。在评价战斗部毁伤效应时,必须对冲击波压力进行有效测试。本文基于爆炸场寄生效应对压电式压力传感器测量冲击波造成的寄生输出,开展了冲击波压力传感器寄生效应抑制方法研究。在分析爆炸场机械冲击和振动产生机理的基础上,建立冲击波压力传感器振动力学模型。基于冲击和振动对不同环境下冲击波压力测试造成的影响,分别设计了地面反射压测量传感器安装组件和壁面反射压测量传感器安装组件,通过理论建模和数值仿真分析该安装组件的抑制效果;利用ANSYS Workbench平台仿真,探讨了安装组件在冲击载荷和振动载荷下的抑制效果,完成了安装组件隔振材料的选型;开展力锤敲击模拟实验,分析了安装组件抑制机械冲击的性能。在分析爆炸场热冲击产生机理的基础上,提出了一种在传感器敏感面涂抹硅脂的隔热方法,通过理论计算和热力学仿真,确定了具有最佳抑制效果的隔热层厚度;通过热水冲击模拟实验,分析涂抹硅脂的抑制性能。最后,基于所采用的寄生效应抑制措施,开展爆炸场冲击波压力测试试验,通过对实测信号的数据处理与分析,探讨抑制措施的合理性。试验结果表明,本文所设计的可抑制冲击和振动的传感器安装组件及采用的隔热方法是有效的,具有实际应用价值,为提高战斗部冲击波压力测试结果可靠性提供了一种有效的方法。
[Abstract]:The explosive shock wave test technology is an important research content of warhead power evaluation, and is also an important basis for target damage evaluation. When evaluating warhead damage effect, shock wave pressure must be tested effectively. Based on the parasitic effect of explosion field on measuring the parasitic output of shock wave by piezoelectric pressure sensor, the suppression method of parasitic effect of shock wave pressure sensor is studied in this paper. On the basis of analyzing the mechanism of mechanical shock and vibration in explosion field, the vibration dynamic model of shock wave pressure sensor is established. Based on the effect of shock and vibration on shock wave pressure measurement in different environments, the installation assembly of ground reflection pressure sensor and wall reflection pressure measurement sensor are designed, respectively. Through theoretical modeling and numerical simulation, the suppression effect of the assembly is analyzed. By using ANSYS Workbench platform simulation, the restraining effect of installation components under impact load and vibration load is discussed, the type selection of vibration isolation material is completed, the simulation experiment of force hammer beating is carried out, and the performance of mechanical shock suppression of installation components is analyzed. Based on the analysis of the mechanism of thermal shock in the explosion field, a method of coating silicon grease on the sensitive surface of the sensor is proposed. The thickness of the thermal insulation layer with the best inhibition effect is determined by theoretical calculation and thermodynamic simulation. Through hot water impact simulation experiment, the inhibition performance of applying silicone grease was analyzed. Finally, based on the parasitic effect suppression measures adopted, the shock wave pressure test of explosion field is carried out, and the rationality of the suppression measures is discussed through the data processing and analysis of the measured signals. The experimental results show that the sensor assembly designed in this paper, which can suppress shock and vibration, and the heat insulation method used in this paper are effective and have practical application value. It provides an effective method to improve the reliability of shock wave pressure test results of warhead.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212

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