摘要
为了提高传感器测量准确度以便能更好的评估武器毁伤能力,利用分形理论分析了预紧力与接触刚度的关系,计算获得了各元件间的接触刚度,并通过建立传感器动力学模型得到了各影响因素与传感器动态特性的关系,模型结果表明,增大预紧力、减少PVDF膜的面积和降低PVDF膜、电极、盖板PET膜的厚度能有效提高传感器动态特性,最后,使用ANSYS有限元分析软件与激波管标定实验对模型准确度进行验证,在给定参数的情况下,ANSYS仿真出的固有频率大小为71.069 kHz,激波管标定实验结果为91.073 kHz,与理论模型计算结果65.277 kHz相仿,证明了模型可行性。
In order to improve the measurement accuracy of sensors and better evaluate the damage ability of weapons,this paper uses fractal theory to analyze the relationship between preload force and contact stiffness,calculates the contact stiffness between various components,and establishes a sensor dynamic model to obtain the relationship between various influencing factors and sensor dynamic characteristics.The model results show that increasing preload force,reducing the area of PVDF film,and reducing the thickness of PVDF film,electrode,and cover plate PET film can effectively improve the dynamic characteristics of sensors.Finally,the accuracy of the model is verified using ANSYS finite element analysis software and shock tube calibration experiments.Under given parameters,the natural frequency simulated by ANSYS is 71.069 kHz,and the shock wave is generated.The experimental result of tube calibration is 91.073 kHz,which is consistent with the theoretical model calculation result of 65.277 kHz,proving the feasibility of the model.
作者
徐浩鹏
孔德仁
王传志
Xu Haopeng;Kong Deren;Wang Chuanzhi(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《国外电子测量技术》
2024年第8期1-9,共9页
Foreign Electronic Measurement Technology
关键词
固有频率
接触刚度
预紧力
模态分析
激波管校准
intrinsic frequency
contact stiffness
preload
modal analysis
excitation tube calibration