摘要
针对同时采用放入式电子测压器和铜柱测压器测量一批弹药的膛压时,出现电子测压器所测压力峰值一致,而铜柱测压器所测的峰值个别出现超差的问题,在分析电子测压器测压和铜柱测压器原理的基础上,建立了铜柱测压器的ANSYS模型,并采用铜柱动态校准数据修正了铜柱JC模型参数。分析了铜柱压力出现偏差时的电子测压器测量的P-t曲线变化率,将电子测压器获得的P-t曲线作用到铜柱模型上仿真得到的变形量与实际测试一致,电子测压器测得的压力曲线更准确地反映了压力的变化过程和压力峰值。研究表明测量一批弹药时,铜柱测压器出现压力峰值偏差大的原因是由膛压上升过程变化率不同导致铜柱的应变率不同造成的。
When a batch of ammunitions are measured using internal electronic pressure gage（ IEPG） and copper cylinder pressure gage（ CCPG） at the same time,the CCPG result spreading is larger than that of IEPG. Aiming at this problem,based on analyzing the measurement principles of IEPG and CCPG,the ANSYS model of CCPG was established; the Johnson-Cook model parameters of CCPG were corrected according to the dynamic calibration data of CCPG. The P-t curve change rate tested with IEPG was analyzed when the pressure deviation for CCPG appeared. The IEPG tested pressure P-t curve was exerted on the CCPG model to obtain the simulated copper cylinder deformation,the simulated data are consistent with those of CCPG test. So the P-t curves tested with IEPG more accurately reflect the pressure changing process and the peak pressure. The study results show that the large deviation of the peak pressure measured with CCPG in the chamber pressure measurement for a batch of ammunitions is caused by the fact that different chamber pressure rising rate causes different copper cylinder strain rate during the chamber pressure rising process.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2015年第10期2290-2296,共7页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(614710385)
国防科技重点实验室基金(9140C120409)项目资助
关键词
仿真应用
火炮膛压
铜柱测压器
电子测压器
Johnson-Cook模型
simulation application
artillery chamber pressure
copper cylinder pressure gage（CCPG）
electronic pressure gage
John-son-Cook model
