针对目前密闭空间内瞬态高压高温燃爆场测试中无法有效获取多点压力信息，该文在压力测试仪的基础上，研制量程为600 MPa，抗3200 K瞬时高温的多点压力测试系统。测试系统的塑料光纤传光器件、高强度光窗、屏蔽薄膜，使其能适应密闭空间内瞬态高压高温燃爆场测试环境。通过测试系统多路光纤的光触发信号，同步多个测试仪工作的同时，可使测试系统在强电磁环境下对多点进行压力测试。运用有限元仿真软件LS-DYNA，对密闭空间内瞬态高压高温燃爆场进行压力仿真并获取多点的压力信息，仿真结果与已有的实验数据吻合较好；某些区域压力有多个峰值，某些区域间波形差异很大，这些区域压力特性可为测压器的布置数量与位置提供参考。%Presently, multi-point pressure information cannot be obtained in the test of high pressure and temperature transient explosion fields in confined space. To solve this problem, this paper has designed a multi-point pressure testing system based on the pressure tester. This 600 MPa system can be used at a transient temperature of 3 200 K. The system is adaptive to severe testing environments due to its plastic optical fiber, high strength optical window and electromagnetic shielding film. The light -triggered signals from multiplex optical fibers are measured to synchronize the work of multiple testers and help the system to get the pressure information at different points under strong electromagnetic environment. LS-DYNA, namely finite element simulation software, is used to simulate the pressure at transient high-pressure high-temperature burning and explosion fields within confined space and obtain multi-point pressure information. The simulation results agree with existing experimental data. The pressure of some regions has several peaks, and there is a big difference between the waveforms of some regions. The pressure characteristics of these regions can be used as a reference for determining the numbers and positions of pressure measuring devices.
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