| 基于时域有限差分的渐变温信号传输模型 |
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| 引用本文： | 门秀花,李舜酩,宋方臻,徐佳.基于时域有限差分的渐变温信号传输模型[J].航空动力学报,2014,29(4):887-893. |
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| 作者姓名： | 门秀花 李舜酩 宋方臻 徐佳 |
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| 作者单位： | 济南大学 机械工程学院, 济南 250022;南京航空航天大学 能源与动力学院, 南京 210016;济南大学 机械工程学院, 济南 250022;中国航空工业集团公司 西安飞机工业(集团)有限责任公司, 西安 710089 |
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| 基金项目： | 山东省优秀中青年科学家科研奖励基金（BS2011ZZ001）； 济南大学校博士基金（XBS1003） |
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| 摘 要： | 建立了一种基于时域有限差分(FDTD)的渐变温信号传输模型,利用迭代求解实现了传输导线在不同时间受不同温度影响的仿真分析.结果表明:测试信号的时域平均电压幅值随温度的升高而逐渐衰减,在573K时,电压幅值仅为303K时的90%左右,衰减幅度近10%.设计了一种渐变温环境下的振动测试试验,所得的输出信号的自功率谱峰值和时域平均电压幅值均随温度升高而减少,试验结果与仿真分析结果一致.此研究结果有助于提高振动测试的准确性.
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| 关 键 词： | 振动测试 信号传输 渐变温模型 时域有限差分 信号幅值 |
| 收稿时间： | 2013/1/23 0:00:00 |
Signal transmission model with gradient temperature based on finite difference time domain |
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| MEN Xiu-hu,LI Shun-ming,SONG Fang-zhen and XU Jia.Signal transmission model with gradient temperature based on finite difference time domain[J].Journal of Aerospace Power,2014,29(4):887-893. |
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| Authors: | MEN Xiu-hu LI Shun-ming SONG Fang-zhen and XU Jia |
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| Institution: | School of Mechanical Engineering, University of Jinan, Jinan 250022;College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;School of Mechanical Engineering, University of Jinan, Jinan 250022;Xi'an Aircraft Industry(Group) Company Limited, Aviation Industry Corporation of China, Xi'an 710089, China |
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| Abstract: | A signal transmission model with gradient temperature was established on the basis of finite difference time domain(FDTD) method. And then, an iterative solution was applied to realize the signal transmission with different temperatures at different times. It shows that the time domain average voltage amplitude of output signal gradually attenuates with temperature rise, and at 573K the voltage amplitude is only about 90% of that of 303K, with the attenuation rate nearly 10%. The corresponding vibration test with gradient temperature was conducted. The power spectrum peak and time domain average voltage amplitude of output signal gradually reduce with temperature rise, which is consistent with the results of proposed model. The results of study will help to improve the accuracy of vibration test. |
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| Keywords: | vibration test signal transmission gradient temperature model finite difference time domain signal amplitude |
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