| 温度变化对振动信号传输的影响分析 |
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| 引用本文： | 门秀花,李舜酩.温度变化对振动信号传输的影响分析[J].南京航空航天大学学报,2009,41(1). |
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| 作者姓名： | 门秀花 李舜酩 |
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| 作者单位： | 南京航空航天大学能源与动力学院,南京,210016 |
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| 基金项目： | 国家自然科学基金，航空科学基金，江苏省自然科学基金 |
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| 摘 要： | 针对高温振动测试过程中出现的信号传输不稳定问题,建立了热电耦合模型,研究了高温环境对信号稳定传输所产生的影响.在相关热电磁理论的基础上,采用有限元方法建立了分析模型,电信号传输过程中产生的焦耳热与对流换热的共同作用,造成了传输线的温升.依据电信号-温度灵敏度变化关系,得出了外部环境的对流换热系数变化影响电信号传输的规律,建立了相应的误差公式估算输入与输出电信号响应之间的关系.研究结果表明:输入信号有效值越大,导体温升越大,输出与输入电信号间的偏离误差越大.并进一步确定了电信号稳定性传输的影响因素,为提高高温环境下结构测试的准确性提供了有效方法.
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| 关 键 词： | 传输线 有限元方法 电信号 高温 稳定性 |
Simulating Analysis of Vibrated Signal Transmission in Changing Temperature Environment |
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| Men Xiuhua,Li Shunming.Simulating Analysis of Vibrated Signal Transmission in Changing Temperature Environment[J].Journal of Nanjing University of Aeronautics & Astronautics,2009,41(1). |
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| Authors: | Men Xiuhua Li Shunming |
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| Institution: | College of Energy and Power Engineering;Nanjing University of Aeronautics & Astronautics;Nanjing;210016;China |
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| Abstract: | Aimed at instability of signal transmission in the process of high temperature measurement,a thermal-electric coupled model is established to analyze the effect from high temperature environment on the signal steady transmission.The coupled physics field model is established using the finite element method based on related thermal and electromagnetic theory.The common action from the heat convection and Joule heat leads to the temperature rise of the transmission line.According to the sensitivity relationsh... |
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| Keywords: | transmission line finite element method electric signal high temperature stability |
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