材料物性热效应对统计能量分析参数的影响

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Abstract The environment temperature changes the material property and then the statistical energy analysis (SEA) parameters. It is necessary to study the effect of temperature-dependent material property on the SEA parameters before the establishment of a SEA model with the consideration of temperature. Firstly, the model of an L-shaped plate was created, which is simple supported at all sides. Secondly, the rain-on-the-roof load was applied on one plate of the L-shaped plate, and the frequency-averaged input power of load as well as the vibration energy of each sub-system at different temperatures corresponding to different mode sets were obtained based on the energy flow models. The effect of temperature-dependent material property is considered. Finally, the damping loss coefficient and coupling loss coefficient are defined by the product of the central frequency and the damping loss factor/coupling loss factor, respectively, were obtained based on the power injection method. Results show that the global modal density and the frequency-averaged input power of the rain-on-the-roof load are changing with the temperature and they have the contrary trend with the elastic modulus of L-shaped plate verse temperature; the damping loss coefficients and coupling loss coefficients are changing with the temperature and they have the same trend with the elastic modulus of L-shaped plate verse temperature.

Key words： statistical energy analysis temperature effect coupling loss factor power injection method the energy flow models

Received: 28 October 2015 Published: 15 December 2016

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	Articles by authors
	ZHANG Peng1
	2
	FEI Qing-guo1
	2
	LI Yan-bin1
	2
	WU Shao-qing1
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Cite this article:

ZHANG Peng1,2,FEI Qing-guo1, et al. Effect of temperature-dependent material property on the statistical energy analysis parameters[J]. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(24): 73-78.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2016/V35/I24/73

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