材料物性热效应对统计能量分析参数的影响

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (24) : 73-78.

论文

材料物性热效应对统计能量分析参数的影响

张鹏1,2，费庆国1,2，李彦斌1,2，吴邵庆1,2

作者信息 +

Effect of temperature-dependent material property on the statistical energy analysis parameters

ZHANG Peng1,2 , FEI Qing-guo1,2 ,LI Yan-bin1,2 , WU Shao-qing1,2

Author information +

文章历史 +

摘要

高温环境会引起系统的统计能量分析参数发生变化，原因之一是温度改变了材料物性。为建立计及材料物性热效应的统计能量分析模型，有必要先研究材料物性热效应对统计能量分析参数的影响。针对四周简支的L形折板结构，在一板上施加雨流载荷（rain-on-the-roof），计及材料物性热效应，基于能量流模型分析得到子结构不同温度下对应于特定模态群的载荷的平均输入功率及各子系统的平均振动能量，再基于PIM理论分析得到由内损耗因子、耦合损耗因子与频带中心频率的乘积定义的参数：内损耗系数、耦合损耗系数。研究结果表明：整体模态密度、雨流载荷的平均输入功率与板材面内弹模随温度的变化趋势相反；内损耗系数、耦合损耗系数与板材面内弹模随温度的变化趋势相同。

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.

导出引用

张鹏1,2，费庆国1,2，李彦斌1,2，吴邵庆1,2. 材料物性热效应对统计能量分析参数的影响[J]. 振动与冲击, 2016, 35(24): 73-78

ZHANG Peng1,2,FEI Qing-guo1,2,LI Yan-bin1,2,WU Shao-qing1,2. 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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