为表征粗粒级膏体充填材料的抗离析性能，基于固液两相流体力学及非牛顿流体力学，对粗颗粒的静动态受力进行分析，构建膏体充填料浆静动态抗离析力学模型。综合考虑浆体屈服应力、粗颗粒粒级分配和固液密度，提出抗离析性能表征模型，...为表征粗粒级膏体充填材料的抗离析性能，基于固液两相流体力学及非牛顿流体力学，对粗颗粒的静动态受力进行分析，构建膏体充填料浆静动态抗离析力学模型。综合考虑浆体屈服应力、粗颗粒粒级分配和固液密度，提出抗离析性能表征模型，即离析判定值M。为检测该模型，以料浆浓度、粗颗粒最大粒径、尾碎比为三因素，进行9组正交实验，并对实验结果进行拟合分析。研究结果表明：离析判定值 M 的预测结果与实际结果一致，其中，M的最大值Mmax和M的平均值Mavg的拟合复相关参数均达到0.9以上，模型具有可靠性。合理选取粗颗粒粒径计算标准，即可实现对粗粒级膏体料浆抗离析性能的准确预测。建议离析判定值Mavg为1.0-2.5，离析判定值Mmax为1.0-1.2。展开更多
Rigid blocking masses are located in the typical base structure of a power cabin based on the impedance mismatch principle.By combining the acoustic-structural coupling method and statistical energy analysis,the full-...Rigid blocking masses are located in the typical base structure of a power cabin based on the impedance mismatch principle.By combining the acoustic-structural coupling method and statistical energy analysis,the full-band vibration and sound radiation reduction effect of vibration isolation masses located in a base structure was researched.The influence of the blocking mass’ cross-section size and shape parameters and the layout location of the base isolation performance was discussed.Furthermore,the effectiveness of rigid vibration isolation design of the base structure was validated.The results show that the medium and high frequency vibration and sound radiation of a power cabin are effectively reduced by a blocking mass.Concerning weight increment and section requirement,suitably increasing the blocking mass size and section height and reducing section width can result in an efficiency-cost ratio.展开更多
文摘为表征粗粒级膏体充填材料的抗离析性能，基于固液两相流体力学及非牛顿流体力学，对粗颗粒的静动态受力进行分析，构建膏体充填料浆静动态抗离析力学模型。综合考虑浆体屈服应力、粗颗粒粒级分配和固液密度，提出抗离析性能表征模型，即离析判定值M。为检测该模型，以料浆浓度、粗颗粒最大粒径、尾碎比为三因素，进行9组正交实验，并对实验结果进行拟合分析。研究结果表明：离析判定值 M 的预测结果与实际结果一致，其中，M的最大值Mmax和M的平均值Mavg的拟合复相关参数均达到0.9以上，模型具有可靠性。合理选取粗颗粒粒径计算标准，即可实现对粗粒级膏体料浆抗离析性能的准确预测。建议离析判定值Mavg为1.0-2.5，离析判定值Mmax为1.0-1.2。
基金Supported by the International Cooperation Program under Grant No.2007DFR80340the National Natural Science Foundation of China under Grant No.50779007
文摘Rigid blocking masses are located in the typical base structure of a power cabin based on the impedance mismatch principle.By combining the acoustic-structural coupling method and statistical energy analysis,the full-band vibration and sound radiation reduction effect of vibration isolation masses located in a base structure was researched.The influence of the blocking mass’ cross-section size and shape parameters and the layout location of the base isolation performance was discussed.Furthermore,the effectiveness of rigid vibration isolation design of the base structure was validated.The results show that the medium and high frequency vibration and sound radiation of a power cabin are effectively reduced by a blocking mass.Concerning weight increment and section requirement,suitably increasing the blocking mass size and section height and reducing section width can result in an efficiency-cost ratio.
