薄板声辐射特性的数值模拟与分析
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摘要
基于MATLAB工程软件,研究了薄板结构在简谐激振力下的表面声压分布状况,分析了激振频率、激振位置、薄板尺寸以及薄板阻尼等因素对薄板表面声压级的影响以及规律。研究表明,激振位置对于薄板的表面声压级响应影响较小,而阻尼对于响应的影响较大,且这种影响在激振频率较高时比较明显。
Based on the MATLAB software, the surface sound pressure distribution of thin plates under harmonic excitation was discussed, and the effects of excitation frequency, excitation position, plate sizes and plate damping on the plates' surface sound pressure level were analyzed. The research shows that the excitation position has little effect on the response sound pressure level of the plate surface, while the plate damping has a remarkable influence on the response, which is greater in the cases of higher excitation frequencies.
Based on the MATLAB software, the surface sound pressure distribution of thin plates under harmonic excitation was discussed, and the effects of excitation frequency, excitation position, plate sizes and plate damping on the plates' surface sound pressure level were analyzed. The research shows that the excitation position has little effect on the response sound pressure level of the plate surface, while the plate damping has a remarkable influence on the response, which is greater in the cases of higher excitation frequencies.
引文
[1]赵志高,黄其柏,何锃.基于有限元边界元方法的薄板声辐射分析[J].噪声与振动控制,2008(1):39-43.
[2]刘从光,于德介,姚凌云,臧献国.利用附加质量载荷降低薄板声辐射[J].噪声与振动控制,2010(3):64-67.
[3]任惠娟,盛美萍.矩形薄板的模态声辐射效率[J].机械科学与技术,2010,29(10):1397-1400.
[4]林书玉.矩形薄板超声辐射器弯曲振动模式及本征频率研究[J].陕西师范大学学报(自然科学版),2000,28(3):40-46.
[5]李林凌,黄其柏,乔宇锋.薄板在不同媒质中振动及声辐射特性研究[J].华中科技大学学报(自然科学版),2007,35(3):67-69.
[2]刘从光,于德介,姚凌云,臧献国.利用附加质量载荷降低薄板声辐射[J].噪声与振动控制,2010(3):64-67.
[3]任惠娟,盛美萍.矩形薄板的模态声辐射效率[J].机械科学与技术,2010,29(10):1397-1400.
[4]林书玉.矩形薄板超声辐射器弯曲振动模式及本征频率研究[J].陕西师范大学学报(自然科学版),2000,28(3):40-46.
[5]李林凌,黄其柏,乔宇锋.薄板在不同媒质中振动及声辐射特性研究[J].华中科技大学学报(自然科学版),2007,35(3):67-69.