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Simulating Underwater Plasma Sound Sources to Evaluate Focusing Performance and Analyze Errors
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作者 马天 黄建国 +2 位作者 雷开卓 陈建峰 张群飞 《Journal of Marine Science and Application》 2010年第1期75-80,共6页
Focused underwater plasma sound sources are being applied in more and more fields. Focusing performance is one of the most important factors determining transmission distance and peak values of the pulsed sound waves.... Focused underwater plasma sound sources are being applied in more and more fields. Focusing performance is one of the most important factors determining transmission distance and peak values of the pulsed sound waves. The sound source’s components and focusing mechanism were all analyzed. A model was built in 3D Max and wave strength was measured on the simulation platform. Error analysis was fully integrated into the model so that effects on sound focusing performance of processing-errors and installation-errors could be studied. Based on what was practical, ways to limit the errors were proposed. The results of the error analysis should guide the design, machining, placement, debugging and application of underwater plasma sound sources. 展开更多
关键词 underwater plasma sound source focusing sound field error analysis 3D Max
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脉冲参数对深水桥梁高桩基础地震响应的影响 被引量:3
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作者 江辉 王宝喜 +1 位作者 李辰 王敏 《华中科技大学学报(自然科学版)》 EI CAS CSCD 北大核心 2018年第6期86-93,共8页
以某大型深水梁式桥为背景,采用改进的附加质量简化算法模拟动水效应,建立高桩基础主墩的数值分析模型.生成包含脉冲型低频运动的近断层地震动,开展了多工况下的动力时程分析,系统讨论并提炼了脉冲峰值A、脉冲形状参数γ、脉冲相位v和... 以某大型深水梁式桥为背景,采用改进的附加质量简化算法模拟动水效应,建立高桩基础主墩的数值分析模型.生成包含脉冲型低频运动的近断层地震动,开展了多工况下的动力时程分析,系统讨论并提炼了脉冲峰值A、脉冲形状参数γ、脉冲相位v和脉冲频率fp等四类参数对结构地震响应的影响规律.结果表明:结构动力响应随A增大而近似线性增大,随γ和fp增大均先增大后减小,随v增大先减小而后增大.结合反应谱分析可发现:四类脉冲参数的影响方式、范围和强度各有差异,结构自振特性与地震波频谱特性间的相关性是影响结构响应的重要因素.对于近断层甚至跨断层深水桥梁的抗震设计,有必要综合分析潜在的脉冲型地面运动的影响. 展开更多
关键词 深水桥梁 群桩基础 近断层地震动 脉冲模拟模型 脉冲参数 地震响应
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