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振動噪聲仿真分析及優化

振動噪聲仿真分析及優化服务全方位解決不同行業（汽車、船舶、軌道車輛、建築、橋梁、機械設備等）的振動噪聲工程問題點。基于全新模型构建技术建立全频段振动噪声模型，包括低频有限元/边界元模型、中频混合模型、高频统计能量模型，高精度地获取不同频段的振动噪声，通过传递路径贡献量分析、模态贡献量分析、节点贡献量分析、面板贡献量分析、声功率贡献量分析等方法对问题点进行诊断分析，快速捕捉问题点根源同时提出工程化的问题点解决方案和优化方案。

分析要點

振動噪聲問題點是各行業各領域普遍存在的問題點，也是對工程影響最大的問題點，針對這些問題點，搭建快速而准確的全頻段模型是技術難點，以往針對低頻有限元/邊界元模型網格量巨大，計算效率較低，如何簡化模型是難點；針對中頻混合模型計算精度較低，如何分解子系統建模方法（有限元或統計能量法）是難點；針對高頻統計能量模型，如何調校模型統計能量法參數是難點。建模的難點直接影響到結果的准確性，同時如何針對工程問題提出切實有效的優化方案也是重中之重。

技術優勢

第一，采用全新建模技術，面對不同行業的振動噪聲工程問題點，針對性地搭建不同頻段的模型，對于低頻一方面利用獨有簡化模型方法搭建有限元/邊界元模型，另一方面綜合聲線法、統計能量法、邊界元法提升低頻計算效率；對于中頻利用獨有的子系統分解方法，快速分解模型爲有限元板件和統計能量板件，搭建高精度的混合模型，有效提升計算准確性；對于高頻基于體系化的經驗參數，根據不同行業模型快速調用統計量能法參數數值，滿足工程計算要求。

第二，采用全新優化技術，區別于以往單純利用優化模塊進行仿真優化，本技術綜合利用體系化優化經驗和優化方法，構建從材料級到零部件級到子系統級再到複雜模型級的優化流程，全流程打通不同行業問題點的優化壁壘，使優化結果不僅有效，而且能夠對應工程應用，減重降本。

振動噪聲仿真分析及優化技术已完美應用于各個行業的振動噪聲問題點分析中，很好地解決了相關問題點。

成功案例

整車全頻段聲學包/氣動噪聲/吸隔聲仿真分析及優化：

列车/船舶全频段振動噪聲仿真分析及優化：

輪軌聲輻射仿真分析及優化：

部分項目：

永磁电机振動噪聲仿真分析及優化项目

客船/邮轮/货船/气垫船等船舶振動噪聲仿真分析及優化项目

軌道車輛降噪仿真分析及優化項目

整車聲學包仿真分析及優化項目

整車氣動噪聲仿真分析及優化項目

整車車身結構振動噪聲分析（模態/動剛度/傳函等）項目

前圍/地板隔聲分析及優化項目

電梯氣動噪聲仿真分析及優化項目

橋梁聲輻射仿真分析及優化項目

管道聲輻射仿真分析及優化項目

輪軌聲輻射降噪分析項目

動力總成聲輻射仿真分析及優化項目

聲學玻璃隔聲分析項目

聲學材料吸隔聲分析項目

電池包靜力學/動力學/結構疲勞仿真分析及優化項目

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全方位解決不同行業（汽車、船舶、軌道車輛、建築、橋梁、機械設備等）的振動噪聲工程問題點。

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