节点分析法的基本思路为什么可以用代数和i=ug，不考虑电压方向？

来源：蜘蛛抓取(WebSpider) 时间：2018-08-16 13:08 标签： 网孔分析法
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[物理]第2章网孔分析和节点分析方法
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微车后桥壳声—固耦合振动及轻量化分析-analysis of acoustic-solid coupling vibration and lightweight of rear axle housing of micro - vehicle.docx 74页
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微车后桥壳声—固耦合振动及轻量化分析-analysis of acoustic-solid coupling vibration and lightweight of rear axle housing of micro - vehicle
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In recent years, along with the rapid development of the society also got rapid development of automobile industry, automobile vibration and noise and comfort has been the issues of common concern to automotive engineering. Traditional method is by increasing the thickness of the structure can prevent the spread of sound waves to a certain extent, the thickness of the structure increase will increase the weight of the structure, but at the same time energy shortage and environmental pollution, noise pollution and so on have become contradiction growing, traditional methods cannot meet the needs of the development of modern automobile industry.
From the point of view of acoustic systems, structural noise from the structure vibration, sound waves must use and the structure of the adjacent medium, so the analysis of the structure noise root lies in the analysis of the structure and medium influence each other in the acoustic wave propagation is sound - solid coupling vibration characteristics. By studying the coupling system of sound pressure distribution optimization structure to realize lightweight structure.
This topic to a minicar output based on the original data to optimize design of the rear axle bridge shell, this type bridge shell for steel plate welding bridge shell. Through professional CAD 3D modeling software UG accurate modeling of the rear axle and learn from mechanical structure optimization theory and finite element method, the CAD technology, CAE technology into the rear axle housing and internal media bridge cavity acoustic - solid coupling systems and lightweight axle housing study. First analysis of the designed bridge shell in four kinds of typical working conditions of stress and strain of intrinsic mode and free condition. Secondly through the simulation analysis of gas inside the shell and the coupled vibration of bridge shell ontology, to study the acoustic - solid coupling system under different external harmonic excitation
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自控第一二章习题
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课后答案3电路分析基础【史】
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