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《中国工程科学》 >> 2013年 第15卷 第1期

复杂机械结构中高频动响应能量有限元方法研究

西安交通大学机械工程学院,西安 710049

资助项目 :国家自然科学基金面上项目(11172222);“教育部长江学者与创新团队发展计划”项目(IRT1172) 收稿日期: 2012-08-31 发布日期: 2013-01-14 15:42:09.000

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摘要

从理论研究和应用研究两个方面追踪了国内外关于能量有限元的发展现状,并指出能量有限元已趋向于预示越来越复杂的结构动响应;接下来介绍本课题组近年来利用能量有限元方法针对实际复杂结构及复杂载荷环境中的高频动响应问题所做的研究工作,主要包括3个部分:一是在考虑多种传递波功率流耦合的情况下,发展了圆柱壳、截锥壳等复杂结构的高频响应能量有限元方法,从而得到了此类结构的中高频局部动响应特性;二是考虑在脉动载荷、混响室等复杂环境中,利用能量有限元方法并结合能量边界元方法预示了结构的高频振动特性和声振耦合特性;三是开发了能量有限元的计算软件,为其大规模应用奠定了基础。最后指出了能量有限元方法目前存在的问题和进一步研究的方向。

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