排序方式: 共有10条查询结果,搜索用时 15 毫秒
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用Trefftz型边界解法分析了中厚板弯曲问题,发现了一类新的、因Trefftz函数溢机引起的“自锁现象”,并提出了一种消除这类自锁问题的“变量减缩法”。 相似文献
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A composite structure-internal liquid element is proposed in this paper. Through the use of analytical functions in two orthogonal directions, the three-dimensional problem of coupled structure-internal liquid vibration is reduced to a one-dimensional one, resulting in a drastic reduction in computing efforts.Cylindrical and conical frastum composite elements are proposed to suit different problems, and examples are presented to demonstrate the accuracy of the method. 相似文献
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A composite structure-internal liquid element is proposed in this paper.Through theuse of analytical functions in two orthogonal directions.the three-dimensional problem ofcoupled structure-internal liquid vibration is reduced to a one-dimensional one.resulting ina drastic reduction in computing efforts.Cylindrical and conical frustum composite elements are propased to suit differentproblems.and examples are presented to demonstrate the accuracy of the method. 相似文献
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Architectural sandwich panels with thin-walled cold-formed steel facings and rigid foamed insulating core are becoming more and more popular as enclosures for system buildings. In this paper, the structural behavior, including flexural stresses/deflections, flexural wrinkling, axial stability, thermal stresses and vibration, is presented, summarizing more than a decade of research. Methods used are analytical (boundaryvalued approaches), numerical (finite-strip, finite-layer, finite prism approaches) and experimental (full-scale testings). Key equations are formulated, and results by different methods are compared. 相似文献
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Architectural sandwich panels with thin-walled cold-formed steel facings and rigidfoamed insulating core are becoming more and more popular as enclosures for systembuildings. In this paper, the structural behavior, including flexural stresses/deflections,flexural wrinkling, axial stability, thermal stresses and vibration, is presented,summarizing more than a decade of research. Methoda used are analytical (boundary-valued approaches), numerical (finite-strip. finite-layer,finite prism approaches) andexperimental (full-scale testings). Key equations are formulated and results by differentmethods are compared. 相似文献
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结构与介质分析的半解析元法 总被引:9,自引:0,他引:9
结构与介质分析是力学学科中极为主要的一个方面。这一古老学科经近百年来的发展已经成、为各自然科学中在数学上较为完整、严密和系统的一门科学,至今基本理论已相当成熟。但由于数学方法上的困难,许多问题特别是一些高维问题能得到精确解析解的范围还是有限的。但是近二、三十年来计算技术发展,特别是有限元法的提出与应用已使结构与介质分析问题的求解达到一个飞跃。目前只要确立基本方程,原则上任何这方面问题都能用有限元法来加以求解。有限元法之所以得到如此迅速发展和被广泛应用,一方面是其解决问题的能力高,另一方面也在于便于掌握。因为用有限元法解决实际问题,只需有关人员了解问题的基本关系式和共同的计算技术,而不需要一般技术人员难于掌握的比较复杂的应用数学知识。有限元法发展到现在(虽然时间不长),已经渗透到力学及其它自然科学各个领域中。但随着应用的广泛深入,有些问题也越 ... 相似文献
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