共查询到19条相似文献,搜索用时 106 毫秒
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本文介绍了用单位阶跃函数求解超静定梁问题。算例证明,该方法使用方便,计算过程简单,是求解超静定梁的一种新方法 相似文献
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画单跨静定梁的内力图是建筑力学和工程力学的重点和难点,本文介绍的简便法是运用计算面积的方法来计算控制截面的内力值,从而画出梁的内力图。 相似文献
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王虹玫 《合肥联合大学学报》2008,18(1):81-84
通过对后张法预应力混凝土超静定结构计算次弯矩等效荷载的学习,直接从结构力学力矩分配法出发,求次弯矩影响产生的综合弯矩,力学概念明确,易为学习者领会. 相似文献
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中以作多年的教学经验总结阐述了静定结构位移计算的教学方法和技巧,抓住了结构力学中重点和难点问题的突破口,为解决高职学生学好结构力学课作了有益的尝试。 相似文献
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冯社佐 《五邑大学学报(社会科学版)》1989,(Z1)
本文应用能量原理,证明了利用莫尔(O.Mohr)公式求解超静定结构位移时,由于约束条件不同,在单位状态中,单位荷载是作用于结构的静定基上,还是作用于原超静定结构上,所得的位移结果,有时是一致的;但也有不相同的情况。应予区别。 相似文献
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培养学员快速作静定结构内力图于玲在结构力学中.确定梁和静定刚梁的内力图作法是要求学员熟练掌握的重点内容之一,这是由该内容在结构力学中所处的地位决定的.然而,对学员来说,总觉得这部分内容无非是在理力、材力的基础上,利用脱离体平衡条件求截面的内力,不是新... 相似文献
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黄瑞梅 《Journal of Zhangzhou Technical Institute》2003,5(4):112-113
通过对静定结构内力图作法的学习归纳,总结出快速作内力图的几种方法,以提高作内力图的速度和效率。 相似文献
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建议采用解静不定问题的力学思想导出圆轴扭转剪应力公式,从而加强学科思想的教学。 相似文献
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对于静不定体系,采用以往的分析,计算烦杂,在此本文提出通过广义逆矩阵及奇异分解来实现求解,通过算例表明本文方法简单,准确,易行.可供工程设计参考. 相似文献
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应用位移法求解结构内力时,对结构中含有抗弯刚度相对很大杆、有定向支承杆和内力静定杆进行分析简化处理,抽象出可反映结构主要力学特性的计算模型,可减少未知量个数,便于计算。 相似文献
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Based on the Leaderman constitutive relations in nonlinear viscoelasticity and the linear geometrical assumption, a mathematical model for the bending of nonlinear viscoelastic beams was established in this paper. The Laplace transformation method and the Titchmarsh theorem were used to prove that some relations exist between solutions to bending problems of visco- and elastic beams, which reveals the fugue effect of viscoelastic materials. The high-order Galerkin approximate solution to the quasi-static response of nonlinear viscoelastic beams under a step load was obtained by using the new method suggested in this paper as well as the Mathematica software and the Newton iteration technique. 相似文献
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艾里光束(Airy beam)是近年来备受关注的新型无衍射激光束之一,艾里激光束具有自由加速、无衍射及自愈等奇异特性,并具有重要应用前景。超常介质为人工微结构材料,它使人们具备按需要设计介质参数的能力。基于一维光束传输方程,获得了超常介质中艾里光束复振幅传输解析表达式。数值计算结果表明,超常介质中艾里光束振幅的大小与在正常介质中完全相同,而振幅的虚部和相位正好相反。所得结果为人们操控艾里光束提供支持。 相似文献
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For statically indeterminate structure, the internal force will be changed with the translation of the supports, because the internal force is related to the absolute value of the stiffness EI. When the tension is different with the compression modulus, EI is the function of internal force and is not constant any more that is different from classic mechanics. In the other words, it is a nonlinear problem to calculate the internal force. The expression for neutral axis of the statically indeterminate structure was derived in the paper. The iterative program for nonlinear internal force was compiled. One case study was presented to illustrate the difference between the results using the different modulus theory and the single modulus theory as in classical mechanics. Finally, some reasonable suggestions were made for the different modulus structures. 相似文献
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For statically indeterminate structure, the internal force will be changed with the translation of the supports, because the internal force is related to the absolute value of the stiffness EI. When the tension is different with the compression modulus, EI is the function of internal force and is not constant any more that is different from classic mechanics. In the other words, it is a nonlinear problem to calculate the internal force. The expression for neutral axis of the statically indeterminate structure was derived in the paper. The iterative program for nonlinear internal force was compiled. One case study was presented to illustrate the difference between the results using the different modulus theory and the single modulus theory as in classical mechanics. Finally, some reasonable suggestions were made for the different modulus structures. 相似文献
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二层刚架结构模型在力学教学实验中的应用 总被引:1,自引:0,他引:1
为了深化基础力学实验教学的改革,该文应用力法求解超静定结构的应力分布,并与工程实际结合,设计开发了二层刚架工程结构模型试验装置,为本科生开设了“工程结构电测应力分析”实验。通过对刚架单根柱的实验测试和理论计算求得的应力分布,一方面使学生由单个受力构件的应力分布可推测二层刚架整体结构的应力分布概况,验证了该教学实验的综合性和创新性;另一方面通过实验偏差的分析,使学生认识到实际工程结构与理论模型之间的偏差是客观事实,从而确立实验在工程实际中是必不可少的思想意识。 相似文献
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周平 《南通职业大学学报》1999,13(2):56-58
超静定结构的连续梁,其中某些截面的破坏未必引起整个梁的破坏。因此要考虑各构件的组合破坏机构,结构可能破坏的机构数很多,要分清主次破坏机构。寻找主要机构的方法很多,用JC法对可能破坏机构进行计算,JC法收敛快,计算时间较少,实践证明采用这种方法是可行的。 相似文献