Fist of all , on the basis of the research of agone boffins , this author investigates the interaction mechanism of bolts and rock , and introduces the elastic ? lastic analytical resolution which is consist of the liner structure , the equivalent reinforced wall rock and the original wall rock in the simple loading from the equivalent well - proportioned view ; this solution is very important meaning for the engineering design . on the basis of coulomb friction model , the author introduces the finite element equation of the contact problem in order to provide the academic foundation for the application of msc . marc . finally , combining the engineering practice of the non - linear analysis of shield tunnel through yellow river of the south - north water transfer and using the model of friction , the author researched the evolution law of stress and displacement field in the structure of grouted rock bolts , and analyzed the effect to the stress and deformation of surrounding rock mass due to anchor supports 首先,在前人研究成果的基础上,对锚杆与围岩的相互作用机理进行研究,利用全长锚固锚杆的中性点理论,从等效均化的角度来考虑锚杆对围岩的加固作用,并推导了在简单荷载作用下,含有衬砌、等效加固后的围岩、原始围岩三者的弹塑性解析解,对工程设计有着重要的参考意义;在数值模拟方面,以考虑锚固围岩满足规则化库仑摩擦模型为基础,利用虚功原理推导了接触问题的有限元方程的计算格式,为开发运用大型商用有限元软件msc . marc提供了理论根据,也形成了本文的理论基础:最后,论文以南水北调东线穿黄隧洞稳定性分析项目为工程实例,利用本文所述的接触问题的摩擦模型理论,对锚杆支护结构的应力场、位移场的变化规律进行了研究,分析了加锚支护对隧洞围岩应力、变形的影响。
( 2 ) with the universal finite element software ansys , reasonable finite models for such slab - column connection were established and a static non - linear analysis was made , and the rule of this structure about the aspects of force deformation and destruction under vertical load and unbalanced bend are summarized . based on this , a simplified calculation method of punching capacity is advanced 研究空腹板柱节点的传力机理和破坏模式;对在竖向荷载作用下、竖向荷载和不平衡弯矩共同作用下板柱节点内力、变形和破坏过程进行研究,并提出了抗冲切承载力的简化计算方法。
Abstract : based on the principle of mininmum potential and using rayleigh - ritz method , the geometric non - linear analysis of higher bridge piers was solved in this paper . the new concept of equivalent horizontal force proposed by the author may be casily to calculate the second effect , which was produced due to the vertical forces and resisted by the piers and rubber pad bearings incorporately . the simple formula in this paper are applicable to calculate by hand , understood clearly without computation of successive iteration , higher precision and graspable easily for the disigmer therefore it has the practical significance 文摘:根据最小势能原理,用瑞雷-里兹法解决了高桥墩的几何非线性分析问题;其次,提出了等效水平力的新概念,可以方便地解决桥墩和板式橡胶支座联合抵抗垂直力所产生的二次效应问题.笔者提出适合于手算的简便计算公式,概念明确,勿须迭代运算,精度较高,易为设计人员掌握,因此具有实用价值
3 . we do short circuit analysis upon multiple magnetic circuit transformers by use of steady non - linear analysis and get the leakage reactance respectively between high voltage and high voltage 、 high voltage and low voltage 、 two high voltage and low voltage 、 low voltage and high voltage and low voltage and two high voltage . what ’ s more , we do finite element analysis upon the temperature field of transformers and according to its distribution we get the wind speed to forced air cooling 3 、采用稳态非线性分析法对多磁路变压器进行短路阻抗计算,利用能量法计算出变压器高压与高压、高压与低压、两高压与低压、低压与高压以及低压与两高压之间的漏感;对变压器的温度场进行有限元分析,确定温度场分布情况。
2 . a rational finite element model of thin - wall core box cast - in - site concrete hollow floor is established and such floor is made a non - linear analysis in ansys which is an international common software . comparing numerical analysis results and testing results with the ones achieved by the proposed formula , it is found that they are tallied well , so the validation of the above two methods is verified 2 、建立了薄壁箱体现浇混凝土空心楼盖的有限元分析模型,采用ansys有限元软件对其进行了非线形全过程分析,将有限元计算结果、本文公式的计算结果和试验结果进行对比分析,发现三者吻合较好,论证了这两种方法的可行性。