历史查询   



 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。 
A new device to damp mechanical waves in modular truss beams has been proposed in [1].


Damping of bending waves in truss beams by electrical transmission lines with PZT actuators


Continuum modelling of piezoelectromechanical truss beams: an application to vibration damping


This is because the tuning was obtained only from the truss beams, rather than the fingers, as designed.




 In this paper a space analysis method for builtup system of arch trussed beam has been proposed. The physical model of continuum body is adopted. The structure is resolved into several compound elements and every compound element consist of three parts: arch, trussed beam and lateral brace. In the paper authors'll derive element stiffness matrix, mass matrix and formulas for computation of inner forces. Finally we'll compare the results of computation with that of experimentation and with the precise... In this paper a space analysis method for builtup system of arch trussed beam has been proposed. The physical model of continuum body is adopted. The structure is resolved into several compound elements and every compound element consist of three parts: arch, trussed beam and lateral brace. In the paper authors'll derive element stiffness matrix, mass matrix and formulas for computation of inner forces. Finally we'll compare the results of computation with that of experimentation and with the precise from calculation by customary finite element method in the elementary theory of space member structures.  针对拱桁梁组合体系桥梁,本文提出一种空间计算方法。方法的物理模型采用连续体,并用有限元求解。整个结构划分为若干组合单元,每个组合单元包括拱、桁梁及竖杆横撑架三部分。本文将演引组合单元刚度矩阵、质量矩阵及内力计算公式。最后与试验结果作了比较,并用精确的空间杆系有限元计算作了验证。  In this paper a finite element method for the analysis of the lateral buckling of the archtrussed beam system has been proposed. The structure is divided into arch and beam elements except the panels at the inclined portal where substructure elements are used. A computer program was developed to calculate the safety factor of buckling. The method was verified by a model test. As an application, the critical load of lateral buckling of a bridge under construction across the Yang tze River has been... In this paper a finite element method for the analysis of the lateral buckling of the archtrussed beam system has been proposed. The structure is divided into arch and beam elements except the panels at the inclined portal where substructure elements are used. A computer program was developed to calculate the safety factor of buckling. The method was verified by a model test. As an application, the critical load of lateral buckling of a bridge under construction across the Yang tze River has been computed.  本文提出了拱——桁梁组合体系桥梁的侧倾稳定分析方法.整个结构除拱门架部分划分为子结构单元外,其它均划分为连续体组合单元.作者演引了几何刚度矩阵及子结构单元与连续体单元间的变换矩阵。并编制了程序,对正在建造的一座长江大桥进行了稳定计算.计算结果表明结构有足够的侧倾安全度.此外,对该桥型做了侧倾稳定模型实验,试验结果证明本方法有良好的精确度.  In this paper, an inclined portal panel is regarded as a dynamical substructure so that the finite beam segment element method can be applied to truss bridges with inclined portals. The generalized stiffness matrix and mass matrix of the substructure in terms of mode parameters are formulated by linear transforms through a mode matrix [φ] of nonfullrank and the interior truss beam segment is treated by generalized beam elements. Finally, according to the geometric relationship between... In this paper, an inclined portal panel is regarded as a dynamical substructure so that the finite beam segment element method can be applied to truss bridges with inclined portals. The generalized stiffness matrix and mass matrix of the substructure in terms of mode parameters are formulated by linear transforms through a mode matrix [φ] of nonfullrank and the interior truss beam segment is treated by generalized beam elements. Finally, according to the geometric relationship between the substructure and the adjacent beam segment, the elements are cooperated with the substructures to obtain the F for analyzing the torsion and bending vibration of truss bridges with inclined portals. Besides, a numerical example is given and the obtained results are compared with the results obtained by SAP5 program. The comparison shows that the presented method is of good accuracy.  本文将梯形桁梁桥的斜桥门架节间作为动态子结构,计算组成其非满秩的模态矩阵[Φ],然后通过线性变换得到该子结构相应于模态坐标的刚度阵和质量阵;对于中间桁梁段则用桁梁梁段单元进行处理。最后,通过斜桥门架子结构与相邻桁梁梁段单元相接界面上的几何关系,将斜桥门架动态子结构与桁梁梁段单元相结合,即得到梯形桁梁桥挠曲扭转振动分析的子结构与梁段单元相结合的有限元方法。文中给出了算例,并将结果与SAP5的结果进行了比较。结果表明,该方法具有很好的精度。   << 更多相关文摘 
相关查询  



