combination n. 1.结合,合并,混合,联合,配合,组合。 2.合作;共谋,同谋;同党。 3.〔pl.〕〔英国〕连裤衬衣。 4.【化学】化合(物);【矿物】聚形;〔pl.〕【数学】组合;【语法】组合词。 5.附有旁座的摩托车。 6.暗码锁(的暗码)。 a crystal combination合晶。 a missile-cruiser combination配备有导弹的巡洋舰。 in combination with 和…共同[结合、协同、协力、共谋]。
Introduced by prestressed pier in the gate of spillway in xiao xia hydroelectric power station, the text reasonably established 3-d finite elements mechanic model by the advanced finite elements popular in the world which can expediently impose tension of anchor funicular at its place . it also considered possible diversified combination of loading, and indicated that the effect of its prestressed action is fruitful compared with its conventional counterpart by study of mechanic calculation in comparison . as a result, it vastly improved burdening state of pier . by analysis of 3-d finite element method, it also gained the stress result indifferent boundary conditions such as breast wall joint support and fixed support, and the displacement result in diversified loading combination . those results gained the instructive and reference value in design of prestressed pier 本文结合黄河小峡水电站泄洪闸预应力闸墩这一工程实践,采用国际上已成熟的有限元方法,合理地建立了预应力闸墩的三维有限元模型,该模型可方便地按预应力锚索的点位施加锚索预张拉力,考虑了可能发生的多种荷载工况组合,并与无预应力闸墩结构进行了对比分析研究,指出其预应力效果是明显的,可以大大改善闸墩结构的受力状态,通过三维有限元分析,还得到了胸墙简支、固端不同情况下的应力成果和各荷载下的位移成果,这些成果的取得对预应力闸墩的设计具有一定的指导和参考价值。
Structural internal forces and deformation caused by seismic load are bigger than that caused by automotive load . seismic load controls the designing of large span and small " width-to-span " ratio of large span cfst arch bridge . the seismic resistance is bigger than that with considering combination of various directions, so seismic load combination of various directions should been taken into account during design of large span cfst arch bridge 地震荷载所引起的内力和变形均大于车辆荷载引起的内力变形,对大跨、宽跨比小的钢管混凝土拱桥来说,应以地震荷载控制内力和变形设计,考虑多方向地震荷载的组合后,所得的地震力更大,说明在计算地震力时,应该考虑多方向地震荷载的组合。
The effect of load on the crack is discussed using numerical simulation approach . then, the data mining approach to the unfavorable load combination of the crack is proposed using artificial neural network . the rule of the unfavorable load combination of the crack is generated and three dimensional load combination is given (2)概要阐述了温度场的仿真,研究了薄层单元和分布裂缝模型,应用数值仿真分析方法,结合工程实际,分析了荷载对裂缝的作用效应;在对人工神经网络方法与数据挖掘关系深入研究的基础上,提出了基于神经网络的裂缝不利荷载组合挖掘方法,提取裂缝的不利荷载组合,并研制了三维荷载组合曲面图。
The effect of load on the crack is discussed using numerical simulation approach . then, the data mining approach to the unfavorable load combination of the crack is proposed using artificial neural network . the rule of the unfavorable load combination of the crack is generated and three dimensional load combination is given (2)概要阐述了温度场的仿真,研究了薄层单元和分布裂缝模型,应用数值仿真分析方法,结合工程实际,分析了荷载对裂缝的作用效应;在对人工神经网络方法与数据挖掘关系深入研究的基础上,提出了基于神经网络的裂缝不利荷载组合挖掘方法,提取裂缝的不利荷载组合,并研制了三维荷载组合曲面图。
The effect of load on the crack is discussed using numerical simulation approach . then, the data mining approach to the unfavorable load combination of the crack is proposed using artificial neural network . the rule of the unfavorable load combination of the crack is generated and three dimensional load combination is given (2)概要阐述了温度场的仿真,研究了薄层单元和分布裂缝模型,应用数值仿真分析方法,结合工程实际,分析了荷载对裂缝的作用效应;在对人工神经网络方法与数据挖掘关系深入研究的基础上,提出了基于神经网络的裂缝不利荷载组合挖掘方法,提取裂缝的不利荷载组合,并研制了三维荷载组合曲面图。
But at present, the static performances of the double reticulated domes applied on the different load combination of wind load, snow load, live load, seismic load and dead load are not adequately studied . also the study on the dynamical response under seismic action is not sufficient 但目前对于这类空间结构在雪载荷、风载荷、恒载荷、活载荷、地震载荷等各种载荷共同作用和各种载荷分布方式下的静力性能研究还不充分,特别是对其在地震作用下的动态响应的研究还不足。
In this thesis, the internal force and transfiguration of the double reticulated dome under different load combination are studied; the linear and nonlinear analysis are separately performed; compare the difference between space girder element and space truss element; at last analyze the dynamical response under seismic action . the horizontal seismic response of double layer oblate lattice shell is analyzed by using step-by-step integration procedure . the effect of some parameters such as exterior load, different support conditions and damping ratio on the dynamic internal forces and dynamic properties is studied 本文旨在研究双层球状网壳结构在各种载荷组合下的内力和变形,分别进行了线性和非线性静力分析;进行了空间梁单元和空间杆单元两种计算模型的比较;最后进行了在地震荷载作用下的动力反应分析,动力分析中用子空间迭代法得出了这类空间结构的动力特性,用时程法中的振型叠加法分析了结构在水平地震作用下的动态响应规律。
The resistance attenuation of each element is considered in the design process, and the statistical parameters of the elements are assumed to be the same as the investigated results of china . in the process of the calculating of the element reliability attenuation in expected service life, several load combination and different load ratio of dead load to live load are considered . in order to ensure that structure reliability in expected service life satisfies the requirement of today ’ s code, a method of choosing the initial reliability index of structure basing on the length of expected service life and the structure resistance attenuation is proposed and the corresponding durability reduction factor is chosen by an optimum algorithm 根据我国现行建筑结构可靠度设计原理,考虑耐久性退化影响因素,设计了抗力统计参数与我国调查结果一致的五种代表性钢筋混凝土构件,考虑多种荷载效应组合以及不同荷载效应比,研究了不同使用期内代表性构件的可靠度变化规律;为保证预期使用期内结构可靠度水平仍可满足现行规范要求,提出了根据预期使用期和抗力衰减幅度确定结构设计可靠度指标的方法,并通过优化的方法确定了预期使用期内的耐久性折减系数,给出了预期使用期结构可靠度设计的实用设计方法。