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The primary resonance bifurcation problems are discussed for an arch structure with parametric and forced excitation. 摘要研究拱型结构在参数激励与强迫激励联合作用下的主共振情形的分叉问题。
2) through computing instances, the primary resonance bifurcation graph and its bifurcation point position for the modes of all ranks are obtained. 2)通过实例计算，得到了悬索的不同振型的主共振分叉图和主共振分叉点位置。
primary resonance bifurcation 主共振分岔
The results are: 1) by adopting a multiple-dimensioned method, the analytical solution to the primary resonance bifurcation point and its graph for the modes of different ranks are obtained; 1)采用多尺度法，得到了不同振型的主共振分叉图和主共振分叉点的解析解；
The first order approximate solution for the system s primary resonance is obtained by average method,and then it is verified by numerical simulation. 利用平均法研究了单自由度多频激励非线性汽车悬架系统的主共振,得到了一次近似解。
The responses including primary resonance induced by current and the composite resonance under combined wave-current for the marine drilling risers of the Donghai 3 are studied. 以东海勘探3号钻井隔水套管为例，研究了流引起的主共振和波流联合引起的组合共振。
PRIMARY RESONANCE AND BIFURCATION OF THE NONLINEAR INTERACTION SYSTEM OF STRUCTURE-SLIDE FOUNDATION -SOIL 结构-滑移基础-土非线性相互作用体系主共振与分叉
Study on Primary Resonance and Bifurcation of Structure-Foundation Interaction System 结构-地基相互作用系统主共振及分叉研究
Research on primary resonance and bifurcation of soil-nonlinear structure interaction system 地基-非线性结构相互作用体系的主共振与分叉
primary parametric resonance and primary resonance 主参数共振-主共振
primary resonance and parametric resonance 主共振-基本参数共振
Primary resonance and primary parametric resonance 主共振-主参数共振
The disease is still in its primary stage. 这疾病仍然在初发阶段。
The little boy left primary school at eleven. 这个小男孩十一岁时小学毕业。
Sure. We are friends since primary school. 当然，我们从小学就是朋友了。
I started primary school when I was 5 years old. 我五岁时开始读小学。
A primary cause of Tom's failure is his laziness. 懒惰是汤姆失败的主要原因之一。
Primary school teachers use a lot of visual aids. 小学教师使用大量的视觉教具。
Love and hatred are primary emotions. 爱和恨是基本的情感。
The Democratic primary was held this month. 民主党候选人初选於本月举行。

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