n.分叉；分岐；分岐點
The primary resonance bifurcation problems are discussed for an arch structure with parametric and forced excitation. 摘要研究拱型結(jié)構(gòu)在參數(shù)激勵與強迫激勵聯(lián)合作用下的主共振情形的分叉問題。
