非線(xiàn)性彈性地基梁在隨動(dòng)載荷作用下的屈曲和振動(dòng)
發(fā)布時(shí)間:2018-08-26 13:33
【摘要】:基于可伸長(zhǎng)梁的幾何非線(xiàn)性理論,建立了非線(xiàn)性彈性地基上梁在隨動(dòng)載荷作用下的屈曲問(wèn)題和振動(dòng)問(wèn)題控制方程,分別采用打靶法分析了彈性地基梁的后屈曲行為以及后屈曲構(gòu)形上的振動(dòng)問(wèn)題。給出了不同非線(xiàn)性彈性地基系數(shù)下,梁在隨動(dòng)載荷作用下的過(guò)屈曲平衡路徑曲線(xiàn)以及過(guò)屈曲附近前三階頻率隨載荷變化的曲線(xiàn)。研究表明:立方剛度系數(shù)K_2對(duì)梁的屈曲和振動(dòng)影響較小,而線(xiàn)性剛度系數(shù)K_1對(duì)梁的過(guò)屈曲性態(tài)和固有頻率都有影響。
[Abstract]:Based on the geometric nonlinear theory of elongated beams, the governing equations of buckling and vibration of beams on nonlinear elastic foundations under dynamic loads are established. The post-buckling behavior of beams on elastic foundations and the vibration of post-buckling configurations are analyzed by shooting method respectively. The results show that the cubic stiffness coefficient K_2 has little influence on the buckling and vibration of the beam, while the linear stiffness coefficient K_1 has influence on the post-buckling behavior and natural frequency of the beam.
【作者單位】: 蘭州理工大學(xué)理學(xué)院;
【基金】:國(guó)家自然科學(xué)基金(11272278;11262010) 甘肅省自然科學(xué)基金(1212RJZA028)
【分類(lèi)號(hào)】:O342
本文編號(hào):2205015
[Abstract]:Based on the geometric nonlinear theory of elongated beams, the governing equations of buckling and vibration of beams on nonlinear elastic foundations under dynamic loads are established. The post-buckling behavior of beams on elastic foundations and the vibration of post-buckling configurations are analyzed by shooting method respectively. The results show that the cubic stiffness coefficient K_2 has little influence on the buckling and vibration of the beam, while the linear stiffness coefficient K_1 has influence on the post-buckling behavior and natural frequency of the beam.
【作者單位】: 蘭州理工大學(xué)理學(xué)院;
【基金】:國(guó)家自然科學(xué)基金(11272278;11262010) 甘肅省自然科學(xué)基金(1212RJZA028)
【分類(lèi)號(hào)】:O342
【相似文獻(xiàn)】
相關(guān)期刊論文 前3條
1 田千里;考慮剪切反力之彈性地基梁[J];力學(xué)與實(shí)踐;1979年02期
2 袁祥忠,梁政;彈性地基梁的一種解法[J];力學(xué)與實(shí)踐;1984年04期
3 ;[J];;年期
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