車輛與結構之互制振動(3/3)

Abstract

車輛與結構之互制振動是一個複雜的 力學問題，其原因在於此一問題包含了「橋 梁」與「車輛」兩種子結構，而且兩者隨 著時間而相互移動。由於兩者都是彈性 體，因此在相互移動的過程中，會有能量 的相互傳遞，此一現象可以經由兩者間的 「接觸力」之變化觀察出。主持人與研究 群過去曾進行一系列有關車輛移動問題的 研究，不管是理論的解析解，或是數值的 分析，都取得了一定的研究成果，發表在 不同的國際期刊中。在這三年期的研究案 中，吾人主要是就一些過去較少涉及的問 題加以探討，基本上雖仍以原計劃的內容 為主軸，但在研究過程中，仍免不了因問 題之擴大，而稍微調整主題，唯整體而言， 仍屬相符若節，在此一報告中，將僅就兩 項最突出的成果加以簡述。

The interaction dynamics between the bridge and moving vehicles is a complicated problem in that it consists of two subsystems, i.e., the bridge and moving vehicles, and that the two subsystems move with respect to each other. Because the two subsystems are elastic bodies, energies of various forms can be transferred between the two bodies, which can result in variation of the contact forces. In the past decade, the principal investigator and his group have conducted a series of research related to the vehicles moving load problems, including both the analytical and numerical studies. Most of the results have been published in various international journals. In this three-year research project, focus was placed on those subjects not fully covered by previous studies, as outlined in the project proposal. However, it is admitted that in the process of researching, some minor adjustments are unavoidably made on the research items, although the main direction remains basically unchanged. In this report, only two major achievements will be summarized.