Academic Journal
Out-of-plane instability and vibrations of a flexible circular arch under a moving load
| العنوان: | Out-of-plane instability and vibrations of a flexible circular arch under a moving load |
|---|---|
| المؤلفون: | Zhao, Xingwei, Van der Heijden, GHM |
| المصدر: | International Journal of Structural Stability and Dynamics (2024) (In press). |
| بيانات النشر: | World Scientific Pub Co Pte Ltd |
| سنة النشر: | 2024 |
| المجموعة: | University College London: UCL Discovery |
| مصطلحات موضوعية: | Circular arch, out-of-plane buckling, large deformation, Cosserat rod, moving load, generalized-α method, delay effect |
| الوصف: | Flexible lightweight arched structures are finding increasing use as components in smart engineering applications. Such structures are prone to various types of instability under moving transverse loads. Here, we study deformation and vibration of a hinged circular arch under a uniformly moving point load using geometrically-exact rod theory to allow for large pre- and post-buckling deformations. We first consider the quasi-statics problem, without inertia. We find that for arches with relatively large opening angle (∼ 160°) a sufficiently large traversing load will induce an out-of-plane flopping instability, instead of the in-plane collapse (snap-through) that dominates failure of arches with smaller opening angle. In a subsequent dynamics study, with full account of inertia, we then explore the effect of the speed of the load on this lateral buckling. We find speed to have a delaying (or even suppressing) effect on the onset of three-dimensional bending–torsional vibrations and instability. Based on numerical computations we propose a power law describing this effect. Our results highlight the role of inertia in the onset of elastic instability. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | text |
| اللغة: | English |
| Relation: | https://discovery.ucl.ac.uk/id/eprint/10189599/1/Out-of-plane-instability-and-vibrations-of-a-flexible-circular-arch-under-a-moving-load.pdf; https://discovery.ucl.ac.uk/id/eprint/10189599/ |
| الاتاحة: | https://discovery.ucl.ac.uk/id/eprint/10189599/1/Out-of-plane-instability-and-vibrations-of-a-flexible-circular-arch-under-a-moving-load.pdf https://discovery.ucl.ac.uk/id/eprint/10189599/ |
| Rights: | open |
| رقم الانضمام: | edsbas.762CA143 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |