توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱EFFECT OF SH WAVES ON ELLIPTICAL CAVITY BY ANALYTICAL APPROACH
نویسنده(ها): ،
اطلاعات انتشار: سال
تعداد صفحات: ۱۱
In this paper, the two–dimensional scattering of plane SH waves by an elliptical cavity (including unlined tunnel) are analyzed. The exact series solution of the problem, for general angle of incidence of the plane SH waves, has been used to examine how the presence of the tunnel amplify the motion.
(a) The nature of ground motion has been found to depend on two key parameters:
(b) The angle of incidence.
(c) The ratio of the tunnel width to the wavelength of incident SH waves.
The ratio of length to width of the tunnel.
For different length to width ratios, different dimensionless frequencies and various incidence angles, amplitude and phase of the surface displacements are given in Figures 2–6.
The maximum displacements amplitude is equal to 4 for the wave propagating with =60. For the bigger values of the tunnel length to width ratio, there are more abrupt jumps in amplitudes and phases.

۲Modeling of accelerated coastal erosion in the vicinity of the Amirabad Port due to newly constructed updrift structures
نویسنده(ها): ، ،
اطلاعات انتشار: هفتمین همایش بین المللی سواحل، بنادر و سازه های دریایی، سال
تعداد صفحات: ۸
This paper describes the coastal shoreline modeling study performed, using a One–line type of model, for the Iranian Ports and Shipping Organization (PSO), to investigate the causes and alternative remedies to counter the increasingly rapid coastal erosion experienced nearby the Amirabad Commercial Port, located by the south–eastern shores of the Caspian Sea. Through this pilot project, it is intended to bolster the application of this kind of models in Iran when planning new coastal and ports structures with the aim of investigating and mitigating the repercussions on adjacent sites. The modeling results demonstrate that the up–drift coastal structures indeed block the littoral drift causing increased erosion down–drift, westwards of the Amirabad Port which was remedied by design of a long–shore coastal protection after modeling various coastal protection scenarios.<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه