波,流联合作用下的近岸海底沙波稳定性研究进展

近岸海底大型沙波是一种研究较为薄弱的地貌单元，但它的迁移对港口、航道和海底电缆及钻井平台、输油管道等海洋工程设施建设造成的危害极大。在综述目前国内外有关研究文献的基础上，概要地介绍了作者提出的一种较为简便、省力和有效的沙波迁移速率和沙波稳定性定量评价和预测方法，旨在提高航道通航能力和海洋工程建设的灾害防治和预测能力

DEVELOPMENT OF THE SAND WAVES STABILITY ANALYSIS UNDER THE COMBINED INFLUENCE OF WAVES AND CURRENTS

Sedimentary geology of the offshore sand waves has been attracted more attention on the morphological features and internal structures, because the offshore sand waves have been taked for favorable oil and gas reservoir bed. Recently, it′s found that the migration of offshore sand waves has a disastrous impact on the offshore engineering and facilities as the harbor,dock, navigation channel, submarine cable, offshore drilling and pipeline, etc. with the increasing exploitation of the marine resources. Consequently, it′s highly required to evaluate and predict quantitatively, the migration rate of offshore sand waves. Improvement on the migration rate evaluation is approached to the offshore sand waves based on previous studies, which means that the equilibrium range spectrum analysis of sand waves observed is utlized to find the functional relationship between the density function of time spectrum and bed shear stress, migration rate, etc., and then, the theorectical formula to estimate the migration rate of sand waves.