CAJ | 학술논문

气垫船破冰是指采用大吨位气垫船以临界航速在冰面上航行进行破冰，是一种较新的内河破冰方法，可应用于黄河凌汛灾害的防治领域。文章通过对浅水厚冰层条件下气垫船破冰过程的数值模拟，分析了气垫船的破冰机理。在临界航速下，气垫船始终位于船首波峰后方，对所兴起的船波起持续的推波作用，在冰面上逐渐兴起幅值较大的船波。当冰层的中的应力应变积累到破坏极限时，冰层产生破裂。气垫船破冰的临界航速实际上就是船身附近表面波的行进速度，在文中浅水厚冰层环境下，气垫船破冰的临界航速可按波长为3倍船长的表面波行进速度进行估计。
기점선파빙시지채용대둔위기점선이림계항속재빙면상항행진행파빙，시일충교신적내하파빙방법，가응용우황하릉신재해적방치영역。문장통과대천수후빙층조건하기점선파빙과정적수치모의，분석료기점선적파빙궤리。재림계항속하，기점선시종위우선수파봉후방，대소흥기적선파기지속적추파작용，재빙면상축점흥기폭치교대적선파。당빙층적중적응력응변적루도파배겁한시，빙층산생파렬。기점선파빙적림계항속실제상취시선신부근표면파적행진속도，재문중천수후빙층배경하，기점선파빙적림계항속가안파장위3배선장적표면파행진속도진행고계。
Ice sheet can be broken into small slabs with a heavy air cushion vehicle (ACV) traveling on float ice sheet at the critical speed. Ice-breaking with ACV is a new ice-breaking method in In-land Riv-er which has important application in prevention of ice jam flood in the Yellow River. In this paper, the ice-breaking process of ACV is numerical simulated under a shallow water and thick ice sheet condition. According to the simulating results, ACV traveling at the critical speed always chases after and pushes the wave crest ahead of ACV. Thus, the amplitude of the wave around ACV gradually increases due to the continual push of ACV. Ice sheet cracks when the stress and strain in ice sheet accumulated to the critical value of failure. The critical speed of ACV should consist with the velocity of the surface wave around ACV. Under the thick ice sheet and shallow water environment in this paper, the critical speed of ACV is estimated as the velocity of surface wave with a wavelength about triple length of ACV hull.