简介:目前,绝大多数道口改造后成为下穿铁路框构桥,由于没有一套完善、科学、节能、高效的排水控制装置,每逢雨季,立交桥下积水问题较为突出,严重影响行人车辆的正常通行。本文介绍了采用排水控制技术进行框构桥积水抽排作业,有效地解决了下穿铁路框构桥积水作业难题。
简介:Thescaleeffectleadstolargediscrepanciesbetweenthewakefieldsofmodel-scaleandactualships,andcausesdifferencesincavitationperformanceandexcitingforcestestsinpredictingtheperformanceofactualships.Therefore,whentestdatafromshipmodelsaredirectlyappliedtopredicttheperformanceofactualships,testresultsmustbesubjectedtoempiricalcorrections.Thisstudyproposesamethodforthereversedesignofthehullmodel.Comparedtoageometricallysimilarhullmodel,thewakefieldgeneratedbythemodifiedmodelisclosertothatofanactualship.Anon-geometricallysimilarmodelofaKoreanResearchInstituteofShipandOceanEngineering(KRISO)’scontainership(KCS)wasdesigned.Numericalsimulationswereperformedusingthismodel,anditsresultswerecomparedwithfull-scalecalculationresults.Thedeformationmethodofgettingthewakefieldoffull-scaleshipsbythenon-geometricallysimilarmodelisappliedtotheKCSsuccessfully.