复杂地貌下海底犁式挖沟机动力学仿真分析-论文.pdf

《复杂地貌下海底犁式挖沟机动力学仿真分析-论文.pdf》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、第41卷第9期垡中科技大学学报(自然科学版)VoL41NO．92013年9月J．HuazhongUniv．ofSci．&Tech．(NaturalScienceEdition)Sep．2013复杂地貌下海底犁式挖沟机动力学仿真分析宫含洋王立权邢晓冬(哈尔滨工程大学机电工程学院，黑龙江哈尔滨150001)摘要为分析水下复杂地貌下海底犁式挖沟机动力性能，采用光滑粒子流体动力学法(SPH)和欧拉一拉格朗日耦合法(CEI)建立犁体、海底土壤及流场三者的相互作用仿真模型．通过实验数据及经验公式验证了仿真模型求解的可靠性，并仿

2、真分析了复杂海底地貌及海底冲击载荷对犁体牵引力的影响．仿真结果表明：在余弦波地貌上坡运行的牵引力迅速增加，达到预定沟深时斜坡地貌的牵引力比水平海底的牵引力增加近71．4％，冲击载荷30kN与冲击载荷10kN相比，牵引力增加平均值为24．76．在不同流速方向及水深的流场情况下分析了挖沟机运行对流场应力的影响．随着挖沟机的运行，在挖沟机前端会产生局部流场应力集中．随着流场深度的增加，牵引力会随之增加．关键词动力学分析；数值仿真；海底犁式挖沟机；水下复杂地貌；光滑粒子流体动力学；欧拉一拉格朗日耦合法中图分类号P754文献

3、标志码A文章编号1671—4512(2013)09—0lO2一o5DynamicsimulationanalysisofsubmarinetrenchingplowinunderwatercomplexseabedtopographyGongHanyangWangLiquanXingXiaodong(CollegeofMechanicalandElectricalEngineering，HarbinEngineeringUniversity，Harbinl50001，China)AbstractToanalyzed

4、ynamicperformanceofsubmarinetrenchingplowinunderwatercomplexsea—bedtopography，smoothedparticlehydrodynamics(SPH)andcoupledEulerian—Lagrangian(CEL)analyzeswereadoptedinestablishingthree—phaseinteractionsimulationmodelofworkingconditionincludingsubmarinetrenchin

5、gplow，submarinesoilandflowfield．ExperimentaldataandempiricalformulainreferencepaperverifiedthesolvingreliabilityofthismodelinAbaqus／Explicit．Severalworkingconditionsweresimulatedbasedonthismode1．Itsimulatedthedraftforceofasubmarinetrenchingplowinthecomplexseab

6、edtopography，suchasthecosinewaveformseabedandslopedsea—bedandwiththeimpactloadduringworkingprocess．Resultsshowthatdraftforceincreasesrapidlywhenplowmovesupslopeofcosinewaveformseabed．Inaslopedseabedcondition，thedraftforceisabout71．4morethantheflatconditiononth

7、erequireddepth．Theaveragerateofincreaseofdraftforcefor30kNimpactloadcomparedwiththatof10kNisobservedtobe24．76．Theimpactsofplowontheflowfieldindifferentflowrates，directionandwaterdepthconditionwerealsodiscussedrespectively．Itisconcludedthatflowfieldstressconcen

8、trationproducedlocallyisformedinfrontoftheplowandflowresistanceisgeneratedduringthewholeprocess．Andthedeeperthewaterdepth，thehigherthedraftforceis．Keywordsdynamicanalysis；numerical