基于多體動力學的直升機動部件綜合系統(tǒng)動特性分析.pdf

1、南京航空航天大學碩士學位論文基于多體動力學的直升機動部件綜合系統(tǒng)動特性分析姓名：魏來申請學位級別：碩士專業(yè)：航空宇航科學與技術指導教師：王華明201101基于多體動力學的旋翼動特性分析IIABSTRACTHelicopterDynamicComponentComprehensiveSystem(HDCCS)isasystemwhichiscomposedofrotatingcomponentsofhelicopterincludinge

2、ngineturbogearboxesmainrottailrotaccessiesdrivenbytransmissionsystems.ItisimptanttocalculateanalyzeHDCCS’sdynamicacteristicinthedesignofhelicopter.ThispapermakesuseoftheMultibodysoftwaretodividebladeinto2nodes15DOFbeamen

3、gineturbotransmissiontailrotintorigiddisktsionbarspringthenestablishesthedynamicmodelofHDCCSinADAMSanalyzesitsacteristic.Besidesthispaperconductsthebladeloadsexpressionintheflyingfwardstategetsthedynamicresponseoftheblad

4、ethroughdynamicsimulation.Themaintasksofthispaperareasfollows:1.Thebladeisdividedintomanylengthsofbeamswhicharecomposedoffinitebeamelementsthosebeamsareconnectedbyfixedjoint.Thenthispaperestablishesthedynamicmodelofflexi

5、blemultibodyoftherotanalyzesitsacteristic.2.Theloadsexpressiononthebladeisacquiredbycombiningthelinearinflowwithbladeelementtheyinthedlespeedfwardstate.ThentheloadsareaddedintothedynamicmodelinADAMSbyusingfcefunctiontoca

6、lculatethedynamicresponse.3.Indertosimplifythemodelingproceduretheenginetransmissiontailrotsystemaretreatedastheshaftthatonlyhastsionstiffnessplatethatonlyhasmomentofinertia.Toanalyzetheinfluenceofbladelaggingflexiblerot

7、modeliscoupledwithtransmissionsystemtocomputetheacteristicofHDCCSsystem.4.ThispaperestablishesthedynamicmodelofLynx’sHDCCSvalidatesthemethodofmodelingcalculationbycomparingwithexperimentaldatapublishedoverseasfindsoutthe

8、influenceofthemomentofinertiaofthetransmissioncomponentstsionstiffnessofshaftstothelowermodeacteristicofLynx’sHDCCS.Keywd:HelicopterDynamicComponentsComprehensiveSystemdynamicofflexiblemultibodydynamicacteristicdynamicre