NUMERICAL ANALYSIS ON NAVAL APLICATION M7-T36 GEAR BASED ON COMMERCIAL SOFTWARE

Transcription

1 NUMERICAL ANALYSIS ON NAVAL APLICATION M7-T36 GEAR BASED ON COMMERCIAL SOFTWARE Șef lucr. dr. ing. Ionuț Cristian SCURTU, Șef lucr. dr. ing. Adrian POPA Acadeia Navală Mircea cel Bătrân, Constanța, Roânia REZUMAT. Experienţa arată că există ai ulte frecvenţe de operare la bordul navelor și unele eleente pot fi deteriorate de situaţiile de funcţionare proaste. Datorită coplexităţii geoetrice a roţii dinţate, analiza cu eleent finit este necesară pentru a deterina toate frecvenţele proprii pentru roata dinţată prezentată. Lucrarea prezintă o analiză odală pentru roata dinţată M7-T36, pe baza rezultatelor software Ansys. Ochiurile 3D într-o astfel de analiză poate fi coplexă și consuatoare, în scopul de a obţine cel ai bun rezultat din analiza odal. Discretizarea prezentată în acest articol poate fi îbunătăţită pentru odel în siulările ANSYS. Cuvinte cheie: Roata dinţată M7-T36, odal, Analiză navală, soft Ansys. ABSTRACT. Experience indicates that there are any operating frequencies onboard vessels and gears can be daaged by bad operating situations. Due to geoetrical coplexity of gears, finite eleent analysis is needed in order to deterine all frequencies related to presented gear. The paper presents odal analysis for M7-T36 gear based on Ansys software results. The 3D esh in such analysis can be coplex and tie consuing in order to get the best result in odal analysis. The esh presented in this article can be iproved for a odel in ANSYS siulations. Keywords: M7-T36 gear, odal, Analysis on naval aplication, Ansys software. 1. INTRODUCTION Gears are relatively coon in the naval industry and a finite eleent analysis done for specific gear types is relevant to detection of faults discovered during inspections onboard. analysis is coplete, the user can odify input the data used in paraetric design. Ansys software is widely used in industry and anufacturing process via geoetry odeler and static and dynaic load calculation while other sources cause failure during operation. In naval sector, there are any old vessels fitted with wide range of gears. To avoid gears failure production plants have to investigate all related failure sources. 3. ANALYSIS SETTINGS AND NUMERICAL SOLUTION Fig. 1. M7-T36 gear Cad geoetry. 2. PROBLEM DESCRIPTION Settings used in esh will presented below for the nueric solution calculated for M7-T36 gear Cad geoetry. All calculated and presented data is solved in the etric syste as presented in table 1. Table 1. Units The ain idea of Ansys nuerical analysis is to deterine odal frequencies generated for M7-T36 gear. ANSYS Modal can use paraetric design language (APDL) coands necessary to build variable geoetry and eshes. When the report of Unit Syste Angle Rotational Velocity Teperature Metric (, kg, N, s, V, A) Degrees rad/s Celsius Degrees rad/s Celsius Buletinul AGIR, Suplient 3/

2 INOVAREA ȘI CREATIVITATEA ÎN SOCIETATEA CUNOAȘTERII Table 2. Geoetry Geoetry Type DesignModeler Length Unit Meters Eleent Control Display Style Body Color Bounding Box Length X 9.1e-002 Length Y Length Z Properties Volue e-003 ³ Mass kg Scale Factor Value 1. Bodies 1 Active Bodies 1 Basic Geoetry Options Paraeters Paraeter Key DS Attributes Naed Selections Material Properties Advanced Geoetry Options Use Associativity Coordinate Systes Reader Mode Saves Updated File Use Instances Sart CAD Update Copare Parts On Update Attach File Via Tep File Analysis Type 3-D Decopose Disjoint Geoetry Enclosure and Syetry Processing Table 3. Geoetry parts M7-T36 Gear Meshed Graphics Properties Visible Transparency 1 Suppressed Stiffness Behavior Flexible Coordinate Syste Default Coordinate Syste Reference Teperature By Environent Behavior Material Assignent Structural Steel nlinear Effects Theral Strain Effects Bounding Box Length X 9.1e-002 Length Y Length Z Table 3 (continued) Properties Volue e-003 ³ Mass kg Centroid X e-003 Centroid Y e-005 Centroid Z e-008 Moent of Inertia Ip kg ² Moent of Inertia Ip e-002 kg ² Moent of Inertia Ip e-002 kg ² Table 4. Coordinate Systes Type Cartesian Coordinate Syste ID 0. Origin Origin X Origin Y Origin Z Directional Vectors X Axis Data [ ] Y Axis Data [ ] Z Axis Data [ ] Table 5. Mesh Mesh Display Display Style Body Color Defaults Physics Preference Mechanical Relevance 100 Shape Checking Standard Mechanical Eleent Midside des Sizing Size Function Adaptive Relevance Center Coarse Eleent Size Default Initial Size Seed Active Assebly Soothing Mediu Transition Fast Span Angle Center Coarse Autoatic Mesh Based Defeaturing On Defeaturing Tolerance Default Miniu Edge Length e-004 Inflation Use Autoatic Inflation Inflation Option Sooth Transition Transition Ratio Maxiu Layers 5 Growth Rate 1.2 Inflation Algorith Pre View Advanced Options 82 Buletinul AGIR, Suplient 3/2016

3 Table 5 (continued) Advanced Nuber of CPUs for Parallel Part Meshing Progra Controlled Straight Sided Eleents Nuber of Retries Default (4) Extra Retries For Assebly Rigid Body Behavior Diensionally Reduced Mesh Morphing Enabled Triangle Surface Mesher Topology Checking Pinch Tolerance Please Define Generate Pinch on Refresh Table 6. Analysis Modal (A5) Physics Type Structural Analysis Type Modal Solver Target Mechanical APDL Fig. 2. M7-T36 gear Cad esh. Table 9. Modal solution Solution (A6) Adaptive Mesh Refineent Max Refineent Loops 1. Refineent Depth 2. Inforation Status Done MAPDL Elapsed Tie MAPDL Meory Used MAPDL Result File Size Post Processing Calculate Bea Section Results Table 7. Condition Pre-Stress () Pre-Stress Environent Table 8. Analysis Settings Analysis Settings Options Max Modes to Find 20 Liit Search to Range Solver Controls Solver Type Output Controls Stress Strain dal Forces Calculate Reactions General Miscellaneous Analysis Data Manageent Scratch Solver Files Directory Save MAPDL db Delete Unneeded Files Solver Units Active Syste Solver Unit Syste ks Fig. 3. M7-T36 gear total deforation at 1593 Hz. Fig. 4. M7-T36 gear total deforation at 3224 Hz. Fig. 5. M7-T36 gear total deforation at 3567 Hz. 4. RESULTS Presented results for esh(fig.2) and for total deforation (fig.3-10) are also supported with data tables and coands history. The results are presented for M7-T36 gear and can be easily updated for any other gear. Fig. 6. M7-T36 gear total deforation at 3567 Hz. Buletinul AGIR, Suplient 3/

4 INOVAREA ȘI CREATIVITATEA ÎN SOCIETATEA CUNOAȘTERII Table 11. Solution Inforation Fig. 7. M7-T36 gear total deforation at 5663 Hz. Fig. 8. M7-T36 gear total deforation at 5736 Hz. Solution Inforation Solution Inforation Solution Output Solver Output Newton-Raphson Residuals 0 Identify Eleent Violations 0 Update Interval 2.5 s Display Points All FE Connection Visibility Activate Visibility Display All FE Connectors Draw Connections Attached To All des Line Color Connection Type Visible on Results Line Thickness Single Display Type Lines Fig. 9. M7-T36 gear total deforation at 6026 Hz. Fig. 10. Modal frequency solutions. Table 12. Modal Solution Results Fig. 10. M7-T36 gear total deforation at 6693 Hz. Table 10. Modal Solution Mode Frequency [Hz] e e e Miniu Maxiu e Table 13 Model Modal Solution Results Frequency Hz Hz Hz Hz Hz CONCLUSION Using ANSYS odal analysis and different naval parts or structures, it was possible to deterine own frequencies. Cad tests were perfored for the presented gear, and the results showed good agreeent between the nueric and expected solutions, indicating that the esh and input data were correct. 5 REFERENCES [1] Chioibas A. 1, The softer cosos using in drawing process siulation, Mircea cel Batran Naval Acadey Scientific Bulletin, Volue XVII 2014 Issue 2 [2] Oanta E., Panait C., Lazaroiu G, Dascalescu, A., "Analytic Model of the Mobile Half-Bridge of a Circular 84 Buletinul AGIR, Suplient 3/2016

5 Settling Tank", Proceedings of the 11th WSEAS International Conference on Environent, Ecosystes and Developent (EED '13), Brasov, Roania, June 1-3, 2013, ISSN , ISBN , pg [3] Velcea D.-D., Radu I., Calianescu I., Stress fatigue life optiization of an airplane landing gear lever ar using ANSYS ncode, Constanta Maritie University Annals Year XVI, Vol.24 [4] Velcea D.-D., Radu I., Calianescu I., Daage analysis of a gear box shaft under upset working conditions using ANSYS ncode, Constanta Maritie University Annals Year XVI, Vol.24 [5] CAD odel available at Șef lucr. dr. ing. Ionuț Cristian SCURTU Acadeia Navală Mircea cel Bătrân Constanța Despre autori Absolvent al Acadeiei Navale Mircea cel Bătrân, prooția 2010, doctor inginer din anul În prezent, şeful biroului tehnico-adinistrativ cercetare științifică al Acadeiei Navale Mircea cel Bătrân și cadru didactic asociat. Doenii de copetență: Analiza CFD software Ansys, Analiză software structuri ecanice, dinaica structurilor plutitoare, construcția navelor. Șef lucr. dr. ing. Adrian POPA Acadeia Navală Mircea cel Bătrân Constanța Absolvent al Acadeiei Navale Mircea cel Bătrân, locțiitor al coandantului (prorector) pentru forarea continuă în cadrul Acadeiei Navale Mircea cel Bătrân și cadru didactic asociat. Doenii de copetență: Analiza software Ansys, Analiză software structuri ecanice, dinaica structurilor plutitoare. Buletinul AGIR, Suplient 3/