modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating...

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hb.se Jean-Claude Luneno, PhD Dynamics of Rotating Machines Modeling the torsional dynamics of reciprocating machines: “Pitfalls and Challenges” ÅF-Sound & Vibrations

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Page 1: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Jean-Claude Luneno, PhDDynamics of Rotating Machines

Modeling the torsional dynamics of reciprocating machines: “Pitfalls and Challenges”

ÅF-Sound & Vibrations

Page 2: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

MITT I CENTRALA BORÅSCitycampus - plats för möten

Page 3: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CRANK SHAFTS

Page 4: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

TORSIONAL ANALYSIS: Modeling

Lumped-parameters model:Moment of inertia per cylinder lineincludes contributions fromreciprocating and rotating parts at thecorresponding cylinder position.

Rotating parts: Crank pin, crank web,balance weight, connecting rod (lowerpart)

Recip parts: Piston, connecting rod(higher part)

Handbooks provide expressions to evaluatethese concentrated moments of inertia for well-defined crankshaft geometries

Page 5: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Crankthrow equivalent stiffness (Ke):Observe that the crankpin is twisted while thecrankweb is bended (Analytical method)

Page 6: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Inclusion of journal inertia and stiffness (FE modeling)

Page 7: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Hybrid model: Lumped and descretized system“Case Example modelled in DyRoBeS”

Page 8: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Page 9: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Page 10: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Page 11: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Typical reported Data for torsion analysis

Page 12: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CASE1: GIVEN ”JP 4 CYLINDERS”

Page 13: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

Reported results

Page 14: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CASE1: GIVEN ”JP 4 CYLINDERS”

Page 15: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CASE1: GIVEN ”JP 4 CYLINDERS”

Page 16: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CASE1: GIVEN ”JP 4 CYLINDERS”

Page 17: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CASE2: GIVEN ”RECIP MASS”

Page 18: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CASE2: GIVEN ”RECIP MASS”

Page 19: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CASE2: GIVEN ”RECIP MASS”

Page 20: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

CASE2: GIVEN ”RECIP MASS”

Page 21: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

HB has started partnership with AVL (Excite & Fire)

Page 22: Modeling the torsional dynamics of reciprocating … the torsional dynamics of reciprocating machines: “Pitfalls and Challenges ... HB has started partnership with AVL (Excite &

hb.se

AVL excite + Ansys/Abaqus: Stress analysis

Internal Flow and Valve Dynamics in a Reciprocating Compressor

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Torsional Dynamics: Large 2-pole and 4-pole Steam Turbine

Research Areas Experiments, diagnostic development and phenomenological modeling of the fluid dynamics and thermodynamics associated with reciprocating

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GER-4724 - Torsional Dynamics: Large 2-pole and 4-pole ... · PDF fileThis paper will discuss torsional vibration as it refers to large 2-pole and 4-pole steam turbine powertrains

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balancing of reciprocating machines balance.pdf · TUTORIAL – BALANCING OF RECIPROCATING MACHINERY ... Dynamics of Mechanical Systems. On completion of this tutorial you should

Conformational dynamics and strain · Conformational dynamics and strain Johannes Wislicenus 1835-1902 "specially directed forces, the afﬁnity-energies” are responsible for torsional

PRACTICAL IMPLEMENTATION OF TORSIONAL ANALYSIS · PRACTICAL IMPLEMENTATION OF TORSIONAL ANALYSIS Malcolm E. Leader, P.E. Applied Machinery Dynamics Co. P.O. BOX 157 Dickinson, TX

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Lateral and Torsional Rotordynamics for Centrifugal and ... · Course Overview SwRI's introductory two-day short course covers lateral and torsional rotordynamics, blade dynamics,

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DNVGL-RU-SHIP-Pt4Ch3 Rotating machinery - drivers · 7.1 Torsional and axial vibration ... "Reciprocating internal combustion engine"in this section is referred to as "engine".