ROMANIAN ACADEMY ACADEMY OF TECHNICAL SCIENCES Department of Technical Sciences

COMMISSION OF ACOUSTICS OF ROMANIAN ACADEMY

THE ANNUAL SYMPOSIUM OF THE INSTITUTE OF SOLID MECHANICS SISOM 2007 and

HOMAGIAL SESSION OF THE COMMISSION OF ACOUSTICS

Bucharest, May 29-31, 2007 Home Page Sisom 2000

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Session 2

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Organizing CommitteeSession 4

Organizing Committee: Co-Chairman Acad. Radu VOINEA, Romanian Academy Prof. Radu MUNTEANU Rector Univ. Tehnica Cluj Dr. Tudor SIRETEANU, Institute of Solid Mechanics Vice-chairman Dr. Veturia CHIROIU, Institute of Solid Mechanics Prof. Ioan MAGHETI, Politechnica Univ., Bucharest Members Prof. Charles W. STAMMERS, Univ. of Bath, UK Prof. Pier Paolo DELSANTO, Politecnico. di Torino, Italy Prof. Boris RYBAKIN, Rep. Moldova Academy Prof. Delia DIMITRIU, Univ. of Manchester Prof. Petre P. TEODORESCU, Univ. of Bucharest Prof. Dan IORDACHE, Politechnica Univ., Bucharest Prof. Polidor BRATU, ICECON, Bucharest Prof. Napoleon ANTONESCU, Univ. from Ploieşti Prof. Dumitru STANOMIR, Politechnica Univ., Bucharest Prof. Mircea RADES, Politechnica Univ., Bucharest Prof. Gheorghe AMZA, Politechnica Univ., Bucharest Conf. Mariana STAN, Spiru Haret University Prof. Marius SMIGELSCHI, Inst. of Architecture, Buch. Dr. ing. Ionel IORGA, INCDPM Dr. ing. Dinu BRATOSIN, Institute of Solid Mechanics Dr. ing. Lucian CĂPITANU, Institute of Solid Mechanics Dr. Marcel MIGDALOVICI, Institute of Solid Mechanics Dr. ing. Wladimir RACOVIŢĂ, Institute of Solid Mech. Dr. ing. Luige VLĂDĂREANU, Institute of Solid Mech.

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LIFE AND ACTIVITY OF PROFESSOR AURELIAN STAN Secretary :aCommittee dr. Marcel MIGDALOVICI dr. eng. Cristian RUGINA dr. Margarit BAUBEC

eng. Gabriela VLADEANU as. Veronica IOVANESCU Special thanks to the sponsors: - AGIR - General Association of Romanian Engineers - VTC – SRL (Engineering and Industrial Technologies, Engi neering & Dealer – ABB)

Session 1 – System dynamics and continuum mechanics (1D) Dan Alexandru IORDACHE, Viorica IORDACHE Complexity features in mechanics (2D) Gheorghe MORARU Concentration of stresses near a debonded flexible inclusion in plane elasticity (3D) MIRCEA RADEŞ Trends in experimental structural dynamics (4D) Iuliana OPREA Ginzburg Landau amplitude equations for anisotropic materials (5D) DINU BRATOSIN Non – linear attenuation effects on soils dynamic response evaluation (6D) Tudor SIRETEANU, Nicolae STOIA Vibration amplification in oscillating systems with degrading characteristics

(7D) Dan DUMITRIU, Gaston RAUCHS, Veturia CHIROIU Optimization procedure for parameter identification in inelastic material indentation testing (8D) Polidor BRATU Evaluation of quality dynamic performances in case of vibrating rollers used for road works (9D) Daniel BALDOVIN, Pier Paolo DELSANTO, Ana-Maria MITU, Veturia CHIROIU On the modal strain energy approach

(10D) Ligia MUNTEANU, Pier Paolo DELSANTO, Dan DUMITRIU On the modelling of the Euler-Bernoulli beams with auxetic patchs (11D) Radu D. RUGESCU Proof of the Unstable Behavior of Ultra Long Orbital Tethers (12D) Valerica MOSNEGUTU On the modeling of the human knee joint

(13D) Angela PETRESCU An analytical solution of a problem associated to the deformation of a linear viscoelastic rock around a circular shaft (14D) Horia PAVEN Characteristic frequencies relationships in the rheodynamics of standard linear viscoelastic solid

(15D) Horia PAVEN, Mariana CRISTEA, Bogdan C. SIMIONESCU Multifunctionality selection criteria in the dynamic thermorheological characterization of solid-like polymer materials. I. PMMA in tensile condtions (16D) Grigore Liviu ODOBESCU, Rareş Alexandru ODOBESCU Some aspects about power transfer optimization between electronic generator – piezoelectric transducer in case of low frequency power ultrasounds (17D) Liviu POPA, Diana-Flavia POPA Study of the transitory vibratory movements of a non-circular shaft whit an eccentrically rotor (18D) Ion ION GEORGE CONSTANTINESCU’ torque converter analysis by simulink (19D) Gabriel MURARIU, Luminita MORARU Fields evaluation for a KLEIN –GORDON- MAXWELL -EINSTEIN system equations (20D) Gabriel MURARIU, Marina Aura DARIESCU, Ciprian DARIESCU Discrete symmetries of the field equations in curved space - time

(21D) Ion ION Torque converter with continuously variable transmission

(22D) Marcel MIGDALOVICI, Daniela BARAN On a parametric stability identification method with applications (23D) Adrian I. NICULESCU On self adjustable shock absorbers “VZN” roll behavior, relative to the standard ones (24D) S. OPRISAN, A. BUZAIANU, I. FUIOREA, N. CONSTANTIN, C. BANU, B. SPINEANU, I. R. MARIN Studies on the repair of aeronautical structures using fibre reinforced polymer patches (25D) Annabella GROZESCU Investigation of cavity flow physics

(26D) J. ONISORU, A. IAROVICI, L. CAPITANU FE prediction of femoral stem osseointegration (27D) I. PREDOIU, M. STOIA-DJESKA, F. FRUNZULICA, I. POPESCU, P. SILISTEANU The synthesis of controllers for flutter suppression-theory and experiment

(28D) Ileana TOMA New periodic LEM solutions for the nonlinear pendulum

(29D) Carmen DEBELEAC A physico-mathematic model for the dynamic state movement analysis of the frontal charger (30D) Silviu NASTAC Damping non-linearities influences on the isolation performances of the antivibrational systems (31D) Silviu NASTAC About isolation performances for the polygonal shape elastic isolation devices (POSEID) (32D) Silviu NASTAC A theoretical model for stress and strain analysis on dynamic performances at vibratory systems (33D) Andrea BALDINI, Enrico BERTOCCHI, Matteo GIACOPINI, Stefano MARGINI, Stefano RIVASI, Roberto ROSI, Antonio STROZZI On torsional vibrations in conrod assemblies for high performance engines (34D) Adrian LEOPA

The evaluation effects of vibration, from the technological equipment, on the environment

(35D) Adrian LEOPA

The impact of vibration on the environment, from the forging equipment (36D) Margarit BAUBEC On the uniqueness of solution in an anisotropic Reissner theory for plates Session 1 Home Page Sisom 2007

Session 2 Organizing Committee

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Session 2 – Robotics, mechatronics, biomechanics, wear investigations of materials (1R) Luige VLADAREANU, Ion N. ION, Mihai MUNTEANU MERO modular walking robots control (2R) Lucian Marius VELEA, Luige VLADAREANU, Radu Adrian MUNTEANU, Mihai Stelian MUNTEANU, Zachei PODEA, Alida Lia Mariana VELEA Automatic S.A.M.D. monitoring and common equipment systems (3R) George C. BALAN, Alexandru EPUREANU, Ciprian CUZMIN The monitoring of a lathe using an artificial neural network – 5th part (recordings spectral analysis, use of ann on monitoring of the tool wear) (4R) George C. BALAN, Alexandru EPUREANU, Ciprian CUZMIN The monitoring of a lathe using an artificial neural network – 6th part (statistics, monitoring, fuzzy c-means method) (5R) Ionel STARETU, Marian BOLBOE Sinthesis, analysis, design and functional simulation for a family of anthropomorphic grippers for robots. (6R) Mircea FENCHEA Vibrodiagnosis of the bent shafts in the mechanical transmissions

(7R) Marian BOLBOE, Petre ALEXANDRU 3D CAD-model of the anthropomorphic gripping system with 4 fingers- structural and kinematics analyses. (8R) Alexandru VLADEANU, Gabriela VLADEANU The compaction process control at the earthworks and roadworks (9R) Ion NAE, Marius Gabriel PETRESCU Aspects concerning the optimization of the mechanical working technological process (10R) Marius Gabriel PETRESCU, Ion NAE Optimizing method for the heat stress relaxation regimes of the largest equipments (11R) DORIN BADOIU The analysis and synthesis of a linkage with cinematic parameters imposed (12R) Gheorghe NIŢU, Boris-Sergiu CONONOVICI, Wladimir RACOVITA Mobile robot for experimental study of reactive behaviour (13R) Ion NIŢU, Cornel SECARĂ Kinematic study of a planar redundant manipulator with three degrees of freedom (14R) Doina MARIN A model for electromecanichal feed drives system (15R) Gabriel Arin MIHALCEA, Titus STANESCU Structured surfaces a new challenge for friction couples tribology

(16R) Gabriel Arin MIHALCEA, Octavian GRIGORE Tribological behavior of thrust bearings using structured surfaces. Part 1.Theoretical background. (17R) Gabriel Arin MIHALCEA, Octavian GRIGORE Tribological behavior of thrust bearings using structured surfaces. Part II. Experimental results.

Session 1 Home Page Sisom 2007

Session 2 Organizing Committee

Session 3

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Session 3 – Technical Acoustics

(1A) Delia DIMITRIU Aviation and the environmental noise directive: An analysis of difficulties and gaps in the implementation (2A) Cristian NEGRESCU, Dumitru STANOMIR, Amelia CIOBANU A software tool for spatial localization cues (3A) Diana Ioana POPESCU Industrial noise mapping in Cluj-Napoca (4A) Nicolae CREŢU, Mihail POP Nonlinearity estimation by using the harmonic distortion method of sound waves propagation in a ferromagnetic sample (5A) Vasile BACRIA, Mihai TOADER , Nicolae HERIŞANU Consideration upon the realization of the acoustic confort in the urban environment (6A) George ANDREI, Dan ANDREI Mathematical model for ID simulation of acoustic wave in active media

(7A) Cristina PACHIU, Jean-Louis IZBICKI, Resonances the immersed elastic plates: influences of the physical parameters and analyzes of the Interferences (8A) Ioan Cosma, Diana Popescu, Andrei Cosma Entropy in hearing sense organ and psychophysical law of acoustics (9A) Vasile IGNAT Optimization for underwater acoustic detection system’s antennal arrays in order to obtain the best length / directivity index ratio (10A) Mihaela Picu The acceptability of the noise level in the work environment (11A) Diana Ioana POPESCU Noise Environment along Cluj-Napoca Tramway (12A) Dan-Alexandru IORDACHE, Viorica IORDACHE, Andrei PETRESCU Study of some numerical simulations of the soliton pulses propagation. (13A) Inge GAVAT, Corneliu Octavian DUMITRU, Gabriel COSTACHE, Diana MILITARU Progresses in speech recognition for romanian language (14A) Doru TURCAN, Gabriel KRAFT Graphic interfaces designed for management and decision levels in industrial processes regarding data display of the monitoring parameters of the machines’ condition.

(15A) Dan ANDREI, George ANDREI Preliminary experiments for the resolution of the mathematical model of a piston compressor working with pulsations of pressure. (16A) Mihaela CRETU,Vizitiu GEORGEL, Adina-Cristina TOMA, Silviu Emil IONESCU, Ioana Luminita HOSSU A study to perform acoustic measurements in unreachable zones (17A) Gabriel ANGHELACHE, Danut STANCIOIU An attempt to decrease the noise pollution of urban busses using a new exhaust silencer (18A) Horia DUMITRESCU, Adina-Cristina TOMA The influence of boundary layer turbulence upon the noise radiated by an aerodynamic profile (19A) Vasile BACRIA, Constantin BĂRBULESCU Noise pollution generated by the electrical transforming stations (20A) Viorel BROASCĂ, Nicolae ENESCU The equivalent sources technique to compute the absorbed sound field by a honeycomb sandwich panel (21A) Ionel IORGA, Mihai COSTESCU, Dan NICULESCU, Silviu PLATON Minimum health and safety requirements regarding the exposure of workers to noise (22A) Amalia POPESCU Some considerations on measurement uncertainty in LSP microphones calibration by reciprocity method (23A) Ion STROE Weight functions methods in stability study of vibrations

(24A) Valentin CEAUSU, Mihail BOIANGIU About bending vibrations of the shafts (25A) Ionel IORGA, Mihai COSTESCU, Silviu PLATON, Dan NICULESCU Minimum health and safety requirements regarding the exposure of workers to noise (26A) Mihai COSTESCU, Silviu PLATON Utilization of silencers to reduce the personal noise exposure in environments (27A) Sorin GABROVEANU Noise level reduction for turbofan engine, using gearbox driven low speed fan. (28A) Horia DUMITRESCU, Adina-Cristina TOMA The influence of boundary layer turbulence upon the noise radiated by an aerodynamic profile (29A) Adina NEGREA, Ioana BUSUIOCEANU, I. MAGHETI Analysis of traffic noise near the road intersections (30A)Viorel BROASCĂ, Nicolae ENESCU, Mihaela TIHAN Acoustic wave’s diffraction in case of sound-absorbent and sound insulating shields. (31A) Daniel Marius MIHAI On the dependency between railway track discontinuities and wheel rail rolling noise. (32A) Silviu PLATON Noise control in hydroelelctric station.

(33A) Doru TURCAN , Gabriel KRAFT Software for decisional support in predictive maintenance – software for automatic diagnosis of vibration data.-SKF@ptitude

(34A) Gabriel OPREA A geometrical acoustics problem approached by descriptive geometry methods. (35A) Dan ANDREI, George ANDREI Preliminary experiments for the resolution of the mathematcal model of a piston compressor working with pulsations of pressure.

(36A) Luminita VOICULESCU The influence of the rotation on the motor shaft vibration. (37A) I. MAGHETI ,C. ION, Mariana SAVU, L. IONESCU Measurement of the acoustic impedance and the absorption constant using correlation techniques (38A) D.A. IORDACHE, P.P. DELSANTO, V. IORDACHE Possibilities and limits of the transfer coefficients method

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Organizing CommitteeSession 2

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Session 4 – Ultraacoustics

(1U) Tudor ICLANZAN, Daniel STAN A possible ultrasonic thermolayer effect (2U) Gheorghe AMZA , Zoia APOSTOLESCU, Tudorel ENE Theoretical and experimantal contributions regarding ultrasonic welding process parameters of intelligent composite materials with polymeric matrix (3U) Ioan-Marian RISCA, Petru STIUCA, Veturia CHIROIU Ultrasounds effects contributions on the norway spruce seeds germination (4U) Octavian OANCĂ, Nicuşor Alin SÎRBU Aspects regarding ultraacoustic energy utilization in joining techniques of polymeric materials in automotive industry (5U) Cristian-Gheorghe TURC, Mihai-Craciun NICA, Ion GROZAV The ultrasonic assisted electrical discharge machining in boring operations. (6U) Irinela CHILIBON, V. TRIPADUS Piezoceramic transducer for material non-destructive testing.

(7U) Grigore Liviu ODOBESCU, Rares Alexandru ODOBESCU The influence of charge variation on efficiencies power transfer in case of piezoelectric transducers used for generated a high intensity field. (8U) Luminita MORARU, G. MURARIU Acoustical characterization of polycristalline metals (9U) Cristina PACHIU, Carmen MOLDOVAN, Jean-Luis IZBICKI Numerical description of the lamb waves in the micro acoustics world. (10U) Marian SOARE, Mihai Valentin PREDOI Numerical simulation of guided waves propagation in CANDU pressure tubes. Application to detection and characterization of hydride blisters. (11U) Mihai Valentin PREDOI, Andrei CRAIFALEANU, Adina NEGREA, Catalin PETRE Theoretical and experimental results on LAMB waves generated by fixed angle transducers. (12U) Larisa BUTU, Marinela MARINESCU, Angela MORARU, Claudia BORDA Theoretical research about modeling transducers with double tronconic loudspeaker for ultrasonic

cleaning. (13U) Gheorghe AMZA, Doru-Virgil PAUSAN, Victor POPOVICI Modeling using the finite element method of an ultrasonic stack used for ultrasonic spot welding.

(14U) Gheorghe AMZA, Constantin PETRICEANU The implementation of specialized software for the ultrasonic non-destructive control of composite materials. (15U) Gheorghe AMZA, Dan NITOI One degree of freedom ultrasonic rotary motor (16U) Mircea IGNAT, George ZARNESCU Piezoelectric micromotor for high axial forces. (17U) C. BORDA, V. POPOVICI, D. ARSENE, M. MARINESCU, A MORARU, L. BUTU Theoretical modeling of multidegrees of freedom ultrasonic motors for micromachine applications. (18U) Cornelia LUCHIAN, Gheorghe AMZA, Florea DUMITRACHE Theoretical and experimental contributions concerning the projection of shaped ultrasound energetic concentrator profiled type used for the ultrasound welding of mixed materials. (19U) Cristian RUGINA Numerical simulation of ultrasonic wave propagation with wedged transducers (20U) Gheorghe AMZA, Ionel Gabriel CHIRCULESCU Experimental contributions regarding the surface finishing through grinding in ultrasonic field. (21U) Ionel Gabriel CHIRCULESCU Experimental contributions regarding the surface finishing through lapping in ultrasonic field.

(22U) Ionel Gabriel CHIRCULESCU, Gheorghe AMZA Experimental contributions regarding the surface finishing through honing in ultrasonic field. (23U) Gheorghe AMZA, Oana VIRLAN Theoretical contributions regarding the design of 3 liberty degrees ultrasonic motors

Home Page Sisom 2007Session 1

Organizing CommitteeSession 2

Session 3

Session 4