TY - JOUR AU - Vehovszky, Balázs AU - Bohus, Dávid AU - Gazdagh, Zoltán Gábor AU - Eichinger, Benjamin TI - Application analysis of restoring force surface method, detection of non-symmetrical pretension of cylindrical test-specimens JF - NOISE-CON PROCEEDINGS J2 - NOISE-CON PROCEEDINGS VL - 268 PY - 2023 IS - 4 SP - 4800 EP - 4806 PG - 7 SN - 0736-2935 DO - 10.3397/IN_2023_0682 UR - https://m2.mtmt.hu/api/publication/34780359 ID - 34780359 AB - In classical linear dynamics, the modal analysis or transfer function measurement gives a very good bases to understand dynamics of structures, however, in other cases nonlinear testing methods - like Restoring Force Surface (RFS) method - can be used to detect nonlinear characteristics. RFS works with a pushplate-structure-pushplate measurement setup, where inappropriate preparation of the setup, e.g. uneven pretension, may cause highly erroneous results. A detailed analysis is described in this paper for RFS measurement of cylindrical samples, where evaluation was made in the first compression resonance. Beside presenting the measurement principles, the non-uniform pretension as well as other influencing effects are detailed, and an optimized way of execution is proposed for this measurement method. LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Viktor AU - Gazdagh, Zoltán Gábor AU - Vehovszky, Balázs TI - Comparative analysis of stiffness measurement methods for lamination stacks in electric machines JF - JOURNAL OF PHYSICS-CONFERENCE SERIES J2 - J PHYS CONF SER VL - 2677 PY - 2023 IS - 1 SP - 9 SN - 1742-6588 DO - 10.1088/1742-6596/2677/1/012002 UR - https://m2.mtmt.hu/api/publication/34780239 ID - 34780239 AB - With the increasingly strict global regulations on vehicle emissions, the demand for electromobility has risen due to its potential to reduce local emissions. However, designing an electric motor for use in passenger cars poses significant challenges. The e-motor should operate reliably in various climates with good mechanical and electrical characteristics, be lightweight, withstand repetitive thermal and structural loads, be cost-effective, and - last but not least - exhibit good noise and vibration properties. To meet these requirements, virtual testing through simulations has become the most efficient and economical approach, enabling the identification of weaknesses and unwanted behaviors before physical prototyping. This paper focuses on the testing of lamination stacks, a critical component of electric motors. Two methods of stiffness measurement for such parts are compared: static stiffness determination and dynamic analysis. The former involve compressing the specimen and measuring the force-displacement response, while dynamic method uses the restoring force surface method to obtain the stiffness and damping characteristics. The study highlights the importance of considering nonlinearity in stiffness measurements. The stiffness of lamination stacks varies depending on the pretension state, and a significant hysteresis exists between the loading and unloading curves. The paper discusses the experimental procedures for each method. The findings emphasize the necessity of accurate stiffness characterization for different applications, such as structural strength, modal analysis, dynamic analysis, and noise-vibration-harshness (NVH) studies. The research contributes to the development of electric machines by providing insights into effective stiffness measurement techniques for lamination stacks. LA - English DB - MTMT ER - TY - CONF AU - Gazdagh, Zoltán Gábor AU - Fukker, Bertalan TI - Advancements in NVH: Innovations shaping the future of quieter and smoother mobility experiences T2 - Proceedings of NVHH 2023 PY - 2023 SP - 56 EP - 57 PG - 2 UR - https://m2.mtmt.hu/api/publication/34780216 ID - 34780216 LA - English DB - MTMT ER - TY - CONF AU - Ács, Dániel AU - Gazdagh, Zoltán Gábor TI - Exploring the impact of RPM related excitation on transfer function distortion in E-Drive systems T2 - Proceedings of NVHH 2023 PY - 2023 SP - 54 EP - 55 PG - 2 UR - https://m2.mtmt.hu/api/publication/34780200 ID - 34780200 LA - English DB - MTMT ER - TY - CONF AU - Á., Bartus AU - Gazdagh, Zoltán Gábor TI - Case study of blocked force synthesis using free velocity method T2 - Proceedings of NVHH 2023 PY - 2023 SP - 21 EP - 22 PG - 2 UR - https://m2.mtmt.hu/api/publication/34780186 ID - 34780186 LA - English DB - MTMT ER - TY - CONF AU - Gábos, Zoltán AU - Gazdagh, Zoltán Gábor AU - Dombóvári, Zoltán TI - Engineering examples for recognizing some specific types of forced nonlinear behaviour T2 - Proceedings of NVHH 2023 PY - 2023 SP - 74 EP - 78 PG - 5 UR - https://m2.mtmt.hu/api/publication/34471462 ID - 34471462 LA - English DB - MTMT ER - TY - CHAP AU - Gábos, Zoltán AU - Gazdagh, Zoltán Gábor AU - Dombóvári, Zoltán ED - Kossa, Attila TI - CASE STUDY: DYNAMIC COUPLING EFFECT ON FORCING OF A NONLINEAR BEAM-SHAKER STRUCTURE WITH ADJUSTABLE EDDY CURRENT DAMPING T2 - Book of Abstracts. 39th Danubia-Adria Symposium on Advances in Experimental Mechanics. 2023 Hungary PB - Gépipari Tudományos Egyesület (GTE) CY - Siófok SN - 9789634219279 PY - 2023 SP - 40 EP - 41 PG - 2 UR - https://m2.mtmt.hu/api/publication/34189140 ID - 34189140 LA - English DB - MTMT ER - TY - CHAP AU - Gábos, Zoltán AU - Gazdagh, Zoltán Gábor AU - Dombóvári, Zoltán ED - Baksa, Attila ED - Bertóti, Edgár ED - Kiss, László Péter TI - Változtatható közel lineáris örvényáramú csillapítóelem fejlesztése egy geometriai nemlinearitással rendelkező, két végén befogott homogén rúd rezgésének csillapítására T2 - XIV. Magyar Mechanikai Konferencia, Az előadások összefoglalói PB - Miskolci Egyetem, Gépészmérnöki és Informatikai Kar CY - Miskolc-Egyetemváros SN - 9789633583012 PY - 2023 SP - 72 EP - 72 PG - 1 UR - https://m2.mtmt.hu/api/publication/34133143 ID - 34133143 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Vehovszky, Balázs AU - Martin, Kaszab AU - Gazdagh, Zoltán Gábor ED - Vehovszky, Balázs ED - Hlinka, József TI - A Dynamic Method for Measuring Torsional Stiffness of a Vehicle Chassis T2 - 38th International Colloquium on Advanced Manufacturing and Repair Technologies in Vehicle Industry PB - Gépipari Tudományos Egyesület (GTE) CY - Budapest SN - 9789639058484 PY - 2023 SP - 1 EP - 4 PG - 4 UR - https://m2.mtmt.hu/api/publication/34028214 ID - 34028214 LA - English DB - MTMT ER - TY - JOUR AU - Manzato, Simone AU - Gazdagh, Zoltán Gábor AU - Vehovszky, Balázs AU - Anna Ottaiano, Simona TI - A general framework for the experimental characterization of nonlinearities and its application to a laminated assembly of an electrical motor JF - SAE TECHNICAL PAPERS J2 - SAE TECHNICAL PAPERS VL - 5 PY - 2023 IS - 2 SP - 849 EP - 859 PG - 11 SN - 0148-7191 DO - 10.4271/2022-01-0944 UR - https://m2.mtmt.hu/api/publication/32818098 ID - 32818098 LA - English DB - MTMT ER -