Josef Voldřich

 

     Born in Vimperk in 1956. He completed his MSc. study of applied mathematics at the Faculty of Mathematics and Physics, Charles University Prague in 1980. He achieved scientific degree CSc. at the Mathematical Institute of the Academy of Sciences of the Czech Republic in the mathematical analysis field in 1987. His advisor was prof. Kufner. In the period 1981-1985 he was affiliated at the Department of Mathematics, University of West Bohemia in Pilsen. In 1985 he was awarded by the section for scientific and professional literature of the Czech literary fund. During 1985-1995 he worked for Central Research and Testing Institute of SKODA Pilsen as a researcher. He was dealing with development of FEM software for the concern SKODA. After the embargo for the similar software packages import had been overruled he specialized on problems of extreme loading especially for nuclear engineering and power industry. He is the author of large computations of strength and lifetime for a set of construction parts of the upper blocks of the reactors VVER 440 and VVER 1000 for SKODA JS Inc. In recent decade he is dealing with mathematical modeling of some problems of transport engineering, facilities for radioactive waste safe transport and storage, and problems of terminal ballistics in nuclear energetic. Since 2000 he is in the head of department at New Technologies Research Center, University of West Bohemia in Pilsen. He participated in solving LN00B084 research project supported from the Ministry of Education CR.

     Professional activities since 2000 in mechanical engineering

- Participation in the vibration and noise analysis of the MQ200 gearbox for the development department of SKODA Auto Inc.,

- author of the drop test evaluation of the SKODA 440/84-M basket of transport and storage container CASTOR for the spent nuclear fuel for SKODA JS Inc.. and concern GNS, cooperation in the development of the basket, author of the strength part of the documentation for its licensing in Germany,

- participation in solving actual problems of flanged connections and socket joints for the VVER reactor class upper blocks including problems of new technology for sealing of this joints by rings from expanded graphite, that was developed by SKODA JS Inc. and implemented in a number of nuclear power plants,

- performing analysis of dynamic effects of a large airplane impact on the reference transport and storage containers, coauthor of the overall analysis of hypothetical terrorist attack to the projected interim storage of spent nuclear fuel in the Temelín nuclear power plant location,

- cooperation in the qualifying of problems of brake disc heating solved by the New Technologies Research Center for the development department of SKODA Auto Inc. and for the research department of Volkswagen AG in Wolfsburg,

- participation in solving actual problems of mufflers of exhaust systems for the development department of SKODA Auto Inc,

- author of the essay Brakes, thermal and thermoelastic analysis published in Encyclopedia of Thermal Stresses,

- author of software for the nonlinear vibration analysis of bladed disks with friction contacts between blades.

 

    Further he authored or coauthored 130 closed research reports on mechanical engineering and applied mathematics. He is the author of cca 70 reviews for the Mathematical Reviews of the American Mathematical Society.

 

Publications:

 

[77] Voldřich, J., Polach P., Lazar J., Míšek T.: Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades. Procedia Engineering (accepted)

 

[76] Očenášek J., Voldřich, J.: One-dimensional mathematical model of oil extraction process in a continuous screw press. Extended abstract, 30th conference Computational Mechanics 2014

 

[75] Voldřich, J., Míšek T., Kellner J., Lazar J., Morávka Š.: Analýza nelineárního kmitání olopatkovaných disků s kontaktními třecími vazbami mezi lopatkami. Sborník konference TURBOSTROJE 2014, ASI-Turbostroje-Plzeň, ISBN 978-80-260-6447-3

 

[74] Voldřich, J.: Brakes, thermal and thermoelastic analysis. In: Hetnarski R. (Ed.), Encyclopedia of Thermal Stresses, Vol 1, pp486-497, Springer Dordrecht, Heidelberg, New York, London  2014, DOI 10.1007/978-94-007-2739-7

 

[73] Voldřich, J., Morávka, Š.: The calculation of friction damping of integral shrouded blades LSB 48“ for torsional excitation of the disk. Extended abstract, 29th conference Computational Mechanics 2013

 

[72] Voldřich, J.: Couette slip flow with sideways pressure gradient for non-Newtonian power-law fluid. 12th conference on Power System Engineering, Thermodynamics & Fluid Flow – ES2013, June 13-14, 2013, Pilsen, ISBN 978-80-261-0230-4

 

 [71] Voldřich, J., Morávka, Š.: Contact stiffness modeling in numerical analysis of nonlinear vibrations of bladed disks with friction contact interfaces. In: Vibration Problems ICOVP 2011, Supplement, The 10th International Conference on Vibration Problems, 2011

 

[70] Voldřich, J., Morávka, Š.: An application of cyclic symmetry in analysis of nonlinear multiharmonic vibrations of bladed disks with friction contact. Extended abstract, 26th conference Computational Mechanics 2010, ISBN 978-80-7043-919-7

 

[69] Honner, M., Šroub, J., Švantner, M., Voldřich, J.: Frictionally excited thermoelastic instability and the suppression of its exponential rise in disc brakes. Journal of Thermal Stresses, Vol. 33, 2010, pp. 427-440. ISSN 0149-5739.

 

[68]  Očenášek, J., Voldřich, J.: Mathematical modeling of a biogenous filter cake and identification of oilseed material parameters. Applied and Computational Mechanics, Vol 3, No.2, 2009, pp. 2339-2350. ISSN 1802-680X

 

[67]  Honner, M., Šroub, J., Voldřich, J.: Frictionally excited thermoelastic instability and suppression of its exponential rising in disc brakes. Proceedings of the 8th International Congress on Thermal Stresses, TS2009, 1–4 June, University of Illinois at Urbana-Champaign, 305-308.

 

[66] Voldřich J.: Modelling of the three-dimensional friction contact of vibrating elastic bodies with rough surfaces. Applied and Computational Mechanics 3 (2009) 241-252.

 

[65]  Matas R., Kňourek J., Voldřich J.: Influence of the terminal muffler geometry with three chambers and two tailpipes topology on ist attenuation characteristics. Applied and Computational Mechanics 3 (2009) 121-132.

 

[64] Voldřich J.: Srážky a rázové děje v  inženýrství. Ve sborníku: Modelování a měření interakcí v mechanice, editor R. Matas, str. 237-260. Škoda Výzkum, s.r.o., a ZČU Plzeň, Nečtiny, květen 2008. ISBN 978-80-02-02031-8.

 

[63] Voldřich J., Lang V., Litoš P., Morávka Š., Šroub J.: Thermomechanical Instabilities of Friction Systems – Measurements and Computations. National conference with international participation Engineering Mechanics 2008, Svratka, Czech Republic, May 2008, ISBN 978-80-87012-11-6.

 

[62] Voldřich J.: Separation of contact in a sliding system with frictionally excited thermoelastic instability. Applied and Computational Mechanics 1 (2007) 357-362.

 

[61]  Nový Z., Duchek  M., Džugan J., Mentl V., Voldřich J., Tikal B.: Zkoušky vzorků tahokovu a počítačové modelování jejich mechanických vlastností. 45th International Conference EAN, červen 4-7, 2007.

 

[60] Voldřich J.: Frictionally excited thermoelastic instability in disc brakestransient problem in the full contact regime. International Journal of Mechanical Sciences 49 (2007) 129-137.   60.pdf

 

[59] Voldřich J.: Vibrace lopatek rotujících zařízení z pohledu matematického modelování. Výzkumná zpráva NTC06-03/07, Nové technologie –Výzkuné centrum, ZČU v Plzni.

 

[58] Voldřich J.: Počítačové modelování deformačních a napěťových odezev tahokovu. Výzkumná zpráva NTC06-03/07, Nové technologie –Výzkuné centrum, ZČU v Plzni.

 

[57] Voldřich J., Morávka Š., Študent J.: Transient temperature field in intermittent sliding contact at temperature dependent coefficient of friction, Computational Mechanics 2006 - 22th conference with international participation, pp. 697-704. Nečtiny, ČR, listopad 2006. ISBN 80-7043-477-5   57.pdf

 

[56] Matas R., Voldřich J., Tikal B.: Užití metody konečných prvků pro stanovení účinnosti akustických tlumičů, Computational Mechanics 2006 - 22th conference with international participation, pp. 347-354. Nečtiny, ČR, listopad 2006. ISBN 80-7043-477-5   56.pdf

 

[55]  J. Voldřich, B. Tikal, J. Jankovec, M. Kepka, S. Švéd, Z. Malkovský : Numerické simulace srážky lokomotivy 85EM s referenční překážkou. Computational Mechanics 2005 - 21th conference with international participation, Nečtiny, ČR, listopad 2005

 

[54]  L. Pečínka, Š. Morávka, J. Voldřich: Lessons learned from mathematical modeling of deep surface cracks and internal voids of thick walled concrete structures using impact-echo method. The 4th International ConferenceSafety Assurance of Nuclear Power Plants with WWER“ , Podolsk, Moscow Region, Russia 23-25 May, 2005

 

[53]  Voldřich J., Študent J., Adlerová J.: Computer aided modeling of temperature and stress fields in control assembly nozzles attachment to reactor WWER440 pressure vessel head, New Technologies - Research Centre in the Westbohemian, 2004, University of West Bohemia, Plzeň

 

[52]  Morávka Š., Voldřich J.: Numerical simulation of the nuclear power plants steel-concrete structures diagnostics by the "Impact-echo" method, New Technologies - Research Centre In The Westbohemian, 2004,  University of West Bohemia, Plzeň

 

[51] Voldřich J.: Modelování nerovnoměrností ohřevu brzdového disku během brzdění, Computational Mechanics 2004 - 20th conference with international participation, Nečtiny, ČR, listopad 2004

 

[50]  Morávka Š., Voldřich J.: Numerické modelování diagnostiky různě hlubokých trhlin a plochých dutin betonových konstrukcí J.E. metodou "IMPACT-ECHO", Computational Mechanics 2004 - 20th conference with international participation, Nečtiny, ČR, listopad 2004

 

[49]  Buchar J.,Voldřich J., Rolc S.: Evaluation of the explosive technology of tube fixing, In Proceedings of the grant workshop: Fracture Damage of Structural Parts, September 2004, Ostrava, pp. 69–75. Published by VSB – TU Ostrava. ISBN 80 – 248 – 0615 – 0

 

[48] Voldřich J.: Teplotní skvrny v brzdách (příklad nestability v inženýrské praxi). Modelování a měření v termomechanice kontinua, 26.-29.5. 2004, Rybník. VTS Škoda Výzkum, Plzeň, 2004, ISBN 80-02-01654-8.

 

[47] Voldřich J., Morávka Š.: Effect of surface layers on the propensity of disk brakes to frictionally excited thermoelastic instability during extreme braking, Engineering Mechanics 2004 – National conference with international participation, Svratka, ČR, květen

 

[46]  Morávka Š., Voldřich J.: Application the "Impact-echo" method to the concrete structure diagnostic in     NPP building, Engineering Mechanics 2004 – National conference with international participation, Svratka, ČR, květen 2004

 

[45] Pečínka L., Morávka Š.,  Voldřich J.: Mathematical model of the propagation P, S and R-waves in a conctrete thick walls with rebars and cracks. CSNI/RILEM Workshop on Use and Performance of Concrete in NPP Fuel Cycle facilities, March 15-16 2004, Madrid

 

[44] Buchar J., Voldřich J., Rolc S.: Shock induced damage in austenitic stainless steel. 1st International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena (ESHP Symposium), March 15-17, 2004, Kumamoto, Japan, Trans. Tech. Publications, Switzerland-Germany-UK-USA, 2004, pp. 67-72. ISBN 0-87849-950-4. Materials Science Forum Vols 465-466 (2004), pp. 67-73.

 

[43]  Buchar J., Voldřich J.: Terminální balistika. Academia, Praha 2003.  

        ISBN 80-200-1222- 2   43.pdf

 

[42] Morávka Š., Voldřich J.: Příspěvek numerické simulace k detekci armování a trhlin v železobetonu, Computational Mechanics 2003 - 19th conference with international participation, Nečtiny, ČR, listopad 2003

 

[41] Voldřich J., Morávka Š.: Modelling of frictionally excited thermoelastic instability in automoive disk brakes with vents.  New Technologies - Research Centre In The Westbohemian, 2003, p. 17-27, University of West Bohemia, Plzeň.

 

[40] Voldřich J.: Impact of rotating long stiff missile and its transit through target.  New Technologies - Research Centre In The Westbohemian, 2003, p. 9-15, University of West Bohemia, Plzeň.

 

[39] Voldřich J., Morávka Š.: Modelování třením vyvolané termoelastické nestability v automobilových větraných diskových brzdách.  Proceedings of the 2nd International Conference on Dynamics of Civil Engineering and Transport Structures and Wind Engineering, Žilina, 2003, p. 337-340.

 

[38] Voldřich J., Morávka Š.: Analysis of frictionally excited thermoelastic instability and hot spots in automotive disk brakes. Engineering Mechanics 2003 National conference with international participation, may 12-15 2003, Svratka

 

[37] Voldřich J.: Neumann problem for elliptic equation in Sobolev power weighted spaces. Mathematics and Computers in Simulation, vol. 61 (2003) 199-207   37.pdf

 

[36] Voldřich J.: Averaging over N-dimensional balls and Cauchy problem for equations of mathematical physics.  J. Math. Anal. Appl. 272 (2002) 582-595   36.pdf

 

[35] Buchar J., Voldřich J.: Modeling of fast dynamic phenomena with dominant non-linear material response.  New Technologies - Research Centre In The Westbohemian, 2002, p.15-20, University of West Bohemia, Plzeň.

 

[34] Buchar J., Voldřich J., Rolc S.: Response of concrete to the impact of fragments simulating projectiles. 20TH International Symposium on Ballistics, Lancaster, Pennsylvania, USA, September 2002, p.1079-1086, DEStech Publications, Inc., USA.

 

[33] Buchar J., Voldřich J., Rolc S.: Ballistics performance of the dual hardness armour. 20TH International Symposium on Ballistics, Lancaster, Pennsylvania, USA, September 2002, p.1071-1078, DEStech Publications, Inc., USA.

 

[32] Buchar J., Voldřich J.: Identification of elastic properties of materials of larger bodies.. 40th Interational Conference Experimental Stress Analysis, Praha, June 2002, p.21-26, Czech Technical University in Prague Faculty of Mechanical Engineering, Department of Mechanics, Division of Strength of Materials, Czech Republic.

 

[31] Voldřich J., Tikal B., Študent J.: Some computational simulations of impacts and penetrations in nuclear engineering. New Technologies - Research Centre In The Westbohemian, 2002, p.9-14, University of West Bohemia, Plzeň.

 

[30] Voldřich J.: Průměrování přes koule a vybrané souvislosti. Modelování a měření v mechanice kontinua. Konstitutivní vztahy, Nečtiny, červen 2002, str.117-124, VTS ŠKODA VÝZKUM, Plzeň.

 

[29] Voldřich J.: Termoelastická nestabilita ve větraném automobilovém kotouči vyvolaná třením. 18. konference s mezinárodní účastí Výpočtová mechanika 2002, Nečtiny, říjen 2002, str.497-502, Západočeská univerzita v Plzni.

 

[28] Buchar J., Voldřich J., Rolc S.: Penetration process in the armour of dual hardness. Singapore University Press, Singapore 2001, ISBN 9810438311

 

[27] Buchar J., Voldřich J., Rolc S.: Explosive loading of dual hardenss steel plates.  Proceedings of the 14th International Symposium on Impact Engineering, 16 - 18 July, 2001 Kumamoto, Japan, Eds.Akira Chiba, Shinji Tanimura and Kazuyuki Hokamoto, Elsevier, Amsterdam - London - New York - Oxford - Paris - Shannon –

 

[26] Buchar J., Rolc S., Voldrich J., Lazar M., Starek M. The development of the glass laminates resistant to the small arms fire. 19th International Symposium of Ballistics, Interlaken, Switzerland, May 2001.

 

[25] Buchar J., Voldřich J.: Numerical simulation of the wood response to the high velocity loading. 3rd European LS-DYNA Conference, Paris 2001

 

[24] Voldřich J.: Influence of dynamic material hardening on propagation of stress impulse through plastic region. Proceedings of the 17 th conference Computational Mechanics with International Participation, Nečtiny 2001

 

[23] Zeman V., Dupal J., Hlaváč Z., Kovář L., Voldřich J.: Vibration analysis of the car gear-box. Engineering Mechanics 2001, National Conference with International Participation. Svratka, ČR 2001

 

[22] Voldřich J., Kovář L.: Evaluation of vibrations and sound power radiated by a gear box. Proceedings of the 17 th conference Computational Mechanics, Nečtiny 2001

 

[21] Buchar J., Voldřich J. : Elastic response of shell to impact loading.The 2nd IMACS Conference on Mathematical and Computational methods in Mechanics, Physics, Biomechanics and Geodynamics. MODELLING 2001, Pilsen, June 25 – 29, 2001 – Sborník abstraktů

 

[20] Očenášek J., Študent J., Voldřich J.: Computer simulations of waves in rod after its impact against a rigid barrier. Proceedings of the 17 th conference Computational Mechanics, Nečtiny 2001

 

[19] Voldřich J., Gregor J., Študent J.: Stress and life-time analysis of reactor VVER1000 JETE pressure vessel upper block units. Computational Mechanics 2000, 16th Conference with International Participation

 

[18] Voldřich J.: Fraktály – nový pohled na geometrii přírody.  Modelování a měření turbulence, Nečtiny 2000, VTS ŠKODA VÝZKUM, Plzeň,  ISBN 80-238-5533-6.

 

[17] Holeček M., Voldřich J.: Averaging over d-dimensional spheres. Proceeding of UWB, 1999

 

[16] Holeček M., Voldřich J.: Averaging over spheres in scale-dependent models.  15th conference Computational Mechanics 2000, Nečtiny 1999

 

[15] Voldřich J.: Sálání v rotačně symetrických dutinách s pohlcujícím prostředím. 14. konference Výpočtová mechanika 98, Pernink 1998. pp.271-276, ISBN 80-7082-461-1

 

[14] Martinec P., Voldřich J.: Výpočetní simulace rychlého dynamického děje pro případ úlomku turbínové lopatky. 14. konference Výpočtová mechanika 98, Pernink 1998. pp.189-194, ISBN 80-7082-461-1

 

[13] Holeček M., Malotín V., Martinec P., Peleška P., Voldřich J.: Turbine disintegration debrits. International conference NUSIM 97, Trnava 1997

 

[12] Malotín V., Voldřich J.: Penetration of turbine body by flying torn blade. PAM 97 Proceedings, ESI Group 1997

 

[11] Voldřich J., Miler J.: An implementation of thermoelastoplastic model in two dimensions. Proceedings of the 6th International Conference, Mathematical methods in Engineering, Plzeň 1991

 

[10] Voldřich J.: Výpočtové metody v mechanice kontinua. Mechanika ve strojírenství, ČSVTS-ÚVZÚ s.p. ŠKODA Plzeň, 1990, str. 132-152.

 

[9] Miler J., Voldřich J.: Geometrická nelinearita v MKP. Výpočtová mechanika 87, VI. Uživatelský seminář, VŠSE Plzeň, 1987, str. 17-23.

 

[8] Voldřich J.: Užití Sobolevových váhových prostorů k řešení eliptických okrajových úloh. Disertace, MÚ AV ČR, Praha, 1986   8.pdf

 

[7] Voldřich J.: A remark on the solvability of the Dirichlet problem in Sobolev spaces with power-type weights. Comment. Math. Univ. Carolinae 26 (1985), 745-748. MR 87h:35121   7.pdf

[6] Voldřich J.: On the Dirichlet boundary value problem for nonlinear elliptic partial differential equations in Sobolev power weight spaces. Časopis pro pěst. matematiky 110 (1985), 250-269. MR 87a:35084   6.pdf

[5] Kufner A., Voldřich J.: The Neumann problem in weighted Sobolev spaces. C.R.Math.Rep.Acad.Sci.Canada, vol. VII, no. 4 (1985), 239-243. MR 86k:35038

[4]  Voldřich J.: On solvability of the Stokes problem in Sobolev power weight spaces. Comment. Math. Univ. Carolinae 25,2 (1984), 325-336. MR 86d:35123   4.pdf

[3] Voldřich J.: The ranges of nonlinear operators of the polynomial type. Comment. Math. Univ. Carolinae 23,4 (1982), 671-684. MR 84m:47085   3.pdf

[2] Voldřich J.: Nonlinear noncoercive operator equations (in Czech). Graduate thesis, Charles University, Prague, 1980.

[1] Voldřich J.: Gradual partition of a graph into complete graphs. Časopis pro pěst. matematiky 103 (1977), 8-16  1.pdf