Georg Duffing
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Georg Wilhelm Christian Caspar Duffing (born April 11, 1861 in
Family and career
Georg Duffing was born in 1861 in the Baden town of Waldshut as the eldest son of merchant Christian Duffing and his wife Julie Spies. In 1862, the family moved to
After completing his studies, possibly without taking an examination, Duffing joined
In 1918, he published his widely noticed work on pendulum oscillations, later known as the Duffing oscillator.
In 1921, financially troubled, he joined the Hamburg-based Ölwerke Stern-Sonneborn AG (Ossag), where he dealt with the friction behavior and viscosity of lubricating oils and headed the company's development laboratory. Due to a lubricating oil-related accident of the SS Cap Arcona in 1929, Duffing, who had to fight for his reputation in court due to internal politics in the company, fell into professional ruin.
In 1931, Duffing moved back to Berlin.
Due to air raids on Berlin, he sought refuge in Schwedt, where he died on April 5, 1944. Georg Duffing was buried in Berlin at the Friedhöfe vor dem Halleschen Tor.
Duffing held various technical patents in Germany and the USA.
Publications
- Beitrag zur Bestimmung der Formveränderung gekröpfter Kurbelwellen, Springer, Berlin, 1906.
- Erzwungene Schwingungen bei veränderlicher Eigenfrequenz, F. Vieweg, Braunschweig, 41/42, 1918.
- Reibungsversuch am Gleitlager, Verein Deutscher Ingenieure -Zeitschrift, 72 (15), 495–499, 1928.
- Elastizität und Reibung beim Riementrieb, Forschung auf dem Gebiete des Ingenieurwesens, 2 (3), 99–104, 1931.
- Messung der Zähigkeit durch gleichförmige koaxiale Bewegung einer Kugel in einem Kreiszylinder, Zeitschrift für Angewandte Mathematik und Mechanik, 13, 366–373, 1933.
- A new form of absolute viscometer, First World Petroleum Congress (London, UK), July 18–24, 1933.
Further reading
- F.P.J. Rimrott: Georg Duffing (1861–1944), Technische Mechanik, Band 14, Heft 1, 1994 (PDF)
- Ivana Kovacic, Michael J. Brennan: The Duffing Equation: Nonlinear Oscillators and Their Behaviour, John Wiley & Sons, 2011, 386 S.[1]
References
- ^ Ivana Kovacic, Michael J. Brennan: The Duffing Equation: Nonlinear Oscillators and Their Behaviour, John Wiley & Sons, 2011, p. 1
External links
- Georg Duffing on Atomosyd.net
- Duffing Oscillator at Scholarpedia