Structure-Borne Noise and Improving Acoustic Properties of Vehicle-Mounted Power Plants

Reducing noise generated by the operation of various machines and mechanisms is an important problem, in particular in the field of power plants and, first and foremost, internal combustion engines. Noise generation due to surface vibrations in the housing is called structure-borne noise, which is one of the main manifestations of noise emerging during engine operation. We used numerical methods to determine the vibrations in external surfaces of complex-shaped engine housing parts and compute their acoustic properties. Our implementation of combined finite and boundary element methods to compute vibration parameters of structural elements and structure-borne noise respectively turned out to be quite efficient. We present the results of computational analysis of structure-borne noise for a range of automotive engines

References

[1] Tolskiy V.E., Konev A.D. Shum i vibratsiya avtomobilnykh dvigateley. [Noise and vibration of car engines]. Mashinostroenie. Entsiklopediya. T. IV-14. Dvigateli vnutrennego sgoraniya [Mechanical engineering encyclopaedia. Vol. IV-14. Combustion engines]. Moscow, Mashinostroenie, 2013, рр. 560–595.

[2] Chaynov N.D., Russinkovskiy V.S. Matematicheskoe modelirovanie strukturnogo shuma i vibratsii transportnogo dvigatelya [Mathematical modelling of vehicle structural noise and vibration]. Voprosy stroitelnoy mekhaniki i nadezhnosti mashin i konstruktsiy. Sb. nauch. tr. MADI [Problems of structural mechanics and machines and constructions reliability. Proc. MADI]. Moscow, MADI Publ., 2008 (in Russ.).

[3] Seybert A., Wu T., Li W. Acoustical prediction for structural radiation and propagation in automotive applications. SAE Techn. Paper, 1989, no. 891169, pp. 427–435. DOI: 10.4271/891169

[4] Biderman V.L. Teoriya mekhanicheskikh kolebaniy [Theory of mechanical oscillations]. Moscow, Vysshaya shkola Publ., 1980.

[5] Panovko Ya.G. Vnutrennee trenie pri kolebaniyakh uprugikh system [Internal friction in elastic system oscillations]. Moscow, Fizmatgiz Publ., 1960.

[6] Alekseev I.V., Birzi A.Kh. Metodika i nekotorye rezultaty opredeleniya koeffitsienta poter energii kolebaniy v konstruktsii DVS [Methods and some results of determination of oscillation energy loss coefficient in ICE construction]. Rabochie protsessy v DVS i ikh agregatakh. Sb. nauch. tr. MADI [Working processes in ICE and its aggregates. Proc. MADI]. Moscow, MADI Publ., 1987 (in Russ.).

[7] Brebbia C.A., Walker S. Boundary Element Techniques in Engineering. Newnes, 1980.

[8] Rabiner L.R., Gold B. Theory and application of digital signal processing. Prentice Hall, 1975.

[9] Russinkovskiy V.S., Chaynov N.D. [Using transfer functions method for numerical calculation of vibration and structural noise in engine block]. Aktualnye problemy upravleniya kachestvom proizvodstva i ekspluatatsii avtotraktornykh sredstv Materialy X MNTK [Actual problems of production quality management and motor transport exploitation. Proc. X MNTK]. Vladimir, 2004, pp. 289–291 (in Russ.).

[10] Chaynov N.D., Russinkovskiy V.S. [Methods for calculation structural noise of high-speed diesels]. Obrazovanie cherez nauku. Sb. dokl. mezhdunar. simp. ꞌꞌ175-letie MGTU im. N.E. Baumanaꞌꞌ [Education throughout science. Proc. Int. symp. ꞌꞌ175-abbiversary of Bauman MSTUꞌꞌ]. Moscow, Bauman MSTU Publ., 2006, pp. 351–357 (in Russ.).

[11] Skudrzyk E. The foundations of acoustics: basic mathematics and basic acoustics. Springer, 1972.