6926475976

84-1729

Inteipretation of Rubbing Noise Radiated from a Pin-on-Diac Configuration

C.-H. Wang and A. Soom

State Univ. of New York at Buffalo. ASME Paper No. 83-WA/NCA-4

Key Word*: Disks. Contact v<bration, Noije generation

The aound radieted due to rubbing action by a ditc in contact with a nominally stationery pin it modeled by combining the normal force exc'nation at the contact with «»ce-aver-aged ditc and encloture regonie*. The contact forcet ara auociatad with contact vibrationt that ara davaiopad at turface irregularities ara swapt through the contact region. A relatively ttraightforward phyaical intarpratation of the contributiont of theta effects to the radieted noise it thown to ba posstole.

Academy of Sciences. Bratislava, Czechoslovakia. Strojmcky Casopis, (1*2), pp 17° 194 (1984) 21 figs. 5 refs (In Slovak)

Kty Wordt: Platat, Automobile bodias, Resonant ran>ont*, Finita element technique. Transfer matrix method

Tha tolution of dynamie ratponte of thinwallad paneit of carriaga bodie* it pratantad. Thaoratical tolution it batad on tha applicetion of the method FETM. which it tha problam-oriantad combination of tha finita element method with tha method of tramfer matricet. The dariwation of transfer matrice* dealing with tha thaory of smali at wali at of large daformationt it indicatad. The aquationt of motion are tolwad on tha batis of combination of the FE TM concept with the Wilton 0-method of numarical integration in time. Numarical at wali as experimental warification of prasant thaoratical Solutions it parformad. Tha raai thinwalled panel of the automobil Skoda 1203 it studied. Obtainad retults submrt comprehansion of tha raał retonance behavior of studied thinwalled elements.

84-1730

Efftcieney of AnnuUr Finite Element* for Flexttrml Yibration* of Thick Diaka

P. Priolo and C. Sitzia

Inst. of Mech. Engrg., Univ. of Cagliari, Cagliari, Italy, J. Sound Vib.,_92 (1). pp 21-31 (Jan 8. 1984) 4 figs, 4 tables, 11 refs

Key Words: Ditkt, Flexural yibration, Finita element tech-niqua. Tran warta thaar def ormetion effectt, Rotatory inertie affactt

The eff iciency it ewaluatad of vark>ut tamie na lytlcal annular finita aiamantt in pradicting the vibrationel modet for ditkt where the affact of transwerte thaar and rotary inertia baco met importem, with reference both to tha minimum num-bar of dagraat of fraadom and to tha minimum number of operatione raquirad to achiava a certain approximation for tha axact naturaI fraquancy valua. From thit point of wiew. a naw element, in which normal dńplacementt ara inter-polatad by cubic polynomialt and rotationt by parabolic polynomialt akmg the radiu*. it compared with othar ale-mamt deser ibed in tha lltaratura.

84-1732

Magnetobydrodynamic FIow Between Torcionally Oscfllating Eccentric Diki

P.R. Rao

Indian Inst. of Science, Bangalore^BGO 012, India. Intl. J. Engrg. Sci..J22.(4). pp 393-402 (1984) 7 figs. 3 refs

Key Words: Ditkt. Magnatohydrodynamict

Tha unstaedy MHD flow of en inoomprettible, witcout electrically conducting fluid contained batwaan two tor-tionally osciilatłng eccentric ditkt it inwastigatad. Tha State of uniform rotation of tha central region vlsualized in tha staady flow is abterit in tha case of oscillatory flow.

SHELLS

84-1731

Reaoaanee Retponae of Thintralled Element* of Carrtage Bodie*

A. Te$ar and P. Tesar

Inst. of Structures and Architecture of the Slovak

84-1733

Conoentrated Edge Loada on Hypeiboloidal Shell»

J.A. Dumitrescu and D.P. Bilłington

Structural Analysis Group. United Engineers and

Constructors, Philadelphia. PA. ASCE J. Struć.