Response of Cylindrical Sandwich Shells to Moving Loads

1967 ◽  
Vol 34 (1) ◽  
pp. 81-86 ◽  
Author(s):  
G. Herrmann ◽  
E. H. Baker
Keyword(s):  
Steady State ◽  
Dynamic Response ◽  
Initial Stress ◽  
Axial Stress ◽  
Steady State Response ◽  
Sandwich Shell ◽  
Moving Loads ◽  
Axially Symmetric ◽  
Cylindrical Sandwich Shell ◽  
State Response

This paper presents an analysis into the dynamic response of a long cylindrical sandwich shell under a moving axially symmetric ring load. The shell is assumed to be orthotropic and subjected to an initial axial stress. The uniform velocity of the load is prescribed and only the steady-state response is considered. Numerical results indicate the effects of various relevant parameters. The behavior of orthotropic sandwich cylinders under initial stress is compared with that of homogeneous isotropic cylindrical shells free of initial stress, and differences are pointed out.

Steady-State Dynamic Response of a Limited Slip System

1968 ◽  
Vol 35 (2) ◽  
pp. 322-326 ◽  
Author(s):  
W. D. Iwan
Keyword(s):  
Steady State ◽  
Dynamic Response ◽  
Slip System ◽  
External Load ◽  
Initial Conditions ◽  
Viscous Damping ◽  
Steady State Response ◽  
Response Curves ◽  
State Response ◽  
System Nonlinearity

The steady-state response of a system constrained by a limited slip joint and excited by a trigonometrically varying external load is discussed. It is shown that the system may possess such features as disconnected response curves and jumps in response depending on the strength of the system nonlinearity, the level of excitation, the amount of viscous damping, and the initial conditions of the system.

Stability of a Vehicle on a Multispan Simply Supported Guideway

1978 ◽  
Vol 100 (4) ◽  
pp. 326-332 ◽  
Author(s):  
Y. I. Chung ◽  
J. Genin
Keyword(s):  
Steady State ◽  
Dynamic Response ◽  
Suspension System ◽  
Performance Criteria ◽  
Inertial Effect ◽  
Steady State Response ◽  
Span Length ◽  
Simply Supported ◽  
State Response

The dynamic response of a vehicle, with a conventional suspension system, traversing a multispan simply supported guideway system is studied parametrically. The steady state response of the system and conditions for dynamic instabilities are presented for the case where the ratio of vehicle length/span length is small. Using vehicle heave acceleration and maximum guideway deflection as performance criteria, it is shown that the interactive inertial effect is significant, even at relatively low traversing speeds.

Dynamic Response of Eccentric Face Seals to Synchronous Shaft Whirl

2004 ◽  
Vol 126 (2) ◽  
pp. 301-309 ◽  
Author(s):  
J. Wileman
Keyword(s):  
Steady State ◽  
Dynamic Response ◽  
Solution Technique ◽  
Steady State Response ◽  
Analytical Technique ◽  
State Response ◽  
Flexible Supports ◽  
Simple Matrix ◽  
The Stability ◽  
Degenerate Cases

This work provides an analytical technique for computing the seal face misalignment which results from synchronous whirl of the shaft. The eccentric dynamic response is obtained for seals in which both mating faces are mounted on flexible supports. Responses for seals with a single flexibly mounted stator or rotor are also obtained as degenerate cases of the more general result. Synchronous shaft whirl is shown to have a significant effect on the steady-state response of all these seals, while not affecting the stability threshold. The steady-state response is obtained by solution of a simple matrix equation for the general case, and can be obtained in closed form for the degenerate cases of the flexibly mounted stator or flexibly mounted rotor. A numerical example of the solution technique is presented, and the influence of speed is examined. Extension of the method to shaft motions other than synchronous whirl is briefly discussed.

Effect of gravity on steady-state response to moving loads

1973 ◽  
Vol 111 (1) ◽  
pp. 2241-2248
Author(s):  
S. N. De ◽  
P. R. Sen-Gupta
Keyword(s):  
Steady State ◽  
Steady State Response ◽  
Moving Loads ◽  
State Response

Dynamic Response of Pressurized Thin Cylindrical Shells Subjected to Torsional Loads

1973 ◽  
Vol 95 (3) ◽  
pp. 797-802
Author(s):  
P. G. Kessel ◽  
N. K. Liao
Keyword(s):  
Steady State ◽  
Dynamic Response ◽  
Biaxial Stress ◽  
Steady State Response ◽  
Thin Cylindrical Shell ◽  
Line Load ◽  
State Response ◽  
Dynamic Loadings ◽  
Torsional Loads ◽  
Shell Geometry

This paper presents a theoretical analysis of the transient and steady-state response of a thin cylindrical shell of finite length, simply supported at both ends, under a uniform initial biaxial stress and subjected to either a circumferentially tangential harmonic point force of a sinusoidally distributed harmonic line load acting in the circumferential direction. The analyses are based on both Flugge’s and Donnell’s theories. Numerical results of the steady-state response are presented for both theories to illustrate the effects of various relevant parameters on the dynamic deflection, and to provide a direct comparison between Donnell’s and Flugge’s theories for dynamic loadings. This paper establishes the range of shell geometry for which Donnell’s equations give satisfactory results in predicting the steady-state response. The dynamic behavior after the first resonant frequency and the effect of initial stress on the dynamic response are also pointed out.

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