POWER FLOW AND MECHANICAL INTENSITY CALCULATIONS IN STRUCTURAL FINITE-ELEMENT ANALYSIS

被引：69

作者：

HAMBRIC, SA

机构：

[1] Applied Mathematics Division (184), David Taylor Research Center, Bethesda, MD

来源：

JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME | 1990年 / 112卷 / 04期

关键词：

D O I：

10.1115/1.2930140

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The identification of power flow paths in dynamically loaded structures is an important, but currently unavailable, capability for the finite element analyst. For this reason, methods for calculating power flows and mechanical intensities in finite element models are developed here. Formulations for calculating input and output powers, power flows, and mechanical intensities for beam and plate/shell element types are derived. NASTRAN is used to calculate the required velocity, force, and stress results of an analysis, which a post-processor then uses to calculate power flow quantities. Test models include a simple truss and a beam-stiffened cantilever plate. Both test cases showed reasonable power flow fields over low to medium frequencies. © 1990 by ASME.

引用

页码：542 / 549

页数：8

共 21 条

[1]

Wohlever J.C., Bernhard R.J., Vibrational Power Flow Analysis of Rods and Beams, (1988)

[2]

Luzzato E., Ortola E., The Characterizations of Energy Flow Paths in the Study of Dynamic Systems using S.E.A. Theory, Journal of Sound and Vibration, 123, 1, pp. 189-197, (1988)

[3]

Rasmussen G., Structural Dynamic Measurements using Intensity Methods, Proceedings of the Third International Modal Analysis Conference, pp. 558-564, (1985)

[4]

Carroll G., Power Flow Measurements on a Beam with Small Localized Damping, Proceedings of the Seventh International Modal Analysis Conference, pp. 958-964, (1989)

[5]

Pavic G., Measurement of Structure-Borne Wave Intensity, Part 1

[6]

Formulation of the Methods, Journal of Sound and Vibration, 49, 2, pp. 221-230, (1976)

[7]

Pinnington E.J., Vibrational Power Transmission to a Seating of a Vibration Isolated Motor, Journal of Sound and Vibration, 118, 3, pp. 515-530, (1987)

[8]

Pavic G.S., Structural Surface Intensity: An Alternative Approach in Vibration Analysis and Diagnosis, Journal of Sound and Vibration, 115, 3, pp. 405-422, (1987)

[9]

Lyon R.L., Statistical Energy Analysis of Dynamical Systems, (1975)

[10]

Mickol J.D., Bernhard R.J., An Investigation of Energy Transmission due to Flexural Wave Propagation in Lightweight, Built-Up Structures, (1986)

← 1 2 3 →