Approximate Dynamic Response of Light Secondary Systems

John I. Parcel Fund

A monotone multigrid solver for two body contact problems in biomechanics

The purpose of the paper is to apply monotone multigrid methods to static and dynamic biomechanical contact problems. In space, a finite element method involving a mortar discretization of the contact conditions is used. In time, a new contact-stabilized Newmark scheme is presented. Numerical experiments for a two body Hertzian contact problem and a biomechanical application are reported

A Statistical Estimate of Relative Distribution of Extreme Shear in a Tall Building Subjected to Random Earthquake Shocks

Office of Naval Research. Department of the Navy.Contract N6ori-71(06), Task Order VI, Project NR-064-18

A Simple Approximation for the Fundamental Frequencies of Two-Span and Three-Span Continuous Beams

A rapid approximate method is presented for calculating the fundamental frequencies of flexural vibration of two-span beams and of particular arrangements of three-span beams which are continuous over non-deflecting supports and are elastically restrained against rotation at their end supports. The end restraints may be provided by actual coil springs or they may represent the effect of adjoining members, but in all cases the stiffnesses of these restraints are assumed to be positive. The mass per unit of length and the flexural rigidity of the beams may vary from one span to the next, but in any one span these quantities are considered constant. Two numerical examples are included to illustrate the application of the method.Office of Naval Research. Department of the Navy.Contract N60ri-071(06), Task Order VI, Project NR-064-18

Seismic Shears and Overturning Moments in Buildings

Seismic force distributions for simplified computation of shears and overturning moment for preliminary design of buildings have been generated. A parameter study of the significant variables has been made to determine the appliability of the proposed distributions. These distributions are intended to give greater accuracy than do existing procedures.National Science Foundation Grant No. AEN 75-0845

Numerical Integration for One-Dimensional Stress Waves

Office of Naval Research. Department of the Navy.Contract Nonr 1834 (03)Project NR 064-18

Final Report

Bureau of Ships, U.S. Navy.Contract NObs 55507Index No. NS-731-04

A Review of Numerical Integration Methods for Dynamic Response of Structures

Office of Naval Research. Department of the Navy.Contract N60ri-071(06), Task Order VI, Project NR-064-18

Tables of Deflection and Moment Coefficiencies for the Steady-State Vibration of Uniform Bars

Tabulated in this report are numerical values for the following quantities: (a) coefficients of steady-state deflection for a uniform bar, fixed at one end and subjected to a harmonically varying deflection without rotation at the other end, and (b) coefficients of steady-state bending moment for a uniform bar, simply supported at both ends and subjected to a harmonically varying bending moment or deflection at one end. These quantities, together with those presented in a previous report (1) * , are intended to facilitate the determination of the steady-state response and of the natural modes of bending vibration of continuous beams and frames.Office of Naval Research. Department of the Navy.Contract N6ori-71(06), Task Order VI, Project NR-064-18