نتایج جستجو برای: dynamic stiffness

تعداد نتایج: 445201  

2014
Jing Zhang Zongquan Deng Hongwei Guo Rongqiang Liu

Deployable trusses that are widely applied in space missions utilize many hinged members to adapt to different geometrical shapes and work conditions. This paper presents two improved finite elements for a link and a bending beam to calculate dynamic characteristics of non-jointed and jointed trusses. First, the axial and transverse wave motion equations of a beam are used to get the shape func...

Journal: :Cardiovascular research 1998
T Ruf H Schulte-Baukloh J Lüdemann H Posival F Beyersdorf H Just C Holubarsch

CONDENSED ABSTRACT We analyzed actomyosin cross-bridge kinetics in human atrial and ventricular muscle strip preparations by using sinusoidal length changes from 0.1 to 60 Hz. The minimum stiffness frequency was higher in atrial than in ventricular human myocardium and lower in failing than in non-failing left ventricular human myocardium. beta-Adrenergic stimulation increased the minimum stiff...

2010
A. M. Vaidya P. M. Padole

This paper deals with the study of joint clearance on kinematics of mechanism and bearing stiffness along with links flexibility on modal analysis at higher frequency. Literature survey reveals that the studies were carried out for highspeed mechanism considering linkage flexibility without considering bearing stiffness. The method of calculating clearance at joints, checking for orientation of...

2006
Andrew Kemper Craig McNally Dave McNeely Fumio Matsuoka Stefan Duma

There have been numerous researchers that have investigated the properties of human intervertebral discs. However, there has been no attempt to characterize the effects of loading rate on the stiffness of human intervertebral discs. The purpose of this study was to develop the compressive stiffness properties of individual lumber intervertebral discs when subjected to various dynamic compressiv...

Journal: :IEEE Transactions on Industrial Electronics 2015

Journal: :Biophysical journal 2009
S Féréol R Fodil V M Laurent M Balland B Louis G Pelle S Hénon E Planus D Isabey

This study aims at improving the understanding of mechanisms responsible for cell sensitivity to extracellular environment. We explain how substrate mechanical properties can modulate the force regulation of cell sensitive elements primarily adhesion sites. We present a theoretical and experimental comparison between two radically different approaches of the force regulation of adhesion sites t...

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