Structural design for vibration isolation at Benaroya Hall

1998 ◽  
Vol 103 (5) ◽  
pp. 2907-2907
Author(s):  
Brian H. Glover
Keyword(s):  
Structural Design ◽  
Vibration Isolation

scholarly journals Implementation of the KDamper concept using disc springs

2018 ◽  
Vol 38 (1) ◽  
pp. 168-186
Author(s):  
Ioannis E Sapountzakis ◽  
Pavlos G Tranakidis ◽  
Ioannis A Antoniadis
Keyword(s):  
Structural Design ◽  
Vibration Isolation ◽  
Short Review ◽  
Optimal Combination ◽  
Negative Stiffness ◽  
External Excitation ◽  
Main Concept ◽  
Initial Displacement ◽  
Passive Vibration Isolation ◽  
Selection Of

The KDamper is a novel passive vibration isolation and damping concept, based essentially on the optimal combination of appropriate stiffness elements, which include a negative stiffness element. In this paper, after a short review of the optimal design and the selection of the parameters of the KDamper, the main concept focuses on the implementation of the negative stiffness elements with a set of Belleville (disc) springs. The major benefits of the proposed structure are the size and the robustness of the structure. The theory and the design process of the disc springs are presented thoroughly, as well as of the spiral springs with ground ends, along with an initial structural design. Simulation results from three different case scenarios are demonstrated; for an initial displacement, an initial velocity and an external excitation. The results obtained from the simulations show very satisfactory behavior.

scholarly journals Research on Structural Design of Coal Crusher House in Thermal Power Plant

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Junhu Wang
Keyword(s):  
Power Plant ◽  
Structural Design ◽  
Thermal Power Plant ◽  
Vibration Isolation ◽  
Thermal Power ◽  
Structure Selection ◽  
Starting Point ◽  
Practical Engineering ◽  
Design Requirements ◽  
Design Idea

This paper takes the specific characteristics of pulverized coal room in thermal power plant as the starting point，firstly, this paper analyzes the process layout and structure selection, and then the structural design and vibration design requirements of coal crusher house are introduced in this paper. Finally, based on the engineering example, a new structure form of vibration isolation design is creatively proposed, which provides a new design idea for the practical engineering design

Damping Structural Resonances Using Viscoelastic Shear-Damping Mechanisms: Part II—Experimental Results

1961 ◽  
Vol 83 (4) ◽  
pp. 414-424 ◽  
Author(s):  
Jerome E. Ruzicka
Keyword(s):  
Structural Design ◽  
Vibration Isolation ◽  
Level Structure ◽  
Experimental Results ◽  
Cantilever Beams ◽  
Structural Shape ◽  
Response Characteristics ◽  
Vibration Excitation ◽  
Isolation Systems ◽  
Shear Damping

This paper describes the experimental dynamic response characteristics of structural design configurations employing viscoelastic shear-damping mechanisms that have been discussed in a previous paper. Experimental results are given for cantilever beams fabricated from viscoelastic-damped sheet and structural shape members; results are also given for cantilever beams damped by use of the strip damper (an additive damping technique). The effects of shock excitation, steady-state vibration excitation, vibration excitation level, structure resonant frequency, and environmental temperature on the damping properties of the structural design configurations are demonstrated. The effects of structural damping on the performance of vibration isolation systems are determined and the significance of employing highly damped structural designs in fabrications intended for use in modern dynamic environments is discussed.

Comparison of TEM and STM observations of small silver clusters on different carbon supports

1990 ◽  
Vol 48 (4) ◽  
pp. 264-265
Author(s):  
Bernd Tesche ◽  
Tobias Schilling
Keyword(s):  
Vibration Isolation ◽  
Pyrolytic Graphite ◽  
Carbon Film ◽  
Silver Clusters ◽  
Carbon Supports ◽  
Stacking Order ◽  
System P ◽  
High Resolution Tem ◽  
High Degree ◽  
Degree Of Order

The objective of our work is to determine:a) whether both of the imaging methods (TEM, STM) yield comparable data andb) which method is better suited for a reliable structure analysis of microclusters smaller than 1.5 nm, where a deviation of the bulk structure is expected.The silver was evaporated in a bell-jar system (p 10−5 pa) and deposited onto a 6 nm thick amorphous carbon film and a freshly cleaved highly oriented pyrolytic graphite (HOPG).The average deposited Ag thickness is 0.1 nm, controlled by a quartz crystal microbalance at a deposition rate of 0.02 nm/sec. The high resolution TEM investigations (100 kV) were executed by a hollow-cone illumination (HCI). For the STM investigations a commercial STM was used. With special vibration isolation we achieved a resolution of 0.06 nm (inserted diffraction image in Fig. 1c). The carbon film shows the remarkable reduction in noise by using HCI (Fig. 1a). The HOPG substrate (Fig. 1b), cleaved in sheets thinner than 30 nm for the TEM investigations, shows the typical arrangement of a nearly perfect stacking order and varying degrees of rotational disorder (i.e. artificial single crystals). The STM image (Fig. 1c) demonstrates the high degree of order in HOPG with atomic resolution.

Vibration isolation of power tool operators

1983 ◽  
Author(s):  
C. W. Suggs ◽  
C. F. Abrams
Keyword(s):  
Vibration Isolation

An hourglass-type electromagnetic isolator with negative resistance electromagnetic shunt circuit

2020 ◽  
Vol 64 (1-4) ◽  
pp. 549-556
Author(s):  
Yajun Luo ◽  
Linwei Ji ◽  
Yahong Zhang ◽  
Minglong Xu ◽  
Xinong Zhang
Keyword(s):  
Vibration Isolation ◽  
Electromechanical Coupling ◽  
Coupling Effect ◽  
Negative Resistance ◽  
Isolation System ◽  
Amplitude Vibration ◽  
Vibration Responses ◽  
The Stability ◽  
Isolation Performance ◽  
Shunt Circuit

The present work proposed an hourglass-type electromagnetic isolator with negative resistance (NR) shunt circuit to achieve the effective suppression of the micro-amplitude vibration response in various advanced instruments and equipment. By innovatively design of combining the displacement amplifier and the NR electromagnetic shunt circuit, the current new type of vibration isolator not only can effectively solve the problem of micro-amplitude vibration control, but also has significant electromechanical coupling effect, to obtain excellent vibration isolation performance. The design of the isolator and motion relationship is presented firstly. The electromechanical coupling dynamic model of the isolator is also given. Moreover, the optimal design of the NR electromagnetic shunt circuit and the stability analysis of the vibration isolation system are carried out. Finally, the simulation results about the transfer function and vibration responses demonstrated that the isolator has a significant isolation performance.

High-Precision Positioning of Galvano Scanners by Structural Design Using Node of Vibration Modes

2011 ◽  
Vol 131 (3) ◽  
pp. 275-282
Author(s):  
Kenta Seki ◽  
Hiroaki Matsuura ◽  
Makoto Iwasaki ◽  
Hiromu Hirai ◽  
Soichi Tohyama
Keyword(s):  
High Precision ◽  
Structural Design ◽  
Vibration Modes ◽  
Precision Positioning
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