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A shaking table substructure testing method for the

A novel shaking table substructure testing method that includes interaction forces determined by actuator forces and shaking table dynamic parameters is proposed and validated. The seismic performance of a storage tank that incorporates soil-structure interactions is investigated by the method proposed in this article.

Author: Guoshan Xu, Yong Ding, Jingfeng Xu, Yongsheng Chen, Yongsheng Chen, Bin Wu

3. DESCRIPTION OF SHAKING TABLE SYSTEM COMPONENTS

directional electro-hydraulic shaking table facility. The initial design concept consisted of a rigid platform sliding over a near frictionless linear bearing system and driven by an actuator attached to a reaction mass. Figure 3.1 illustrates the final design of the uni-directional electro-hydraulic shaking table.

Hydraulic Actuators and Shake Tables YouTube

Nov 28, 2012· TDG and IDATEK completed a number of successful servo hydraulic projects since year 2003. These solutions include single or multi axes servo-hydraulic actuators and shake tables. Recently high

作者: Derya Dinçer

NEES @ UC San Diego Shake Table Specifications

Jul 10, 2019· To determine the maximum force of 6.8 MN to be imparted by the shake table actuators and a maximum overturning moment of 50 MN-m to be accommodated by the platen and its support mechanism, many factors were considered. A suite of desired large or full-scale specimens for the shake table experiments was taken into account, as well as the assumed

STRUCTURE magazine Pioneering Shaking Table Continues to

The four vertical actuators which control pitch, roll and vertical displacement, are bolted between the foundation and the Shaking Table. The test structure is attached to the table by post-tensioning rods, inserted through a 3-foot by 3-foot matrix of 2-5/8-inch conduits, penetrating the Shaking Table surface.

ADVANCES IN SHAKE TABLE CONTROL AND SUBSTRUCTURE

ADVANCES IN SHAKE TABLE CONTROL AND SUBSTRUCTURE SHAKE TABLE TESTING by structure Techniques for Shaking Table Tests (grant no. CMMI- 0954958)". iv. Dedication 2.2 Block diagram of shake table system including hydraulic actuator, test

Linear Actuator with Speed and Stroke Control for Shaker

Jun 24, 2012· Hello all: I'm looking to build a shaker-table for gold mining on a budget. I know I need a linear actuator but I don't know what the one I'm looking for is called. The linear actuator needs to: -Move back and forth and have a way of controlling the length of stroke. -Have a speed control. The one I built was motor with an offset wheel and an arm attached to it.

Lineardynamicmodelingofauni-axialservo-hydraulicshaking

tion. The presence of a test structure on the shaking table modi"es the expression for S(s), H(s), and B(s), thus giving a modi"ed expression for the shaking table transfer function „(s). 2.1. Three-stage servovalve transfer function, H 5 (s) The functioning of a three-stage servovalve characterized by an &inner feedback control loop’ is

A shaking table substructure testing method for the

A novel shaking table substructure testing method that includes interaction forces determined by actuator forces and shaking table dynamic parameters is proposed and validated. The seismic performance of a storage tank that incorporates soil-structure interactions is investigated by the method proposed in this article.

Author: Guoshan Xu, Yong Ding, Jingfeng Xu, Yongsheng Chen, Yongsheng Chen, Bin Wu

3. DESCRIPTION OF SHAKING TABLE SYSTEM COMPONENTS

directional electro-hydraulic shaking table facility. The initial design concept consisted of a rigid platform sliding over a near frictionless linear bearing system and driven by an actuator attached to a reaction mass. Figure 3.1 illustrates the final design of the uni-directional electro-hydraulic shaking table.

Adaptive vibration control on electrohydraulic shaking

Oct 01, 2019· Electrohydraulic shaking table (EHST) system is a kind of heavy load electrohydraulic actuators (actuating systems),whose first-order natural frequency is very low, leading to a limited frequency bandwidth. As a consequence, to conduct the power level control based on an EHST system is a very challenging task.

Cited by: 5

NEES @ UC San Diego Shake Table Specifications

Jul 10, 2019· To determine the maximum force of 6.8 MN to be imparted by the shake table actuators and a maximum overturning moment of 50 MN-m to be accommodated by the platen and its support mechanism, many factors were considered. A suite of desired large or full-scale specimens for the shake table experiments was taken into account, as well as the assumed

An overview of control schemes for hydraulic shaking tables

Shaking table testing is a common experimental method in earthquake engineering for performance assessment of structures subjected to dynamic excitations. As most shaking tables

Cited by: 19

Shake Tables Structural Engineering and Earthquake

Synchronized table motions can be fully in-phase or uncorrelated. Adjacent to the shake tables, a large reaction wall equipped with dynamic actuators allows the application of computer-simulated forces on shake table-mounted substructures, thus simulating the reaction of the entire structure (Real-Time Dynamic Hybrid Testing, or RTDHT).

DYNAMIC ANALYSIS OF ELECTROHYDRAULIC SHAKING

(45,300 kg) shaking table because then the table weight is large enough relative to the foundation weight that some significant effects might be expected. 2.1 2,000 Ib Shaking Table A shaking table with one horizontal direction of motion only, driven by a single hydraulic actuator, and

Linear Actuator with Speed and Stroke Control for Shaker

Jun 24, 2012· Hello all: I'm looking to build a shaker-table for gold mining on a budget. I know I need a linear actuator but I don't know what the one I'm looking for is called. The linear actuator needs to: -Move back and forth and have a way of controlling the length of stroke. -Have a speed control. The one I built was motor with an offset wheel and an arm attached to it.

Shake Table Control Fidelity in Signal

Ideal Shaking Table vs. Reality Ideal shaking table: Reproduces commanded motion exactly Is characterized by a transfer function with unit gain and zero phase shift over its entire operating frequency range under loaded table condition. 1 1.5 )| Ideal Reality 0 5 10 15 20 25 0 0.5 Frequency[Hz] |H(Due to various peaks and valleys in the shaking

Lineardynamicmodelingofauni-axialservo-hydraulicshaking

tion. The presence of a test structure on the shaking table modi"es the expression for S(s), H(s), and B(s), thus giving a modi"ed expression for the shaking table transfer function „(s). 2.1. Three-stage servovalve transfer function, H 5 (s) The functioning of a three-stage servovalve characterized by an &inner feedback control loop’ is

Dynamics and Control of 6-DOF Shaking Table with Bell

This shaking table system has two types of hydraulic actuators. One is a straight actuator which is a general type. The other is a bell crank actuator which has a triangular bell crank structure. These two types of hydraulic actuators are shown in Fig. 2. Fig. 2 Two types of hydraulic actuators in the shaking table.

Novel actuators SERIES

Report on evaluation of novel actuation systems for shaking table, Pseudo-dynamic or field testing (.pdf, 4.31Mb) This report presents studies into novel forms of actuation technology, aimed at enhancing the responsiveness and controllability of actuators, particularly to

Control issues relating to real‐time substructuring

A transfer system, such as a hydraulic actuator or a shaking table, is used to impose the displacements at the interface between the two parts on the experimental substructure. The corresponding force imposed by the substructure on the transfer system is fed back to the numerical model. Control of the transfer system is critical to the accuracy

JP3123784B2 3D shaking table Google Patents

Reference numeral 10 denotes a three-dimensional shaking table for placing a model such as a product or a building structure on the shaking table 12 for testing. The three-dimensional shaking table 10 has an actuator 44 which is hydraulically operated in the X-axis direction via a ball joint 14a, a vibrating rod 16a and a ball joint 18a.