Nonlinear Dynamic Behaviour of Pile Foundations in Horizontal Vibration

Horizontal vibration tests are performed on reinforced concrete single pile (L/d = 20) and group piles (L/d = 20 and s/d = 2, 3, 4) under varying levels of harmonic excitation acting above the center of gravity of the pile cap-loading system. The observed response curves display marked nonlinearity as the natural frequencies decreases with increasing intensity of excitation …

Modeling and Robust Control of Horizontal Vibrations for …

Modeling and robust controller design of horizontal vibrations for high-speed elevators are presented in this paper. Based on the theory of rigid body dynamics, the model of the horizontal vibrations about the elevator cage is developed. The motion of the elevator cage is resolved into translation and rotation round the mass center of the cage. Taking account of …

Horizontal vibration suppression method suitable for …

Horizontal vibrations of elevator cars mainly occur because a car swings as roller guides installed at corners of a car frame move on a winding guide rail at high speeds. Rider comfort in high-speed elevators is worsened by these vibrations. Conventional active dampers suppressing horizontal vibrations using ac servomotors make cars heavier so driving power …

Active Control Strategy of High-Speed Elevator Horizontal Vibration

Horizontal vibration dynamic model of elevator car with active control. Based on the horizontal vibration model of high-speed elevator established in the references (Zhang et al., 2018; Zhang et ...

Dynamic Behavior of an Embedded Foundation under Horizontal Vibration …

More and more huge embedded foundations are used in large-span bridges, such as caisson foundations and anchorage open caisson foundations. Most of the embedded foundations are undergoing horizontal vibration forces, that is, wind and wave forces or other types of dynamic forces. The embedded foundations are regarded as rigid due to its high stiffness and small …

Simulation and Analysis of Material Horizontal Vibration …

For the horizontal vibration conveyor, the system dynamics is analyzed. Taking into account the effect of the properties of materials and interaction force between the particles on the conveying velocity of materials, introduces the general principle of DEM and the motion of particles in horizontal vibration conveyor is macro simulated and numerical simulated. The …

Horizontal vibration behavior of a rigid disk resting on a …

DOI: 10.1016/jpgeo.2023.105488 Corpus ID: 258543590; Horizontal vibration behavior of a rigid disk resting on a viscoelastic soil layer overlying rigid bedrock @article{Yang2023HorizontalVB, title={Horizontal vibration behavior of a rigid disk resting on a viscoelastic soil layer overlying rigid bedrock}, author={Zijiang Yang and Xinjun Zou}, …

Turbulent vertical convection under vertical vibration

In many practical cases, additional driving forces or agents may exist in addition to buoyancy. Typical examples are the shear effect induced by the mean wind, 35 the Coulomb force when the fluid is dielectric in the presence of electric field, 36,37 the Coriolis force when one deals with the convection in rotating reference frame, 38 or the magnetic force when …

Horizontal Vibration of Pile in Transversely Isotropic …

In order to consider the influence of liquid phase and soil anisotropy, the soil around the pile is considered a transversely isotropic saturated porous medium, and a horizontal dynamic model of transversely isotropic saturated soil-pile is established. Based on Beor's saturated porous medium theory and the constitutive equation of transversely isotropic media, …

Vibration compaction of compressible filter cakes for …

Moreover, Yildiz et al. [45] transferred the method to a horizontal vacuum belt filter using a developed vibration module, which could significantly improve mechanical deliquoring of precipitated ...

Introduction guide to vibration monitoring

An Acceleration Feedback-Based Active Control Method for …

Purpose Due to the influence of uneven guide rail, rope swing and unbalanced shaft wind pressure, the high-speed elevator car may experience violent horizontal vibration, which seriously affects the comfort and safety of elevator passengers. Hence, it is vital to suppress horizontal vibration for high-speed elevator car (HSEC). Methods This paper …

Soil-pile interaction in horizontal vibration

Interaction between soil and an elastic pile vibrating horizontally is theoretically examined. The soil is modelled as a linear, viscoelastic layer overlying rigid bedrock. The pile is assumed to be vertical and point bearing. This study utilizes the definition of soil resistance presented in a preceding paper.1 A direct solution is developed which yields closed form formulas for pile ...

Analytical Solution to Horizontal Vibrations of Large …

DOI: 10.1061/ijgnai.gmeng-8882 Corpus ID: 268008031; Analytical Solution to Horizontal Vibrations of Large-Diameter Piles in Layered Pasternak Soils @article{Cui2024AnalyticalST, title={Analytical Solution to Horizontal Vibrations of Large-Diameter Piles in Layered Pasternak Soils}, author={Chunyi Cui and Yu Xin and Chengshun …

Analytical solution for horizontal vibration of partially …

Based on Biot's dynamic wave theory and Novak's plane strain model (PSM), an analytical model for the horizontal vibration of a partially embedded pipe pile group (PEPPG) in layered saturated soil (LSS) that considers the soil-plugging effect was established: First, the frequency-domain analytical expressions of the saturated surrounding soil (SSS) and soil plug …

Measurement of vertical and horizontal vibrations of a …

Two-dimensional (vertical and horizontal) vibrations of a wedge-type probe upon food rupture was evaluated separately using two accelerometers placed perpendicular to a guide rod of a swing-arm ...

Vibration Diagnostic Guide

Vibration compaction of compressible filter cakes for …

For this purpose, a modular device was developed for vibration compaction on an indexing horizontal vacuum belt filter (HVBF). It is shown that vibration compaction of an industrially relevant material on the HVBF reduces the initial residual moisture of 39.9% after cake formation by up to 10.5 percent points. Significant mechanical deliquoring ...

The Physics Classroom Website

Those components which are perpendicular to the molecules emerge from the filter. Thus, the transmission axis is aligned perpendicular to the molecules of the filter. One-half of the original vibrations emerge from the filter. The emerging vibrations are aligned in a direction perpendicular to the molecules and parallel to the transmission axis.

Measurement of vertical and horizontal vibrations of a …

Two-dimensional (vertical and horizontal) vibrations of a wedge-type probe upon food rupture were evaluated separately using two accelerometers placed perpendicular to a guide rod of a swing-arm device for texture evaluation of the flesh of three varieties of apples and three types of potato chips. …

Research on anti‐saturation horizontal vibration model and …

A neural network adaptive integral terminal sliding mode control method with input saturation is proposed for the horizontal vibration problem of high-speed elevator car …

Reporting Guidelines for Whole-Body Vibration Studies in Humans

The two principal types of vibration transmissions are vertical vibration transmission and side-alternating or tilting vibration transmission (Figure 1). During WBV, subjects can perform dynamic exercises on the platform (e.g., doing back squats) or take a static posture like standing upright, sitting, or lying down.

Effect of Horizontal Vibrations and Particle Size on the …

Abstract. Particle packing densification due to vibrations is a common process that occurs in many industrial applications and is beneficial for achieving better mechanical properties in powder metallurgy. However, most of the research up to this point was focused on vibration compaction of uniform-sized or binary particle mixtures, while most actual commercial …

Coupled Vertical–Horizontal Vibration

Semantic Scholar extracted view of "Coupled Vertical–Horizontal Vibration Characteristics of a Cold Rolling Mill Based on an Optimized Karman Differential Equation" by Q. Wang et al. ... More Filters. Filters. Vibration of an axially moving string with nonclassical boundary conditions subjected to harmonic excitation based on the method of ...

An Optimized Fractional-Order PID Horizontal …

Due to factors such as uneven guide rails and airflow disturbance in the hoistway, high-speed elevators may experience significant vibrations during operation. This paper proposes an optimized fractional-order PID (FOPID) …

Vibration compaction of compressible filter cakes for …

For this purpose, a modular device was developed for vibration compaction on an indexing horizontal vacuum belt filter (HVBF). It is shown that vibration compaction of an industrially relevant material on the HVBF reduces the initial residual moisture of 39.9% after cake formation by up to 10.5 percent points.

Investigation on vibration characteristics induced by …

However, under high liquid velocity condition, the influence of flow pattern on the gas–liquid two-phase flow-induced vibration (GTFIV) of the pipe remains unclear. In this paper, the vibration signals in the horizontal pipe under different flow patterns at high liquid velocity are measured by a vibration test system.

Direct Measurements of Vortex-Induced Vibrations on a Horizontal …

Abstract. This work presents experimental results on vortex-induced vibration (VIV) of a horizontal cylinder with 2.69 m in length, 21 mm in diameter, and a mass ratio equal to 3.9. The experiments were carried out in a towing tank, where the flexible cylinder was towed under constant current profiles. Twenty reduced velocities were tested in a range of 1.75 < Vr < …

The Horizontal Plate Filter as a Torsional Vibration System …

Filter cake is removed from the plates of a horizontal plate filter by means of torsional vibrations of the plates. For good vibration isolation from the surrounding objects the application of a …

S-2000A Pneumatic Vibration Isolators with …

11 rowsS-2000 Pneumatic Vibration Isolator Sets. Our isolator sets include the individual isolators and accessories as well as a 3 leveling valve kit, pressure gauge, height adjustment wrench, 1/4 NPT male connector, and S-2000 users …