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About 10,000 papers for “Moving load”

Heavy-Load Moving Systems

Harold Chambers · Marine Technology and SNAME News · 1976

Over the years, a number of unique load-moving systems have been developed in response to needs in heavy fabrication programs. The systems are designed principally to improve construction techniques in a new or expanding fabrication facility. All systems are focused on low capital investment, making them particularly adaptable to short-term projects and projects planned in relatively nonindustrialized areas. This paper describes three mechanical heavy-load-moving methods and explains how they are applied to modernize the methods of constructing ships and offshore structures. In today's business climate, "to modernize" means to minimize capital investment in a new construction facility and, also, to minimize the ongoing labor costs. It further means to provide maximum flexibility to the facility for future building programs, which cannot clearly be anticipated in the rapidly changing global market for ships and offshore oil structures.

Cited by 3

Load distribution in moving furniture

P. Xiong-Skiba · American Journal of Physics · 1996

Static equilibrium conditions are applied to the case of moving a piece of furniture. Assume that two people are carrying a piece of furniture down a hill with a uniform speed. The load distribution on both people is found to be a function of the slope of the hill, the difference in the heights of the two people, the length of the furniture, and, more importantly, the force angle that the person at the upper end applied relative to a horizontal line. Some interesting features are revealed through this analysis. For example, contradictory to our common sense, the person at the lower end does not always carry more ‘‘weight.’’ This problem was found to be effective in helping students develop the static equilibrium concept.

Cited by 0Open access

Moment Determination for Moving Load Systems

Marius B. Wechsler · Journal of Structural Engineering · 1985

An accurate method is described for the determination of the curves of maximum moments for beams loaded with moving loads. This method avoids errors in the range of 15 percent produced by the commonly used approximation techniques. It applies to simple beams and to beams overhanging their supports. The basic idea of the method is to replace each of the moving load systems by a virtual system of stationary loads. The moments and the reactions produced by this virtual system are equal to the maximum moments and to the maximum reactions respectively produced by the actual moving system of loads. Examples of the application of the theory are given for some simple loading conditions.

Cited by 0

Moving Load on a Laminated Composite

C. Sve, G. Herrmann · Journal of Applied Mechanics · 1974

A solution is presented for the dynamic response of a periodically laminated half plane that consists of alternating layers of two different materials and is subjected to a moving load. The laminations are parallel to the surface of the half plane, and the velocity of the load is steady and supersonic. An effective stiffness theory developed by Sun, Achenbach, and Herrmann is used to model the layered material, and the formal solution is obtained with the aid of Laplace transforms. A far-field solution is constructed with the head-of-the-pulse procedure, and several numerical examples are presented.

Cited by 11

Two span bridge under moving load

Daniela Kuchárová, Jozef Melcer · Vibroengineering PROCEDIA · 2019

The dynamic effect of the moving load on the bridge construction is the subject of the solution in this article. The bridge is modeled as two span continuous beam with two degrees of freedom. The assumption describing the dynamic deflection curve and the assumption describing the load distribution on individual lumped masses are adopted at the creation of bridge computational model. The plane computational model of heavy vehicle with five degrees of freedom is adopted. The problem is described by ordinary differential equations which are solved numerically by using MATLAB. The results are presented by graphical and numerical form.

Cited by 2Open access

Train-induced vibrations: moving load modelling

Petronijević, Mira, Brčić, Stanko, Nefovska-Danilović, Marija · GraFar (University of Belgrade, Faculty of Civil Engineering) · 2009

In this paper numerical modeling of train induced vibration is presented. The wheel force is modeled with assumption that only static component with constant load shape and constant velocity exists. The dynamic and inertial part of loading is neglected. The dynamic response, caused by the calculated moving forces of train “Beovoz”, in the selected points of existing structures at railway station “Belgrade-Center” in Prokop are obtained using the Finite element analysis in the Frequency domain and the Thin layer method. Some of the results are presented.

Cited by 0

Beam High Reliability for Moving Load

L. M. Raber · 2012

The article contains the results of the development of new structural forms of beams with connections to the elements of high-strength bolts. Recommendations for the production of new beams, taking into account the features of compounds and technologies for their implementation.

Cited by 0

Moving load on a Timoshenko beam

Seroj Mackertich · The Journal of the Acoustical Society of America · 1990

This paper presents the dynamic response of a simply supported beam excited by moving loads based on the Timoshenko beam theory with corrections for the shear-deformation and rotatory inertia effects. Numerical results for various velocities of moving loads are given, and results are compared with the response of a Bernoulli-Euler beam theory.

Cited by 1Open access

Moving point load approximation for BWIM

D. Cantero · Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability · 2022

This paper introduces the Point Load Approximation (PLA) idea that is useful for the analysis of bridge response signals arising during vehicle passages. The PLA is an approximation of the vehicle loading on a bridge that can be obtained combining several bridge response signals by means of a finite difference scheme. The idea can be applied to any bridge load effect and their time derivatives. These findings are particularly relevant for Bridge Weigh-in-Motion (BWIM) because, in theory, it allows for the explicit definition of an influence line, which is independent of the bridge’s structural configuration. First, this paper clearly presents the PLA idea, exploring its derivation, demonstrating its theoretical validity, and elaborating on its significance to provide a more insightful framework for the interpretation of bridge signals during vehicle crossing events. Secondly, the PLA idea has then been applied to BWIM technology, enabling the definition of PLA-based BWIM systems. It is shown that the BWIM algorithms can be easily extended to a broader set of measured load effects. Two particular scenarios have been numerically investigated using a 2D vehicle-bridge interaction model of 5-axle trucks traversing a finite element beam. Monte Carlo simulations have been performed to introduce the inherent problem variabilities. The first study explored BWIM systems that utilize multiple strain gauges along the bridge length. The results show that the use of PLA might lead to consistently more accurate individual axle weight estimates, when compared to the standard one-strain sensor BWIM. The second study investigated an alternative way of establishing acceleration-based BWIM by taking advantage of the PLA concept. The results showe reasonably good average GVW estimates.

Cited by 0

Fully saturated poroelastic beam Moving load

Keivan Kiani A, Hamidreza Ghomi Avili B, Ardeshir Noori Kojorian C et al. · 2015

the role of shear deformation in dynamic behavior of a fully saturated poroelastic beam traversed by a moving load

Cited by 0

Moving Load Effect on Concrete Slab

Daniela Kuchárová, Gabriela Lajčáková · Procedia Engineering · 2017

The concrete slabs are often used during the building of temporary or permanent road structures. This structure is in contact with elastic foundation and it is subjected to moving load dynamic effect. It has often character of isolated prefabricated slab at the temporary structures. The submitted paper analyses the dynamic effect of moving load on such structure by numerical way. The computing model of vehicle, computing model of the slab and the method of numerical solution are introduced. The dynamic response of the structure is declared in time domain by graphical and numerical way.

Cited by 6Open access

Load force components on moving object.

Anvesh Naik (16679137), Satyajit Ambike (13911418) · Figshare · 2025

<div> When hammering a nail, why do right-handers wield the hammer in the right hand? The complementary dominance theory suggests a somewhat surprising answer. The two hands are specialized for different types of tasks: the dominant for manipulating objects, and the non-dominant for stabilizing objects. Right-handers wield the moving object with their right hand to leverage the skills of both hands. Functional specialization in hand use is often illustrated using examples of object manipulation. However, the complementary dominance theory is supported by wrist kinematics rather than object manipulation data. Therefore, our goal was to determine whether this theory extends to object manipulation. We hypothesized that hand-specific differences will be evident in the kinematics of hand-held objects and in the control of grip forces in right-handed individuals. Right-handed participants held two instrumented objects that were coupled by a spring. They moved one object while stabilizing the other object in various bimanual tasks. They performed motions of varying difficulty by tracking predictable or unpredictable targets. The two hands switched roles (stabilization vs movement) in various experimental blocks. The changing spring length perturbed both objects. We quantified the movement performance by measuring the objects’ positions, and grip force control by measuring grip-load coupling in the moving hand and mean grip force in the stabilizing hand. The right hand produced more accurate object movement, along with stronger grip-load coupling, indicating superior predictive control of the right hand. In contrast, the left hand stabilized the object better and exerted a higher grip force, indicating superior impedance control of the left hand. Task difficulty had a weak effect on grip-load coupling during object movement and no effect on mean grip force during object stabilization. These behavioral results demonstrate that complementary dominance extends to object manipulation, though the weak effect of task difficulty on grip characteristics warrants further investigation. Neurophysiological investigations can now examine the hemisphere-specific neural mechanisms underlying these behavioral differences. </div>

Cited by 0Open access