A computerized three-dimensional biomechanical static strength prediction model for studying stresses from manual materials handling operations

1984 ◽  
Vol 17 (11) ◽  
pp. 872
Author(s):  
Arun Garg ◽  
Don B. Chaffin
Keyword(s):  
Prediction Model ◽  
Three Dimensional ◽  
Static Strength ◽  
Strength Prediction ◽  
Materials Handling ◽  
Manual Materials Handling

Three Dimensional Measures of Trunk Motion Components during Manual Materials Handling in Industry

1989 ◽  
Vol 33 (11) ◽  
pp. 662-666 ◽  
Author(s):  
W.S. Marras ◽  
L.R. Sudhakar ◽  
S.A. Lavender
Keyword(s):  
Three Dimensional ◽  
Work Place ◽  
Trunk Motion ◽  
Materials Handling ◽  
Health History ◽  
Manual Materials Handling ◽  
Back Disorder ◽  
Spine Motion ◽  
Motion Characteristics ◽  
The Relationship

The objective of this study was to monitor and document the three dimensional spine motion components experienced during the performance of industrial work that is associated with various risks of low back disorder (LBD). An industrial study was performed that examined on-the-job trunk motions of 64 workers from 13 different industries. Trunk range of motion, velocity and acceleration were documented. Worker anthropometry, health history, external load moments, job satisfaction and risk (identified from OSHA 200 logs) were also recorded for the various jobs. The results identified and quantified those trunk motion characteristics as well as other workplace variables that were associated with high risk jobs. A regression model of job related LBD risk was also created based upon this information. The relationship between these motions and biomechanical loading of the spine as well as means to reduce the risk of LBD in the work place (based upon this study) are discussed.

Muscle Strength Simulations Using the Articulated Total Body Model

1986 ◽  
Vol 30 (1) ◽  
pp. 86-89 ◽  
Author(s):  
Andris Freivalds ◽  
Eui S. Jung ◽  
Randall Dick
Keyword(s):  
Three Dimensional ◽  
Biomechanical Model ◽  
Motor Units ◽  
State Function ◽  
Automobile Crashes ◽  
Materials Handling ◽  
Manual Materials Handling ◽  
Body Dynamics ◽  
Squat Lifting ◽  
Total Body

Further developments are presented on a dynamic three–dimensional strength model that may be useful for evaluating musculoskeletal stresses incurred during manual materials handling tasks. The model being developed is a modification of the Articulated Total Body (ATB) Model originally developed by Calspan Corp. for the study of human body dynamics during automobile crashes. Refinements were introduced by Freivalds and Kaleps (1984) to account for a human neuromusculature. Further refinements now include orderly recruitment patterns, differential motor units, active state function and fatigue. Simulations of squat lifting and level running were performed with the ATB Model. Both of these cases indicate the potential of a muscularized three–dimensional biomechanical model to simulate human responses in a variety of conditions.

Survey of One-handed Lifting in Manufacturing Industry: A Cross-sectional Study of the BackWorks Study Cohort

2020 ◽  
Vol 64 (1) ◽  
pp. 942-946
Author(s):  
Ruoliang Tang ◽  
Jay M. Kapellusch ◽  
Andrew S. Merryweather ◽  
Matthew S. Thiese ◽  
Kurt T. Hegmann ◽  
...  
Keyword(s):  
Manufacturing Industry ◽  
Cross Sectional Study ◽  
Study Cohort ◽  
The European Union ◽  
Sectional Study ◽  
Cross Sectional ◽  
Materials Handling ◽  
Manual Materials Handling ◽  
Lost Productivity ◽  
The One

Low back pain (LBP) is a common health problem and a major cause of lost productivity in workplaces. Manual materials handling (MMH) jobs have traditionally been regarded as risk factor for LBP. Compared to two-handed lifting, one-handed lifting has received little attention in both epidemiological and biomechanical research. In addition, one frequent complaint of the revised NIOSH lifting equation (RNLE) has been the lack of capability to directly evaluate one-handed lifting. Modifications have been proposed by the European Union, however their efficacy and influence have not yet been evaluated. This cross-sectional study provided objective survey of the MMH jobs, especially the one-handed lifting performed in manufacturing industry and investigated the outcomes of three proposed methods to address one-handed lifting using RNLE approach. Preliminary results suggest that workers with some one-handed lifting are associated with higher physical exposure. However, the increase was more significant among those who perform primarily one-handed lifting.

scholarly journals Research on Residual Strength Prediction Model of Corroded Pipeline Based on Improved PSO-BP

2021 ◽  
Vol 687 (1) ◽  
pp. 012007
Author(s):  
Li Tingke ◽  
Peng Yuanchun ◽  
Li Jiadi ◽  
Dulin ◽  
Lian Xingqin
Keyword(s):  
Prediction Model ◽  
Residual Strength ◽  
Strength Prediction ◽  
Improved Pso

scholarly journals Trunk Posture during Manual Materials Handling of Beer Kegs

2021 ◽  
Vol 18 (14) ◽  
pp. 7380
Author(s):  
Colleen Brents ◽  
Molly Hischke ◽  
Raoul Reiser ◽  
John Rosecrance
Keyword(s):  
Small Businesses ◽  
Inertial Measurement Unit ◽  
Measurement Unit ◽  
Low Back ◽  
Inertial Measurement ◽  
Materials Handling ◽  
Kinematic Measurement ◽  
Manual Materials Handling ◽  
Trunk Posture ◽  
Data Design

Craft brewing is a rapidly growing industry in the U.S. Most craft breweries are small businesses with few resources for robotic or other mechanical-assisted equipment, requiring work to be performed manually by employees. Craft brewery workers frequently handle stainless steel half-barrel kegs, which weigh between 13.5 kg (29.7 lbs.) empty and 72.8 kg (161.5 lbs.) full. Moving kegs may be associated with low back pain and even injury. In the present study, researchers performed a quantitative assessment of trunk postures using an inertial measurement unit (IMU)-based kinematic measurement system while workers lifted kegs at a craft brewery. Results of this field-based study indicated that during keg handling, craft brewery workers exhibited awkward and non-neutral trunk postures. Based on the results of the posture data, design recommendations were identified to reduce the hazardous exposure for musculoskeletal disorders among craft brewery workers.

Optimization of the Navy’s three-dimensional mine impact burial prediction simulation model, Impact35, using high-order numerical methods

2021 ◽  
pp. 154851292110286
Author(s):  
Athanasios Donas ◽  
Ioannis Famelis ◽  
Peter C Chu ◽  
George Galanis
Keyword(s):  
Numerical Analysis ◽  
Numerical Methods ◽  
Prediction Model ◽  
Simulation Model ◽  
Three Dimensional ◽  
Simulation System ◽  
High Order ◽  
Alternative Methodology ◽  
Runge Kutta ◽  
Fifth Order

The aim of this paper is to present an application of high-order numerical analysis methods to a simulation system that models the movement of a cylindrical-shaped object (mine, projectile, etc.) in a marine environment and in general in fluids with important applications in Naval operations. More specifically, an alternative methodology is proposed for the dynamics of the Navy’s three-dimensional mine impact burial prediction model, Impact35/vortex, based on the Dormand–Prince Runge–Kutta fifth-order and the singly diagonally implicit Runge–Kutta fifth-order methods. The main aim is to improve the time efficiency of the system, while keeping the deviation levels of the final results, derived from the standard and the proposed methodology, low.

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