Utilization of Coupled Simulation in the Fatigue Loads Prediction of a Hydraulically Driven Log Crane

2001 ◽  
Author(s):  
Aki M. Mikkola
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
Fatigue Damage ◽  
Hydraulic System ◽  
Software Environment ◽  
Welded Structures ◽  
Mechanism Model ◽  
Detailed Simulation ◽  
Flexible Mechanism ◽  
Fatigue Loads

Abstract Welded structures, such as hydraulically driven booms, are disposed to fatigue damage. Design against fatigue requires information on the fatigue resistance of a structure’s critical details and the fatigue loads that act on each detail. The present paper introduces a method based on dynamic simulation for determining the fatigue loads in a hydraulically driven log crane. The detailed simulation model was built up in the MBS-software environment in which the flexible mechanism model and the equations describing the hydraulic system were combined. The complete simulation model was verified by comparing measurements to numerical results. This comparison shows that there is a clear correspondence between the simulated and measured results. It was thus shown that it is possible to create a simulation model which can be used realistically for determining stresses in fatigue analysis. The model was employed in the study of the fatigue loads, which are formed when the crane is being loaded.

Using the Simulation Model for Identification of the Fatigue Parameters of Hydraulically Driven Log Crane

1999 ◽  
Vol 123 (1) ◽  
pp. 125-131
Author(s):  
A. Mikkola
Keyword(s):  
Simulation Model ◽  
Hydraulic System ◽  
Life Prediction ◽  
Mechanical Analysis ◽  
Fatigue Life Prediction ◽  
Analysis Software ◽  
Software Environment ◽  
Mechanism Model ◽  
Detailed Simulation ◽  
Flexible Mechanism

The present paper introduces a method based on dynamic simulation for determining the fatigue parameters in a hydraulically driven log crane. The parameters that describe the nature of fatigue loads can be applied in order to facilitate designer work in fatigue life prediction. The detailed simulation model was built up in the ADAMS mechanical analysis software environment in which the flexible mechanism model and the equations describing the hydraulic system were combined. The complete simulation model was verified by comparing measurements to numerical results. This comparison shows that there is a clear correspondence between the simulated and measured results. The model was employed in the study of the fatigue parameters, which are formed when the crane is being loaded.

Dynamic Simulation on Shock Excitation Hydraulic System with Rotary Valve Based on AMEsim

2012 ◽  
Vol 232 ◽  
pp. 508-511
Author(s):  
Hui Wang ◽  
Zong Yue Deng
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
Hydraulic System ◽  
Rotary Valve ◽  
Shock Excitation ◽  
Modeling Software ◽  
Working Principle

Introduce structure and working principle of shock excitation hydraulic system in VSR equipments, establish its simulation model with advanced modeling software .Through dynamic simulation get simulation curves under different conditions, and analyses some important parameters’ influents on the system, and provide the basis for testing and improving the system.

Influence of Crank Radius on the Curve Shapes for a Multi-Link High-Speed Precision Press

2011 ◽  
Vol 141 ◽  
pp. 313-318 ◽  
Author(s):  
Xin Jian Lu ◽  
Si Hong Zhu ◽  
Zun Mang Ke ◽  
Jian Qin ◽  
Shao Wei
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
High Speed ◽  
Lateral Force ◽  
Inertial Forces ◽  
Software Environment ◽  
Bottom Dead Center ◽  
The Press ◽  
Adams Software ◽  
Dynamic Simulation Model

The parameterized dynamic simulation model for a multi-link high precision press has been established in the ADAMS software environment based on the displacement equations. The press being developed is taken as an example to study the slider’s displacement curves, velocity curves and acceleration curves under different crank radius in practice as well as the working angle curves and torque curves. With the crank radius increasing, the started punching angle comes early and the slider’s velocity and acceleration at bottom dead center (B.D.C) decreases significantly which help to improve the accuracy of B.D.C and to lower the torque consumption during stamping. Meanwhile, the increasing of working angle helps to reduce the lateral force acting on the slider, such as the torque required to overcome the inertial forces increases rapidly, the torque needed to overcome the nominal force decreases and the peak of nominal force shifts to the lower left gradually. Results of the research mentioned above are helpful to develop the multi-link high-speed press.

Coupling Simulation and Characteristic Analysis of Pure Water High-Speed On-Off Valve

2013 ◽  
Vol 328 ◽  
pp. 457-462
Author(s):  
Ling Yun Yan ◽  
Peng Fei Wu ◽  
Zeng Xian Bao
Keyword(s):  
Mathematical Model ◽  
Simulation Model ◽  
Dynamic Simulation ◽  
Hydraulic System ◽  
High Speed ◽  
Pure Water ◽  
Performance Parameters ◽  
Characteristic Analysis ◽  
Simulation Results ◽  
The Mathematical Model

The paper introduces the structure and operating principle of two-position three-way pure water high-speed solenoid on-off valve, establishes the mathematical model of on-off valve, obtains performance parameters of electromagnet through Ansoft simulation, imports the performance parameters of electromagnet into the solenoid on-off valve simulation model in AMESim, and realizes the coupling simulation among electromagnetic circuit, mechanical part and hydraulic system, so as to improve simulation precision and achieve relatively correct static-dynamic simulation results of high-speed solenoid on-off valve.

scholarly journals Study on improving three-dimensional dynamic simulation model and equation of flexible fabric

2019 ◽  
Vol 11 (6) ◽  
pp. 168781401985284
Author(s):  
Meiliang Wang ◽  
Mingjun Wang ◽  
Xiaobo Li
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
Material Properties ◽  
Three Dimensional ◽  
Equation Solving ◽  
Study Results ◽  
Essential Properties ◽  
Dynamic Simulation Model ◽  
Novel Model ◽  
Simulation Equation

The use of the traditional fabric simulation model evidently shows that it cannot accurately reflect the material properties of the real fabric. This is against the background that the simulation result is artificial or an imitation, which leads to a low simulation equation. In order to solve such problems from occurring, there is need for a novel model that is designed to enhance the essential properties required for a flexible fabric, the simulation effect of the fabric, and the efficiency of simulation equation solving. Therefore, the improvement study results will offer a meaningful and practical understanding within the field of garment automation design, three-dimensional animation, virtual fitting to mention but a few.

A Mathematical Model Including Mechanical Structure, Hydraulic and Control of LHDS

Robotica ◽  
2021 ◽  
pp. 1-16
Author(s):  
Guoliang Ma ◽  
Kaixian Ba ◽  
Zhiwu Han ◽  
Zhengguo Jin ◽  
Bin Yu ◽  
...  
Keyword(s):  
Simulation Model ◽  
Hydraulic System ◽  
Inverse Dynamics ◽  
Hydraulic Drive ◽  
Operation Time ◽  
Variable Load ◽  
Mechanical Structure ◽  
Load Characteristics ◽  
Common Problems ◽  
And Control

SUMMARY In this paper, mathematical models of kinematics, statics and inverse dynamics are derived firstly according to the mechanical structure of leg hydraulic drive system (LHDS). Then, all the above models are integrated with MATLAB/Simulink to build the LHDS simulation model, the model not only considers influence of leg dynamic characteristics on hydraulic system but also takes into account nonlinearity, variable load characteristics and other common problems brought by hydraulic system, and solves compatibility and operation time which brought by using multiple software simultaneously. The experimental results show the simulation model built in this paper can accurately express characteristics of the system.

Organizational and quality systems development: An analysis via a dynamic simulation model

2000 ◽  
Vol 11 (4-6) ◽  
pp. 410-416 ◽  
Author(s):  
Andreas Bauer ◽  
Gerald Reiner ◽  
Rudolf Schamschule
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
Systems Development ◽  
Quality Systems ◽  
Dynamic Simulation Model
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