scholarly journals Dynamic Modeling and Analysis of the Telescopic Sleeve Antiswing Device for Shipboard Cranes

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Jianli Wang ◽  
Shenghai Wang ◽  
Haiquan Chen ◽  
Anqi Niu ◽  
Guoliang Jin
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Model ◽  
Dynamic Modeling ◽  
Dynamic Characteristics ◽  
Structural Design ◽  
Three Dimensional ◽  
Modeling And Analysis ◽  
Research Results ◽  
Simulation Results ◽  
Reduction Characteristics

In order to explore the dynamic characteristics of the telescopic sleeve antiswing device for shipboard cranes under coupling excitation, a three-dimensional dynamic model of the ship crane telescopic sleeve antiswing device is established in this study, and the accuracy of the model is verified through experiments. By dynamic analysis, the influence of sleeve extension and contraction, damper parameters, and ship excitation on the payload swing is found; meanwhile, the influence of payload swing on ship stability is discovered. At the same time, the simulation results show that the three-dimensional dynamic model can accurately simulate the swing reduction characteristics of the antiswing device. The in-plane and out-plane angles of the swing are reduced by 70% and 90%. The research results have great significance to further explore the antiswing mechanism and structural design of the mechanical antiswing device.

Dynamic Modeling and Simulating Analysis of Submersible Buoy System

2013 ◽  
Vol 475-476 ◽  
pp. 1391-1396 ◽  
Author(s):  
Zhan Feng Qi ◽  
Li Juan Jia ◽  
Yu Feng Qin ◽  
Sen Zhang ◽  
Xiu Jun Sun
Keyword(s):  
Dynamic Analysis ◽  
Numerical Computation ◽  
Dynamic Model ◽  
Dynamic Modeling ◽  
Marine Environment ◽  
Structural Design ◽  
Lumped Mass ◽  
Simulating Analysis

The submersible buoy system is an important tool in the profile observation of marine environment. According to the lumped mass based method, the dynamic modeling of the submersible buoy system is established, then the dynamic analysis is carried out. The dynamic model is solved and analyzed by using the software MATLAB. The result provides theoretical reference for its structural design and numerical computation of the submersible buoy system.

Formulation of Multiple Belt System and its Dynamic Analysis

1993 ◽  
Author(s):  
Takuzo Iwatsubo ◽  
Shiro Arii ◽  
Kei Hasegawa ◽  
Koki Shiohata
Keyword(s):  
Computer Program ◽  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Equations Of Motion ◽  
Linear Equations ◽  
Transient Responses ◽  
Fundamental Idea ◽  
Linear Equations Of Motion ◽  
Simulation Results ◽  
Belt System

Abstract This paper presents a method for analyzing the dynamic characteristics of driving systems consisting of multiple belts and pulleys. First, the algorithm which derives the linear equations of motion of arbitrary multi-coupled belt systems is shown. Secondly, by using the algorithm, the computer program which formulates the equations of motion and calculates the transient responses of the belt system is presented. The fundamental idea of the algorithm is as follows: Complicated belt systems consisting of multiple belts and pulleys are regarded as combinations of simple belt systems consisting of a single belt and some pulleys. Therefore, the equations of motion of the belt systems can be derived by the superposition of the equations of motion of the simple belt systems. By means of this method, the responses of arbitrary multi-coupled belt systems can be calculated. Finally, to verify the usefulness of this method, the simulation results are compared with the experimental results.

Dynamic Modeling of a Multi-Legged Robotic Vehicle: Part 2 — Dynamic Analysis

1987 ◽  
Author(s):  
R. A. Hart ◽  
N. D. Ebrahimi
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Model ◽  
Dynamic Modeling ◽  
Kinetic Equations ◽  
Euler Method ◽  
Degree Of Freedom ◽  
Time Response ◽  
Robotic Vehicle

Abstract In Part 1 of this report, we described the overall objective of the investigation; that is, the formulation of a dynamic model for determining the time response of a multi-legged robotic vehicle traveling on a variable-topographic terrain. Specifically, we developed expressions for the joint variables, and their rates, which are essential for describing the system’s links orientations, velocities, and accelerations. This procedure enabled us to determine the kinematic quantities associated with the entire vehicular system in accordance with the Newton-Euler method. In the present paper, we formulate the kinetic equations for the multi-degree-of-freedom leg assemblies, the rigid wheels, and the platform of the vehicle to achieve the prescribed motion and corresponding configuration of the system.

scholarly journals Dynamic analysis of material motion using MATLAB/Simulation environment and test verification

2020 ◽  
Vol 12 (9) ◽  
pp. 168781402095780
Author(s):  
Mei Fang ◽  
Zhihong Yu ◽  
Wenjie Zhang
Keyword(s):  
Dynamic Analysis ◽  
Structural Design ◽  
Simulation Analysis ◽  
Model Simulation ◽  
Maximum Relative Error ◽  
Matlab Simulation ◽  
Simulation Results ◽  
Low Efficiency ◽  
Test Verification ◽  
The Mathematical Model

Throwing device is an important factor that directly affects the performance of chaff cutter. In this work, the dynamic analysis linked with the problem of low efficiency and residue blockage of disc knife chaff cutter is executed. Based on this perspective, the mathematical model, simulation, and testing of the material movement have been carried out. Simulations are performed in MATLAB/Simulink environment. An anemometer records the airflow velocity, which provides data for simulation analysis. The simulation results showed that during the movement along the blade, the material first performs deceleration and then accelerates; in other stages, only deceleration. And finally calculated the throwing distance. To support the presented simulations, an experimental study is conducted. The experimental results are compared with simulation results, the maximum relative error between the simulated value and the experimental value is 9.42%, which verified the correctness of the model. This research provides a theoretical basis for the structural design, parameter optimization, and matching of the chaff cutter.

Pseudo-rigid-body dynamic modeling and analysis of compliant mechanisms

2017 ◽  
Vol 232 (9) ◽  
pp. 1665-1678 ◽  
Author(s):  
Yue-Qing Yu ◽  
Qian Li ◽  
Qi-Ping Xu
Keyword(s):  
Rigid Body ◽  
Dynamic Model ◽  
Dynamic Modeling ◽  
Dynamic Models ◽  
Compliant Mechanisms ◽  
Lagrange Equation ◽  
Dynamic Responses ◽  
Modeling And Analysis ◽  
Rigid Body Dynamic ◽  
Body Dynamic

An intensive study on the dynamic modeling and analysis of compliant mechanisms is presented in this paper based on the pseudo-rigid-body model. The pseudo-rigid-body dynamic model with single degree-of-freedom is proposed at first and the dynamic equation of the 1R pseudo-rigid-body dynamic model for a flexural beam is presented briefly. The pseudo-rigid-body dynamic models with multi-degrees-of-freedom are then derived in detail. The dynamic equations of the 2R pseudo-rigid-body dynamic model and 3R pseudo-rigid-body dynamic model for the flexural beams are obtained using Lagrange equation. Numerical investigations on the natural frequencies and dynamic responses of the three pseudo-rigid-body dynamic models are made. The effectiveness and superiority of the pseudo-rigid-body dynamic model has been shown by comparing with the finite element analysis method. An example of a compliant parallel-guiding mechanism is presented to investigate the dynamic behavior of the mechanism using the 2R pseudo-rigid-body dynamic model.

Dynamic Modeling and Simulation of Short-Duration Over-excitation Phenomenon in Hysteresis Motor

2017 ◽  
Vol 8 (2) ◽  
pp. 623
Author(s):  
Sayyed Hossein Edjtahed ◽  
Amir Hossein Pir Zadeh ◽  
Abolfazl Halavaei Niasar
Keyword(s):  
Dynamic Model ◽  
Short Duration ◽  
Dynamic Modeling ◽  
High Speed ◽  
Nonlinear Behavior ◽  
Permanent Magnet Synchronous Motors ◽  
Small Power ◽  
Modeling And Analysis ◽  
Synchronous Motors ◽  
Terminal Voltage

The hysteresis motor is a well-known synchronous motor that is used in special small power, high speed applications. Dynamic modeling and analysis of this motor is more complicated than permanent magnet synchronous motors (PMSMs) or induction motors (IMs) due to nonlinear behavior of rotor magnetic material. Short over-excitation is a unique phenomenon that only occurs in hysteresis motor in which the terminal voltage increase at synchronous speed for a short duration, and then continuously is decrease to initial value. Therefore, the input current is reduced, this leads to more power factor and efficiency enhancement. Till now, there isn’t any analytic dynamic model of this phenomenon. In this paper, based on a novel dynamic model of hysteresis motor, the over-excitation phenomenon is investigated and transient performance of the motor during over-excitation is simulated via Simulink.

Dynamic Analysis and Experiment Research of the Two-Mass Feeder

2012 ◽  
Vol 488-489 ◽  
pp. 1823-1828
Author(s):  
Zhan Jiang Li ◽  
Fei Chen
Keyword(s):  
Experimental Data ◽  
Theoretical Analysis ◽  
Dynamic Analysis ◽  
Dynamic Model ◽  
Structural Design ◽  
Scientific Basis ◽  
Experiment Research

In this paper, we make a theoretical analysis for the two-mass feeder. The dynamic model of the two-mass feeder is established. According to the analysis of vibration equations, the reasons that lead to forward and backward swing of the feeder are found. We collect a large number of experimental data in order to verify the correctness of the theoretical analysis, and give the corresponding improvements. The results provide a strong scientific basis for the examiner and the improvement of structural design, making the design become more rational.

Dynamic Modeling and Optimal Design of a 2R Compliant Mechanism

2017 ◽  
Author(s):  
Wenshuo Ma ◽  
Yan Xie ◽  
Jingjun Yu ◽  
Xu Pei
Keyword(s):  
Optimal Design ◽  
Dynamic Model ◽  
Dynamic Modeling ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Compliant Mechanisms ◽  
Compliant Mechanism ◽  
Dynamic Performance ◽  
Dynamic Problems ◽  
Numerical Result

Dynamic performance is of great importance to compliant mechanisms which are employed in dynamic applications, especially if the dynamic problems in DOC (degree of constraint) directions are to be met. An investigation on the dynamic characteristics of a 2R compliant mechanism is presented. Based on the substructure techniques, the in-plane dynamic model of the preceding compliant mechanisms is developed. The natural frequencies and sensitivities are then analyzed. The numerical result verifies the validity of the proposed method. Finally, optimal design of compliant mechanism is investigated.

Dynamic Performance Analysis for a Butterfly-Shaped Arch Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 74-78
Author(s):  
Hai Yun Huang ◽  
Xiang Rong Yuan ◽  
Ka Hong Cai
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Element Model ◽  
Loading Test ◽  
Structural Dynamic ◽  
Arch Bridge ◽  
Calculation Results ◽  
Dynamic Performance Analysis

The dynamic characteristics are not only the important indexes for evaluating the bridge structural rigidity, but also the principal parameters for structural dynamic analysis and earthquake resistant analysis. In this paper, a three dimensional solid finite element model for a butterfly-shape arch bridge in Zhongshan city was established to analyze the dynamic characteristics. By comparison the numerical calculation results with measured results of the dynamic loading test, an analysis and evaluation of the dynamic performance of this new type spatial arch bridge was made, and can serve as reference to the dynamic analysis and seismic design of similar bridges.

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