Lightweight Design for a New Tracked Triangular Wheel Structure

2013 ◽  
Vol 744 ◽  
pp. 78-82
Author(s):  
Jun Wen Xing ◽  
Hong Wu Pu ◽  
Xiang Zheng Meng ◽  
Li Qun Bao
Keyword(s):  
Finite Element ◽  
Lightweight Design ◽  
Element Model ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Wheeled Vehicle ◽  
Body Dynamics ◽  
Dry Soil ◽  
Multi Body ◽  
Structure Properties

A new tracked triangular wheel structure was introduced. A whole tracked triangular wheeled vehicle model was built in multi-body dynamics simulation software RecurDyn, and its climbing obstacle performance on the dry soil road was simulated. The author put the simulation results as loading conditions of finite element model. Finite element calculation and lightweight design for tracked triangular wheel base frame were completed. The results showed that the weight of the base frame reduced by 69.8%, the structure properties of the base frame improved, and the lightweight design goal was achieved.

Modal Based Geometric Stiffening Formulation for Dynamics Simulation of Multibody Systems

2011 ◽  
Author(s):  
Fengxia Wang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Dynamics Simulation ◽  
Reduced Model ◽  
Reduced Models ◽  
Modal Reduction ◽  
Body Dynamics ◽  
Geometric Stiffening ◽  
Multi Body

This work concerns the implementation of nonlinear modal reduction to flexible multi-body dynamics. Linear elastic theory will lead to instability issues with rotating beamlike structures, due to the neglecting of the membrane-bending coupling on the beam cross-section. During the past decade, considerable efforts have been focused on the derivation of geometric nonlinear formulation based on nodal coordinates. In this work, in order to improve the convergence characteristic and also to reduce the computation time in flexible multi-body dynamics, which is extremely important for complicated large systems, a standard modal reduction procedure based on matrix operation is developed with essential geometric stiffening nonlinearities retained in the equation of motion. The example used in this work is a rotating Euler-Bernoulli beam, two nonlinear reduced models were established based on modal coordinates, the first reduced model created from theoretical bending and axial mode shapes by Galerkin method; the second reduced model is derived by the standard matrix operator from a full finite element model. Transient simulation results of lower degrees of freedom from above two reduced models are compared with those obtained from full nonlinear finite element model.

Research of Amplification Frame Optimization Based on Optistruct

2012 ◽  
Vol 510 ◽  
pp. 541-544
Author(s):  
Bing Zhong
Keyword(s):  
Stress Distribution ◽  
Structural Optimization ◽  
Working Conditions ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Body Dynamics ◽  
Utilization Ratio ◽  
Simulation Results ◽  
The Cost ◽  
Multi Body

The motion of amplification frame of dumper was simulated by multi-body dynamics simulation software ADAMS, and the danger working conditions of amplification frame were calculated. The stress of amplification frame was simulated and analyzed by Optistruct software. The results show that the stress distribution in amplification frame is not uniform and it is big in the middle and small in the edge zeros. The structure of amplification is optimized according to the simulation results. The utilization ratio of the material increases and the cost of production decreases after structural optimization.

Study on Wheel-Rail Coupled Vibration of Metro with Co-Simulation of Finite Element Analysis and Multi-Body Dynamics Simulation

2015 ◽  
Vol 752-753 ◽  
pp. 636-641
Author(s):  
Wen Jing Sun ◽  
Dao Gong ◽  
Jin Song Zhou
Keyword(s):  
Finite Element ◽  
Dynamics Simulation ◽  
Track Structure ◽  
Coupled Vibration ◽  
Dynamics Model ◽  
Element Analysis ◽  
Modal Reduction ◽  
Body Dynamics ◽  
Flexible Track ◽  
Multi Body

Based on the multi-body dynamics theory and modal-reduction analysis, finite element method and multi-body dynamics were combined to establish the flexible track model. The rigid-flexible coupled dynamics model can reflect the features of coupled vibration accurately. When the flexibility of the rail, damping and stiffness of support layers under the rail are taken into consideration, the whole track structure acted as a buffer while wheel and rail is interacting with each other. Compared with rigid track model, the wheel-rail vibration is less in the flexible track model. The proposed method in this paper is simple and effective, which makes the calculation of vehicle-track dynamic response more convenient and quick.

Locomotive Underactuated Implement Guided via Elastic Elements (L.U.I.G.E.E): A Preliminary Design

2015 ◽  
Author(s):  
Thomas Reilly ◽  
Jerome K. O’Rourke ◽  
Daniel Steudler ◽  
Davide Piovesan ◽  
Roberto Bortoletto
Keyword(s):  
Human Body ◽  
Equilibrium Position ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Original Position ◽  
Preliminary Design ◽  
Top Down ◽  
Body Dynamics ◽  
Multi Body ◽  
Elastic Elements

This paper presents the simulation and fabrication of a bipedal humanoid system actuated with linear springs to produce a standing equilibrium position. The humanoid system is comprised of two leg assemblies connected by a hip bracket. Eleven pairs of springs were attached to the system in locations designed to simulate the muscles and tendons in a human body. The assembly was modeled in the multi-body dynamics simulation software SimWise 4D. Simulations were performed to determine the springs’ stiffness and natural lengths using a top-down heuristic approach. After a set of springs were found to produce a good simulated stable position, they were cross referenced to standard commercially-available parts. A final simulation was then performed to verify that the real-world spring values produced a stable system. Working in tandem with SimWise 4D, the humanoid assembly was fabricated using PLA plastic via an extrusion-type rapid prototyping machine. From the results of the simulation, the set of working springs were implemented onto the plastic model. After final modifications, the assembly then produced a standing equilibrium position. Finally, the assembly was perturbed in several directions to ensure that after the system experienced a displacement it would then return to its original position.

Simulation Analysis of an Ambulance Carriage Interior Noise

2014 ◽  
Vol 535 ◽  
pp. 581-585
Author(s):  
Shi Ke Hou ◽  
Song Bai ◽  
Hao Jun Fan ◽  
Hui Ding ◽  
Yong Zhong Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Boundary Element ◽  
Simulation Analysis ◽  
Coupled Model ◽  
Element Model ◽  
Simulation Software ◽  
Vehicle Body ◽  
Field Point ◽  
Acoustic Contribution ◽  
Multi Body

Based on the theory of multi-body system dynamics, the analytical method of finite element and boundary element, the finite element model of vehicle body, the rigid-flexible coupled model of vehicle and the acoustic boundary element model of carriage were established by applying a variety of simulation software. Road roughness was simulated and the SPL of field point in carriage under the excitation was computed at the frequency range of 20-150Hz. Considering the size and the positive /negative nature of panels acoustic contribution at SPL peak of field point, damping treatments were taken on different combinations of panels to decrease multiple field points SPL peak and the optimal treatment was finally confirmed. The results showed that noise reduction measures can generally decrease the SPL peak around the crew.

Simulation and Study on Ride Comfort of Articulated Dump Truck Based on Rigid-Flex Coupling

2014 ◽  
Vol 494-495 ◽  
pp. 55-58
Author(s):  
Jie Guo
Keyword(s):  
Finite Element ◽  
Ride Comfort ◽  
Dynamic Theory ◽  
Dynamics Simulation ◽  
Dump Truck ◽  
Body System ◽  
Finite Element Software ◽  
Body Dynamics ◽  
Set Up ◽  
Multi Body

For the poor ride comfort performance of the articulated dump truck, the dynamic model of ADT was built and its dynamic characteristics were also studied through finite element and multi-body system dynamic theory. According to the modal neutral file generated by finite element software with the flexible processing, the flexible coupling virtual prototyping model was set up for the multi-body dynamics simulation in ADAMS to obtain and analyze the data about the ADT ride comfort. This paper provided references for the design, redesign and optimization of the ADT.

Modal and Strength Analysis of Crankshaft in Piston Compressor

2014 ◽  
Vol 945-949 ◽  
pp. 676-679
Author(s):  
Zhi Juan Sun ◽  
Jing Tao Dai
Keyword(s):  
Finite Element ◽  
Fatigue Strength ◽  
Theoretical Basis ◽  
Piston Compressor ◽  
Element Model ◽  
Strength Analysis ◽  
Dynamics Model ◽  
Body Dynamics ◽  
Comprehensive Performance ◽  
Multi Body

For research on comprehensive performance of crankshaft in piston compressor, multi-body dynamics model was built to get mechanical boundary conditions of the crankshaft, and the fatigue strength was verified; Finite element model (FEM) of the crankshaft was established, and the 1st 6 modal of the crankshaft was obtained. The results showed that fatigue strength and dynamic characteristic of the crankshaft was qualified. Theoretical basis could be provided for optimize the crankshaft’s structure by fatigue strength and modal analysis.

Multi-Body Dynamics Analysis of V-Type Diesel Engine Crankshaft

2014 ◽  
Vol 988 ◽  
pp. 617-620
Author(s):  
Ran Ran Wang ◽  
Yan Ming Xu ◽  
Xian Bin Teng
Keyword(s):  
Finite Element ◽  
Diesel Engine ◽  
Dynamic Models ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Finite Element Software ◽  
Body Dynamics ◽  
Multi Body ◽  
Engine Crankshaft

Based on the V-type diesel engine crankshaft system, the paper combined the finite element method (fem) and multi-body dynamics method together, made a virtual simulation analysis. First, by 3d software and finite element software to establish the multi-body dynamic models of the crankshaft, bearing and piston, then simulated the actual engine working condition, and got the data such as crankshaft acceleration, velocity and displacement by the multi-body dynamics simulation analysis. By calculation, the paper found that by using the combination of finite element and multi-body simulation method, can we effectively simulate the diesel engine crankshaft dynamics characteristics.

Multi-body dynamics co-simulation of hoisting wire rope

2017 ◽  
Vol 53 (1) ◽  
pp. 36-45 ◽  
Author(s):  
Qing Huang ◽  
Zhi Li ◽  
Hong-qian Xue
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Analysis ◽  
Dynamic Model ◽  
Loading Condition ◽  
Element Model ◽  
Wire Rope ◽  
Body Dynamics ◽  
Hoisting System ◽  
Multi Body

As more wire ropes with complex construction are used in the hoisting system of a crane, it becomes more necessary to predict the risks of the hoisting operation. Especially the wire rope, dynamic analysis is required to manage the potential risk in advance. Thus, in this article, a co-simulation method based on multi-body dynamics and finite element method is proposed to determine the dynamic responses of a hoisting system and wire rope. We developed a dynamic model of hoisting system based on ADAMS/Cable to formulate the time history response of dynamic force on wire rope, which could be used as the loading condition in the posterior finite element model. A three-dimensional geometric model for the multi-layered strands wire rope with a construction of 1+7+7 / 7+14 wires is implemented in the finite element analysis software ABAQUS, and both static and dynamic analyses are presented. The static analysis result of force–strain relation is compared with several experiment data, and the finite element model is proved accurate and reliable. In the latter case, the force–time curves obtained by dynamic model are imported to finite element model as loading condition to accomplish dynamic analysis. The co-simulation results of hoisting wire rope’s behavior subjected to dynamic loading during the hoisting process are carried out and discussed. The stress distribution and stress spectrum of wire rope are obtained, and the results show that the most dangerous regions are the lateral side of wire rope, especially the contact area of two wires in strands.

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