Advanced Materials Research Vols. 889-890

Abstract: In this paper, a certain type of vehicle missile launching system is the research object, which uses CAE technology to make a flexible coupling system dynamics simulation and analysis to provide a reference for similar tests. Since the complex structure of the vehicle missile system, reasonable assumptions and simplifications are made in establishing the dynamics model. Pro/E is used to build the three-dimensional model, and then it is imported to the ABAQUS to establish its dynamics model. Finally, in a complete virtual prototyping system model, we make a simulation of working conditions, and draw conclusions and analysis. The results show that the use of independent dynamics rigid-flexible coupling model dynamics simulation based on ABAQUS can be more realistic simulation of the process of vehicle missile launch, and it verifies the results of different working conditions, which provides a reference for the vehicle missile launching systems simulation .

Abstract: In this paper, the performance of different hyperelastic constitutive models namely Money-Rivlin, Gent, Ogden and Arruda-Boyce to predict the dynamic characteristic of elastomeric components is investigated. An elastomeric engine mount is chosen as case study. Material Parameters of the different models are extracted by curve fitting on uni-axial stress-strain test data. Both static and dynamic response of the finite element model considering the hyperelastic constitutive models are compared with their measured counterparts and each other. To obtain frequency response function of the component for each model, at first considering proportional damping for elastomeric media, the transient analysis due to impulse excitation is performed on the component and then using FFT transformation, the frequency response function is achieved. The results show that hyperelastic constitutive models can be implemented in predicting both static and dynamic behavior of elastomeric components.

Abstract: A study on the sound pressure distribution and related acoustic parameters estimation bymeans of the acoustics simulation software EASE is presented in this paper. By defining the sound-absorbing material, the types of sound source, the location of sound source, and the related factors, a more accurate model for the specified acoustic field distribution is obtained. It provides certain theory reference for the design of indoor electroacoustics, which saves the cost and time for the development of construction engineering.

Abstract: A certain type of vehicle missile launch system is selected as the research object in this paper. The dynamic model is established on the base of reasonable hypothesis and simplification and by using of PRO / E software. In this paper, we find out the most dangerous thrust eccentric position of the missile and a better anchor position between the erection cylinder and the landing gear by using ADAMS software simulation of different conditions. The research is to provide a reference for the design of relevant weapons systems.

Abstract: The process of drum granulation is forming agglomerate by infiltrating liquid or binder into solid fine powder to produce bond force. Seed particles present different shapes features in granulation process. Different shapes of particles will have different movement trajectory and attitude under the condition of different location or rotational speed in the cylinder. The motion pose of different shape particles are analyzed by the simulation method using discrete element method, this way is better for us to control the time of powder in different drum position and frequency of adding powders per time. Research provides the theoretical basis on regulatory means and control parameters for adding powders and guarantee the production efficiency.

Abstract: Large rectangular flue pipes installed in coal-fired power plants usually need inner supports to ensure their stability. The design and arrangement of inner supports in rectangular flue pipe before electrostatic precipitator have an impact on precipitators effectiveness and lifespan. Currently, there are two schemes used for setting inner supports in China. One is National Standard Specification (NSS) and the other is an American Combustion Engineering company design criterion (CE). No work has been done on the comparison of these two types of inner supports, especially with consideration of ash deposition. In this paper, the effect of ash deposition on pressure drop and velocity distribution in practical production are carried out, which are adopted flue pipes volume 1/8 and 1/16 as the ash layer. The numerical results show that the ash deposition volume have effect on pressure loss of the straight flue pipes. However, the effect depends on the inner supports type.

Abstract: Taking a certain type of diesel engine connecting rod as the research object and the finite element method as the main research means.This paper uses PROE software for solid modeling tool and ANSYS software for finite element analysis tool,Static analysis is carried out on the connecting rod. Analyze connecting rod under different conditions of stress distribution and dangerous parts. This paper provides the reliable basis for the design and improvement of connecting rod.

Abstract: The conventional solution strategy for nonlinear FEM of structural analysis is usually based on Newton-Raphson iteration under an additional constraint equation. So far a lot of nonlinear finite element solution procedures have been devised to provide the basis for most nonlinear finite element computer programs. In order to produce effective, robust solution algorithms, additional constraint equations for nonlinear FEM calculations in the load-displacement space of has been extensively investigated for the last a few decades. However, it is widely believed that due to the additional computations in the controlling of steps and directions of the iteration procedure, there will be more round-off errors accumulated to influence the convergence of solution. In this work, a more simplified solution procedure is presented, which is featured to be with neither iterations nor constraints. A Fortran computer program of the algorithm presented has been implemented in combining with a space truss element of co-rotational procedure. Verification of the procedure has been done by numerical example and a good result achieved.

Abstract: Incandescent and Bromine tungsten lamp have been widely used in the field of airfield lighting currently. This paper proposes a TRIZ application guide map, which leads designers to achieve creative design of LED curved taxiway center line lights, and solve problems like lug height, intensity in design. The LED curved taxiway center line lights designed has characteristics of low power dissipation, and meet the needs of civilian airport lamps generally require (GB/T7256-2005).

Abstract: In order to achieve the goal of saving energy and materials, hydraulic sheet metal drawing press are selected as the research objects. Testing technologies are used to obtain hydraulic press's distribution ratio of forming craft's energy consumption so that the importance of moving beam's structure optimization is revealed. Finite element method is used to comprehensively analyze the stress and displacement activity of original beam, mapping out the place of redundant material in the structure. Then, moving beam's structure is optimized by the method of Topology Optimization, and got redesigned on this basis. Thus, the redesigned hydraulic presss moving beam not only satisfies the basic requirement of safety and reliability, but also reduces 433.19 t carbon emissions during the service life of hydraulic press.