Method for varying the spring rigidity of an elastomer mount, and a corresponding mount

1993 ◽  
Vol 94 (6) ◽  
pp. 3532-3532
Author(s):  
Volker Härtel ◽  
Matthias Richter ◽  
Mathias Gugsch
Keyword(s):  
Spring Rigidity

Analysis of Dynamic Behavior of Zigzag Groove Setback Arming Device with Two Degree of Freedom

2011 ◽  
Vol 317-319 ◽  
pp. 1739-1744 ◽  
Author(s):  
Guang Lin He ◽  
He Fei Tian
Keyword(s):  
Dynamic Behavior ◽  
Dynamic Simulation ◽  
Rocket Engine ◽  
Degree Of Freedom ◽  
Orthogonal Method ◽  
Optimum Parameters ◽  
Safety And Reliability ◽  
Two Degree Of Freedom ◽  
Spring Rigidity

Focusing on the requirements of safety and reliability of fuze setback arming device of rocket-assisted projectile, a zigzag groove setback device with two degree of freedom was designed with Inventor 6. The dynamic simulation is developed under environment of VisualNastran. The optimum parameters of up inertia-cylinder mass, down inertia-cylinder mass, up inertia-spring rigidity and down inertia-spring rigidity were tested by orthogonal method and simulated. The results indicate that this setback device can effectively differentiate setback overload in launch and impact overload at service handling; credible arming time of fuze is about 128ms when the even overload of the rocket engine is 100g; the optimum mass of up inertia-cylinder and down inertia-cylinder are respectively 3.19g and 1.41g, the optimum rigidity of up inertia-spring and down inertia-spring are respectively 32.7 N/m and 21.8 N/m.

The Spring Rigidity Values Analysis in Incremental Method of Deep Excavation with Considering Interaction among Soil Springs

2010 ◽  
Vol 168-170 ◽  
pp. 312-318
Author(s):  
Cun En Chen ◽  
Chun Bao He
Keyword(s):  
Active Region ◽  
Theoretical Analysis ◽  
Calculation Result ◽  
Deep Excavation ◽  
Passive Region ◽  
Incremental Method ◽  
Foundation Model ◽  
Foundation Deformation ◽  
Excavation Support ◽  
Spring Rigidity

Based on the theory of interaction between deep excavation support structure and subsoil, the influencing coefficient is presented in this paper in the condition of different foundation model. The calculation result shows that the foundation deformation considering interaction among soil springs is large than those not considering the interaction, and also larger than engineering practical condition. Theoretical analysis indicates the stiffness change of soil spring is related to spring rigidity in both active region and passive region when it is calculated by incremental method. The example proves that the method presented in this paper has good preciseness comparing with the results of engineering practical condition. So the theory of incremental method of deep excavation considering interaction is consummated.

Design of Electronic Aviation Oxygen Regulator Structure

2013 ◽  
Vol 421 ◽  
pp. 150-156 ◽  
Author(s):  
Yu Zeng ◽  
Chen Hui Du ◽  
Ying Zhou ◽  
Yu Qing Lan
Keyword(s):  
Design Method ◽  
Reference Value ◽  
Maximum Flow ◽  
Mathematic Model ◽  
Pulmonic Valve ◽  
Matlab Simulink ◽  
Compression Spring ◽  
Spring Rigidity

Operation principal of Electronic Oxygen Regulator (EOR) was explained in this paper. A mathematic model was established on Matlab/Simulink platform to study the maximum flow of pulmonic valve and design method of compression spring rigidity. Selecting criteria for main parameters of EOR is determined quickly and efficiently through simulation. Conclusion of simulation is of great reference value for EOR engineering.

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