Modeling and dynamic characteristics analysis on a three-stage fast-response and large-flow directional valve

2014 ◽  
Vol 79 ◽  
pp. 187-199 ◽  
Author(s):  
Bing Xu ◽  
Ruqi Ding ◽  
Junhui Zhang ◽  
Qi Su
Keyword(s):  
Dynamic Characteristics ◽  
Fast Response ◽  
Characteristics Analysis ◽  
Large Flow ◽  
Dynamic Characteristics Analysis

Dynamic Characteristics Analysis of High Water-Based Large Flow Safety Valve

2011 ◽  
Vol 291-294 ◽  
pp. 2438-2442 ◽  
Author(s):  
Jian Li Zhang ◽  
Da Lei Li ◽  
Sheng Gang Ma ◽  
Yong Qiang Wang ◽  
Pan Di Fu
Keyword(s):  
Dynamic Characteristics ◽  
Safety Valve ◽  
High Water ◽  
Water Based ◽  
Mining Machinery ◽  
Characteristics Analysis ◽  
The Mathematical Model ◽  
Large Flow ◽  
Dynamic Characteristics Analysis ◽  
Test Result

The FAD3000/50 safety valve is researched that is newly developed by Zhengzhou Coal Mining Machinery Group Co.,Ltd with high water-based pressure ultra great current capacity. The mathematical model is fistly established according to the study of its structure and the practical system on hydraulic support. The simulation computation has carried under the MATLAB software, and this simulation model has confirmed through the test result. After a comparison of multiple sets of simulation results, the influence of primary structure parameter’s change in safety valve to dynamic characteristics is gived.

Dynamic Characteristics Analysis of Cable-Rib Tension Deployable Antenna

2016 ◽  
Author(s):  
Liu Ruiwei ◽  
Hongwei Guo ◽  
Zhang Qinghua ◽  
Rongqiang Liu ◽  
Tang Dewei
Keyword(s):  
Dynamic Characteristics ◽  
Structural Parameters ◽  
Element Model ◽  
Structure Design ◽  
Antenna Structure ◽  
Characteristics Analysis ◽  
New Type ◽  
Dynamic Characteristics Analysis ◽  
The Finite Element Model ◽  
Weight Dynamic

Balancing stiffness and weight is of substantial importance for antenna structure design. Conventional fold-rib antennas need sufficient weight to meet stiffness requirements. To address this issue, this paper proposes a new type of cable-rib tension deployable antenna that consists of six radial rib deployment mechanisms, numerous tensioned cables, and a mesh reflective surface. The primary innovation of this study is the application of numerous tensioned cables instead of metal materials to enhance the stiffness of the entire antenna while ensuring relatively less weight. Dynamic characteristics were analyzed to optimize the weight and stiffness of the antenna with the finite element model by subspace method. The first six orders of natural frequencies and corresponding vibration modes of the antenna structure are obtained. In addition, the effects of structural parameters on natural frequency are studied, and a method to improve the rigidity of the deployable antenna structure is proposed.

Dynamic Characteristics Analysis of an Ambulance with Hydraulically Interconnected Suspension System

2018 ◽  
Author(s):  
Bohuan Tan ◽  
Yang Wu ◽  
Nong Zhang ◽  
Bangji Zhang ◽  
Minyi Zheng ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Suspension System ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis
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