Authors: Bin Wu, De Dong Huang, Sheng Xi
Abstract: Dual mechanical environment simulators are usually used to supply recoil force and centrifugal force for simulation of liquid reserve batteries during artillery projection. When the vehicle with fuze batteries impacts the wooden block rotating with high speed, whether the transient impact parameters and the time required for the vehicle reaching the rated revolution are in accordance with the test conditions of fuze batteries is one of the key technologies. Finite element simulations are implemented for the transient vehicle impact process, the variation of vehicle acceleration under different projection velocities, the variations of vehicle acceleration and impulse duration with different wooden block thicknesses, and the time required to achieve stable rotational speed are discussed in this paper, which can be a reference for the simulator design.
1414
Abstract: High-g accelerometer and storage test system is designed for the measurement of multi-layer steel targets penetration. The penetration test of the double layer steel target is performed, and the verload acceleration is obtained when the projectile penetrates the steel target. According to the overload data, the effective overload accelerations are concluded. The effective overload accelerations gained when projectile penetrates the double steel targes are 81078g and 152061g respectively. Also from the calculation, it can be concluded that the test errors are all less than 10%, which can meet the requirement of penetrating multi-layer steel targets.
1178
Authors: Qiang Li, Hong Bin Ren
Abstract: Crash simulation systems in laboratory are widely used in the development of components or protect against the crash pulse. Based on a rod control hydraulic engery absorber, the paper describes a new crash simulator providing repeatable simulation of the important parameters of the automobile deceleration pulses during crash condition. The mathematic models of absorber and the control rod design method were presented also .According to replaced the different variable diameter control rod of absorber, the simulator is simple and easy to simulate different crash pulses including total velocity and acceleration during the pulse. and the control effect of the simulator was tested and verified by experiments.
1213
Authors: Xin Fan, Chun Hu
Abstract: According to the national standard on electric vehicle model, pulse input test and random input test were conducted. The results show that: at different speeds through the triangular bump, its maximum acceleration is far less than 31.44m2/s, there is no harm to the driver's health; random input road ride comfort simulation trials has similar results, with the improving speed, the acceleration rms value of the driver's seat increases, but the driver will not feel uncomfortable. In addition, it was analyzed the influence of front and rear suspension spring stiffness and vibration-damper damping on the vehicle ride comfort, and increasing or decreasing of each parameter affect the trend on the vehicle's ride comfort.
552
Authors: Jing Bo Liu, Dong Dong Zhao, Wen Hui Wang, Xiang Qing Liu
Abstract: Two geotechnical centrifuge model tests of a soil-structure system with different burial depths are performed to investigate the interaction between soil and structure. The tests are performed at 50 gravitational centrifuge accelerations and the input motion is Kobe wave. This paper focuses on the accelerations and displacements in the soil-structures system. The peak accelerations and displacements along the axis of the structure and along the vertical line 17cm away from the axis are presented. The acceleration and displacement response due to the interaction between soil and structure are studied.
372