the response of a rigid block is very sensitive to small changes in its size and slenderness ratio and to the details of the ground motion. Systematic trends are not apparent: (Yim, Chorpa and Penzien, 1980) In an attempt to understand the nonlinear and poorly conditioned phenomena of the response of rigid
A COMPARISON OF SASSI2010 and SAP2000 FIXED To simulate the fixed-base condition in SASSI model, the RXB was placed on top of a rigid half-space with the S-wave velocity of 80,000 fps and P-wave velocity of 160,000 fps. As implemented in the SAP2000 analysis, the RXB structure was connected to the rigid half space using 3D rigid springs. To
gears, the systematic dynamic response of the shearers drum driving system has received considerable atten-tion from researchers and engineers. Dolipski et al.46 described a lumped-parameter dynamic model of a shearers cutting system and verified it through experi-mental tests, and the interactions of coal hardness and
Analysis of y shing rod casting dynamicstransient response of the y rod, in which y rod responses were simulated for a forward casting stroke. The lumped parameter method was used to discretize the y line system. Fly line motions were simulated during a cast based ony rod tip response, which
Comparison of the Approaches Used for the Evaluation It should be noted that the force F is a dynamic force. In order to apply this load in a static manner, it is convenient to introduce the concept of the Dynamic Load Factor (DLF). This factor is determined as the ratio of the dynamic deformation at any time to the deflection which would have resulted from the static application of the load F.
Dynamic behaviors of the foundation shall be firstly verified by modal analysis. All modes with frequencies up to 601.2 f0 = Hz shall be extracted. Usually 30 40 modes are enough. First 2 4 modes present rigid body translational (in horizontal plane) or translational-rotational modes.
DYNAMIC LOAD ALLOWANCE FOR REINFORCED Table 2:Summary of complete FE model of Terex crane . Figure 2:An FE model of the Terex crane. The third vehicle, the FDOT truck, was chosen because of its purposedly designed stiff suspension. The FDOT truck was custom-built for the FDOT to conduct dynamic tests on
Design of Reduced Graphene Oxide Based Piezo-Resistive The material used to form microstructure and central block is Kapton with density of 1300 Kg/m 3, Relative permittivity of 2.9, Youngs modulus of 3.1 Gpa and Poissons ratio 0.34 and Nylon for plastic rod with Poissons ratio 0.4.The Parametric analysis is carried out and as per the study the length, width, thickness of 4 beams are 10 mm, 2 mm and 0.175 mm respectively.
Jan 01, 2008 · Abstract. The dynamic response of moored crane-ship is studied. Governing equations for the dynamic response of a crane-ship coupled with the pendulum motion of the payload are derived based on Lagranges equations. The boom is modeled based on finite element method, while the payload is modeled as a planar pendulum of point mass.
Effect of body configuration and deformation on the identifying the optimal rigid body configuration to achieve desired dynamic behavior. In the second set, the effect of the body deformations is investigated. Method of eigenvalues and eigenvectors are used to identify the dynamic modes. The response of the system is calculated by integrating the perturbed linearized equations of motions of a
Frontiers The Influence of Overhead Cranes in the Figure 2.(A) Precast portal frame with overhead crane.(B) Considered simplified 3 degrees of freedom system (3DOF).m 1 is the roof mass; k 1 and c 1 are the lateral stiffness and viscous damping of the columns; m 2 is the mass of the overhead crane; k 2 and c 2 are the vertical stiffness and viscous damping of the crane; m 3 and c 3 are the mass and viscous damping of the hoist load
dynamic response of railway and carriage under the high speed moving loads. Dynamic response of the rail and carriage due to action of multi-roller carriage was determined by means of the finite element method. Wu, and Thompson  have investigated vibration analysis of
Seismic responses and dynamic characteristics of boom With the wide use and longer life cycle of tower crane, the risk of coming across earthquake during service period increases. Hence, the seismic responses and dynamic characteristics of tower crane are becoming more important. In this paper, seismic responses and dynamic characteristics of boom tower crane were analyzed basing on measured strong earthquake excitation.Dynamic response of tower crane induced by the pendulum Jan 01, 2006 · It is found that the dynamic responses of the tower crane are dominated by both the first few natural frequencies of crane structure and the pendulum motion of the payload. The dynamic amplification factors generally increase with the increase of the initial pendulum angle and the changes are just slightly nonlinear for the planar pendulum motion.