Results 21 to 30 of about 185,504 (288)

Efficient Method for Derivatives of Nonlinear Stiffness Matrix

Mathematics, 2023
Structural design often includes geometrically nonlinear analysis to reduce structural weight and increase energy efficiency. The full-order finite element model can perform the geometrically nonlinear analysis, but its computational cost is expensive ...
Tuan Anh Bui, Jun-Sik Kim, Junyoung Park
doaj   +1 more source

Effective linear damping and stiffness coefficients of nonlinear systems for design spectrum based analysis [PDF]

, 2010
A stochastic approach for obtaining reliable estimates of the peak response of nonlinear systems to excitations specified via a design seismic spectrum is proposed. This is achieved in an efficient manner without resorting to numerical integration of the
Agathoklis Giaralis, Anagnostopoulos, Basu, Basu, Blandon, Borzi, Cacciola, Calvi, Caughey, Chopra, Chopra, Chopra, Clough, Crandall, Crandall, Der Kiureghian, Di Paola, Dwairi, Elishakoff, Fajfar, Fragiacomo, Giaralis, Gulkan, Gupta, Hadjian, Hurtado, Iwan, Iwan, Iwan, Iwan, Jarenprasert, Jennings, Kanai, Kaul, Koliopoulos, Kowalsky, Kwan, Lin, Miranda, Miranda, Naess, Newmark, Nigam, Park, Park, Pfaffinger, Pol D. Spanos, Politopoulos, Powell, Ramirez, Roberts, Ruangrassamee, Shibata, Spanos, Spanos, Suzuki, Tolis, Tsai, Vanmarcke, Wen, Wolf   +60 more
core   +2 more sources

Stiffness optimization in nonlinear pantographic structures

Mathematics and Mechanics of Solids, 2020
Mechanical metamaterials are microstructured mechanical systems showing an overall macroscopic behaviour that depends mainly on their microgeometry and microconstitutive properties. Moreover, their exotic properties are very often extremely sensitive to small variations of mechanical and geometrical properties in their microstructure.
Boris Desmorat, Mario Spagnuolo, Emilio Turco   +2 more
openaire   +1 more source

Statistical linearization based estimation of the peak response of nonlinear systems subject to the EC8 design spectrum [PDF]

, 2008
A stochastic approach is proposed to obtain reliable estimates of the peak response of nonlinear systems to excitations specified via a response∕design seismic spectrum.
Giaralis, A., Spanos, P. D.
core   +1 more source

Optimal Design of Nonlinear Negative-Stiffness Damper with Flexible Support for Mitigating Cable Vibration

Buildings, 2023
Negative-stiffness damper is a promising device to mitigate cable vibrations effectively. In contrast to traditional rigid supports, recent study has found that flexible supports are actually beneficial for enhancing the performance of negative-stiffness
Guanliang Liu, Peng Zhou, Tong Yu, Zeping Li   +3 more
doaj   +1 more source

Position and Velocity Estimation for Two-Inertia System with Nonlinear Stiffness Based on Acceleration Sensor

Sensors, 2015
In this paper, we consider the state estimation problem for flexible joint manipulators that involve nonlinear characteristics in their stiffness. The two key ideas of our design are that (a) an accelerometer is used in order that the estimation error ...
Kyung-Tae Nam, Seung-Joon Lee, Tae-Yong Kuc, Hyungjong Kim   +3 more
doaj   +1 more source

Appropriate Matching Locations of Rail Expansion Regulator and Fixed Bearing of Continuous Beam Considering the Temperature Change of Bridge

Applied Sciences, 2020
Due to the temperature change of bridges, there is a great additional force in continuously welded rails on continuous bridges. Laying rail expansion regulators is an effective measure to reduce the additional force. The nonlinear finite element model is
Ping Lou, Te Li, Xinde Huang, Ganggui Huang, Bin Yan   +4 more
doaj   +1 more source

Modification of the AFM Sensor by a Precisely Regulated Air Stream to Increase Imaging Speed and Accuracy in the Contact Mode

Sensors, 2018
Increasing the imaging rate of atomic force microscopy (AFM) without impairing of the imaging quality is a challenging task, since the increase in the scanning speed leads to a number of artifacts related to the limited mechanical bandwidth of the AFM ...
Andrius Dzedzickis, Vytautas Bucinskas, Darius Viržonis, Nikolaj Sesok, Arturas Ulcinas, Igor Iljin, Ernestas Sutinys, Sigitas Petkevicius, Justinas Gargasas, Inga Morkvenaite-Vilkonciene   +9 more
doaj   +1 more source

Nonlinear Dynamic Analysis of Rotor-Bearing-Pedestal Systems With Multiple Fit Clearances

IEEE Access, 2020
Dynamic analysis of a rotor-bearing-pedestal system with multiple bearing clearances is conducted in this study. Firstly, Jones-Harris method is used to deduce the equivalent nonlinear support stiffness of angular contact high-speed ball bearing with ...
Dengyun Wu, Qinkai Han, Hong Wang, Yi Zhou, Wenshan Wei, Han Wang, Tao Xie   +6 more
doaj   +1 more source

Performance measures for single-degree-of-freedom energy harvesters under stochastic excitation [PDF]

, 2014
We develop performance criteria for the objective comparison of different classes of single-degree-of-freedom oscillators under stochastic excitation. For each family of oscillators, these objective criteria take into account the maximum possible energy ...
Joo, Han Kyul, Sapsis, Themistoklis P.
core   +1 more source