000021628 001__ 21628
000021628 005__ 20170622131256.0
000021628 04107 $$aeng
000021628 046__ $$k2017-06-15
000021628 100__ $$aSchmitter, Maximilian
000021628 24500 $$aSIMPLIFIED NUMERICAL MODELING STRATEGIES OF DEEP VIBRATORY COMPACTION

000021628 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021628 260__ $$bNational Technical University of Athens, 2017
000021628 506__ $$arestricted
000021628 520__ $$2eng$$aIn this paper different simplified approaches for numerical simulation of deep vibratory compaction are presented. In the first approach, modal analysis yields the mode shapes and natural frequencies of a planar soil model, with the objective of reducing the degrees of freedom of the soil continuum in a subsequent response history analysis considering only the most dominate modes. Based on the maximum elastic strain energy per mode criterion, the most dominant modes excited by a rotating force are identified, revealing that the most dominant natural frequencies are clustered around multiples of the excitation frequency. It is also shown that 1.4 % of the modes contribute to 80 % of the total strain energy. The second study addresses modeling of vibro-soil interaction, approximating the soil as three-dimensional planar circular section and the vibratory as rigid cylinder rotating in the hole at the soil center. To the surfaces of the two bodies potentially in contact, a contact formulation is assigned. The outcomes of the numerical simulations on this finite element model serve as input for system identification of the soil parameters varying with time due to the compaction process. The underlying lumped parameter model is composed of two discrete spring-dashpot systems and a lumped mass subjected to a rotating force. The contact force can be reasonably identified, however, the utilized mapping algorithm for identification of the time varying soil parameter needs further investigation.

000021628 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021628 653__ $$aSoil Dynamics, Deep Vibratory Compaction, Current State Simulation, Parameter Identification, Numerical Modeling

000021628 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021628 720__ $$aSchmitter, Maximilian$$iAdam, Christoph
000021628 8560_ $$ffischerc@itam.cas.cz
000021628 8564_ $$s7488161$$uhttps://invenio.itam.cas.cz/record/21628/files/17293.pdf$$yOriginal version of the author's contribution as presented on CD, section: [RS21] Soil dynamics
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000021628 962__ $$r21500
000021628 980__ $$aPAPER