Nonlinear coupled dynamics analysis of a truss spar platform

Li, Chengxi; Zhang, Jun

doi:10.1007/s13344-016-0054-2

Cited by 8 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure , the elastic buckling of the fixed‐fixed bar was conducted by DEM with three kinds of particle connections (unjammed, weakly jammed, and fully jammed), and the ratio of critical buckling stress to the Euler solution fluctuates at approximately 1 (dashed line). This phenomenon might relate to the dynamic rate dependency of materials and the dynamic instability of materials.…”

Section: Elastic Buckling Analysis Of Fixed‐fixed Barmentioning

confidence: 99%

Mechanical behavior of porous solid considering mesoscopic elastic buckling

Zhang

Zhao

2020

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

Summary In this work, the elastic buckling of porous solids was investigated using a lattice spring model (LSM). The capability of the LSM to solve elastic buckling problems was comprehensively verified by comparing well‐established numerical and analytical solutions. Following this, the buckling of a porous solid was studied, in which two porous structures were considered, ie, the random porous model and the Voronoi porous model. The results reveal that both the porosity and the shape of the pores influence the elastic buckling bearing capacity of the porous solid. Finally, the mechanical responses of a porous solid with an extra high porosity (0.85) were numerically investigated. Our numerical results demonstrated that the nonlinear elastic response of the porous solid might come from its mesoscale elastic buckling. This work shows the ability and promise of using the LSM as a fundamental numerical tool for the deep investigation of the buckling mechanical behavior of porous solids.

show abstract

Section: Elastic Buckling Analysis Of Fixed‐fixed Barmentioning

confidence: 99%

Mechanical behavior of porous solid considering mesoscopic elastic buckling

Zhang

Zhao

2020

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…It is noted that the guide wall is a hydraulic structure that is partially submerged in water, as shown in Figure 5. For such structures, the vibration is nonlinear and under the effect of the fluidstructure interaction (FSI) [27,28], which means the structural loads and responses are mutually From the FT spectrums, it can be observed that there are several similar dominant frequencies of horizontal displacements between the 1# dam block and the guide wall blocks in a broad range of 0-15 Hz. However, for vertical displacements, similar dominant frequencies are concentrated in a narrow range of 0-5 Hz, which is the range of the dominant frequency of flow excitation [5,27].…”

Section: The Guide Wall Vibration Under Fsimentioning

confidence: 99%

“…For such structures, the vibration is nonlinear and under the effect of the fluidstructure interaction (FSI) [27,28], which means the structural loads and responses are mutually From the FT spectrums, it can be observed that there are several similar dominant frequencies of horizontal displacements between the 1# dam block and the guide wall blocks in a broad range of 0-15 Hz. However, for vertical displacements, similar dominant frequencies are concentrated in a narrow range of 0-5 Hz, which is the range of the dominant frequency of flow excitation [5,27]. For further investigation of this phenomenon, the dominant frequencies of horizontal displacements on the 1# dam block and guide wall blocks are listed in Table 1.…”

Section: The Guide Wall Vibration Under Fsimentioning

confidence: 99%

Section: The Guide Wall Vibration Under Fsimentioning

confidence: 99%

See 1 more Smart Citation

Analysis for the Vibration Mechanism of the Spillway Guide Wall Considering the Associated-Forced Coupled Vibration

et al. 2019

View full text Add to dashboard Cite

During the flood discharge in large-scale hydraulic engineering projects, intense flow-induced vibrations may occur in hydraulic gates, gate piers, spillway guide walls, etc. Furthermore, the vibration mechanism is complicated. For the spillway guide wall, existing studies on the vibration mechanism usually focus on the vibrations caused by flow excitations, without considering the influence of dam vibration. According to prototype tests, the vibrations of the spillway guide wall and the dam show synchronization. Thus, this paper presents a new vibration mechanism of associated-forced coupled vibration (AFCV) for the spillway guide wall to investigate the dynamic responses and reveal coupled vibrational properties and vibrational correlations. Different from conventional flow-induced vibration theory, this paper considers the spillway guide wall as a lightweight accessory structure connected to a large-scale primary structure. A corresponding simplified theoretical model for the AFCV system is established, with theoretical derivations given. Then, several vibrational signals measured in different structures in prototype tests are handled by the cross-wavelet transform (XWS) to reveal the vibrational correlation between the spillway guide wall and the dam. Afterwards, mutual analyses of numeral simulation, theoretical derivation, and prototype data are employed to clarify the vibration mechanism of a spillway guide wall. The proposed mechanism can give more reasonable and accurate results regarding the dynamic response and amplitude coefficient of the guide wall. Moreover, by changing the parameters in the theoretical model through practical measures, the proposed vibration mechanism can provide benefits to vibration control and structural design.

show abstract

Research on the dynamical responses of H-type floating VAWT considering the rigid-flexible coupling effect

Deng

Liu

et al. 2020

Journal of Sound and Vibration

View full text Add to dashboard Cite

Nonlinear coupled dynamics analysis of a truss spar platform

Cited by 8 publications

References 9 publications

Mechanical behavior of porous solid considering mesoscopic elastic buckling

Mechanical behavior of porous solid considering mesoscopic elastic buckling

Analysis for the Vibration Mechanism of the Spillway Guide Wall Considering the Associated-Forced Coupled Vibration

Research on the dynamical responses of H-type floating VAWT considering the rigid-flexible coupling effect

Contact Info

Product

Resources

About