Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift

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ZHANG, Yang ;SHI, Duanwei ;XIAO, Tong ;ZHOU, Ji ;CHENG, Xionghao .
Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 66, n.4, p. 266-275, april 2020. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/pitch-stability-analysis-for-mechanical-hydraulic-structural-fluid-coupling-system-of-high-lift-hoist-vertical-shiplift/>. Date accessed: 24 sep. 2020. 
doi:http://dx.doi.org/10.5545/sv-jme.2019.6467.
Zhang, Y., Shi, D., Xiao, T., Zhou, J., & Cheng, X.
(2020).
Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift.
Strojniški vestnik - Journal of Mechanical Engineering, 66(4), 266-275.
doi:http://dx.doi.org/10.5545/sv-jme.2019.6467
@article{sv-jmesv-jme.2019.6467,
	author = {Yang  Zhang and Duanwei  Shi and Tong  Xiao and Ji  Zhou and Xionghao  Cheng},
	title = {Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {66},
	number = {4},
	year = {2020},
	keywords = {shiplift; pitch stability; hydraulic leveling; Eigen-analysis; dynamics},
	abstract = {Pitch stability of the high-lift wire rope hoist vertical shiplift under dynamic hydraulic levelling has always been an issue of concern. It not only affects working efficiency but also brings significant challenges to operational safety. A new mechanical-hydraulic-structural-fluid (MHSF) coupling dynamics model and a developed semi-analytical method are presented for stable property analysis. The models of the hydraulic levelling subsystem, shallow water sloshing subsystem, the main hoist mechanical subsystem, and the shiplift chamber structure subsystem are built using a closed-loop transfer function, multi-modal theory, and an second-type Lagrangian equation, respectively. Then, a core twenty-one order state matrix of the MHSF coupling system is established using the state-space method. Subsequently, the Lyapunov motion stability theory and Eigen-analysis method are used in combination to judge the pitch stability and analyse the characteristics of the subsystems. Taking four typical high-lift hoist vertical shiplifts as examples, the rationality of the proposed model and method is validated. The results indicate that although the pitch stability safety factor under hydraulic dynamic levelling is reduced by about 15 % to 44 % with respect to hydraulic static levelling, hydraulic dynamic levelling still can meet stability requirements. Furthermore, for the designed 200 m level hoist vertical shiplift, the preliminary design parameters can ensure the pitch stability safety factor under dynamic hydraulic levelling of not less than 1.1. The element most prone to instability is the shallow water sloshing subsystem; increasing the synchronous shaft stiffness or the water boundary layer damping ratio can effectively enhance the pitch stability.},
	issn = {0039-2480},	pages = {266-275},	doi = {10.5545/sv-jme.2019.6467},
	url = {https://www.sv-jme.eu/article/pitch-stability-analysis-for-mechanical-hydraulic-structural-fluid-coupling-system-of-high-lift-hoist-vertical-shiplift/}
}
Zhang, Y.,Shi, D.,Xiao, T.,Zhou, J.,Cheng, X.
2020 April 66. Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 66:4
%A Zhang, Yang 
%A Shi, Duanwei 
%A Xiao, Tong 
%A Zhou, Ji 
%A Cheng, Xionghao 
%D 2020
%T Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift
%B 2020
%9 shiplift; pitch stability; hydraulic leveling; Eigen-analysis; dynamics
%! Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift
%K shiplift; pitch stability; hydraulic leveling; Eigen-analysis; dynamics
%X Pitch stability of the high-lift wire rope hoist vertical shiplift under dynamic hydraulic levelling has always been an issue of concern. It not only affects working efficiency but also brings significant challenges to operational safety. A new mechanical-hydraulic-structural-fluid (MHSF) coupling dynamics model and a developed semi-analytical method are presented for stable property analysis. The models of the hydraulic levelling subsystem, shallow water sloshing subsystem, the main hoist mechanical subsystem, and the shiplift chamber structure subsystem are built using a closed-loop transfer function, multi-modal theory, and an second-type Lagrangian equation, respectively. Then, a core twenty-one order state matrix of the MHSF coupling system is established using the state-space method. Subsequently, the Lyapunov motion stability theory and Eigen-analysis method are used in combination to judge the pitch stability and analyse the characteristics of the subsystems. Taking four typical high-lift hoist vertical shiplifts as examples, the rationality of the proposed model and method is validated. The results indicate that although the pitch stability safety factor under hydraulic dynamic levelling is reduced by about 15 % to 44 % with respect to hydraulic static levelling, hydraulic dynamic levelling still can meet stability requirements. Furthermore, for the designed 200 m level hoist vertical shiplift, the preliminary design parameters can ensure the pitch stability safety factor under dynamic hydraulic levelling of not less than 1.1. The element most prone to instability is the shallow water sloshing subsystem; increasing the synchronous shaft stiffness or the water boundary layer damping ratio can effectively enhance the pitch stability.
%U https://www.sv-jme.eu/article/pitch-stability-analysis-for-mechanical-hydraulic-structural-fluid-coupling-system-of-high-lift-hoist-vertical-shiplift/
%0 Journal Article
%R 10.5545/sv-jme.2019.6467
%& 266
%P 10
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 66
%N 4
%@ 0039-2480
%8 2020-04-17
%7 2020-04-17
Zhang, Yang, Duanwei  Shi, Tong  Xiao, Ji  Zhou, & Xionghao  Cheng.
"Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift." Strojniški vestnik - Journal of Mechanical Engineering [Online], 66.4 (2020): 266-275. Web.  24 Sep. 2020
TY  - JOUR
AU  - Zhang, Yang 
AU  - Shi, Duanwei 
AU  - Xiao, Tong 
AU  - Zhou, Ji 
AU  - Cheng, Xionghao 
PY  - 2020
TI  - Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2019.6467
KW  - shiplift; pitch stability; hydraulic leveling; Eigen-analysis; dynamics
N2  - Pitch stability of the high-lift wire rope hoist vertical shiplift under dynamic hydraulic levelling has always been an issue of concern. It not only affects working efficiency but also brings significant challenges to operational safety. A new mechanical-hydraulic-structural-fluid (MHSF) coupling dynamics model and a developed semi-analytical method are presented for stable property analysis. The models of the hydraulic levelling subsystem, shallow water sloshing subsystem, the main hoist mechanical subsystem, and the shiplift chamber structure subsystem are built using a closed-loop transfer function, multi-modal theory, and an second-type Lagrangian equation, respectively. Then, a core twenty-one order state matrix of the MHSF coupling system is established using the state-space method. Subsequently, the Lyapunov motion stability theory and Eigen-analysis method are used in combination to judge the pitch stability and analyse the characteristics of the subsystems. Taking four typical high-lift hoist vertical shiplifts as examples, the rationality of the proposed model and method is validated. The results indicate that although the pitch stability safety factor under hydraulic dynamic levelling is reduced by about 15 % to 44 % with respect to hydraulic static levelling, hydraulic dynamic levelling still can meet stability requirements. Furthermore, for the designed 200 m level hoist vertical shiplift, the preliminary design parameters can ensure the pitch stability safety factor under dynamic hydraulic levelling of not less than 1.1. The element most prone to instability is the shallow water sloshing subsystem; increasing the synchronous shaft stiffness or the water boundary layer damping ratio can effectively enhance the pitch stability.
UR  - https://www.sv-jme.eu/article/pitch-stability-analysis-for-mechanical-hydraulic-structural-fluid-coupling-system-of-high-lift-hoist-vertical-shiplift/
@article{{sv-jme}{sv-jme.2019.6467},
	author = {Zhang, Y., Shi, D., Xiao, T., Zhou, J., Cheng, X.},
	title = {Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {66},
	number = {4},
	year = {2020},
	doi = {10.5545/sv-jme.2019.6467},
	url = {https://www.sv-jme.eu/article/pitch-stability-analysis-for-mechanical-hydraulic-structural-fluid-coupling-system-of-high-lift-hoist-vertical-shiplift/}
}
TY  - JOUR
AU  - Zhang, Yang 
AU  - Shi, Duanwei 
AU  - Xiao, Tong 
AU  - Zhou, Ji 
AU  - Cheng, Xionghao 
PY  - 2020/04/17
TI  - Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 66, No 4 (2020): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2019.6467
KW  - shiplift, pitch stability, hydraulic leveling, Eigen-analysis, dynamics
N2  - Pitch stability of the high-lift wire rope hoist vertical shiplift under dynamic hydraulic levelling has always been an issue of concern. It not only affects working efficiency but also brings significant challenges to operational safety. A new mechanical-hydraulic-structural-fluid (MHSF) coupling dynamics model and a developed semi-analytical method are presented for stable property analysis. The models of the hydraulic levelling subsystem, shallow water sloshing subsystem, the main hoist mechanical subsystem, and the shiplift chamber structure subsystem are built using a closed-loop transfer function, multi-modal theory, and an second-type Lagrangian equation, respectively. Then, a core twenty-one order state matrix of the MHSF coupling system is established using the state-space method. Subsequently, the Lyapunov motion stability theory and Eigen-analysis method are used in combination to judge the pitch stability and analyse the characteristics of the subsystems. Taking four typical high-lift hoist vertical shiplifts as examples, the rationality of the proposed model and method is validated. The results indicate that although the pitch stability safety factor under hydraulic dynamic levelling is reduced by about 15 % to 44 % with respect to hydraulic static levelling, hydraulic dynamic levelling still can meet stability requirements. Furthermore, for the designed 200 m level hoist vertical shiplift, the preliminary design parameters can ensure the pitch stability safety factor under dynamic hydraulic levelling of not less than 1.1. The element most prone to instability is the shallow water sloshing subsystem; increasing the synchronous shaft stiffness or the water boundary layer damping ratio can effectively enhance the pitch stability.
UR  - https://www.sv-jme.eu/article/pitch-stability-analysis-for-mechanical-hydraulic-structural-fluid-coupling-system-of-high-lift-hoist-vertical-shiplift/
Zhang, Yang, Shi, Duanwei, Xiao, Tong, Zhou, Ji, AND Cheng, Xionghao.
"Pitch Stability Analysis for Mechanical-Hydraulic-Structural-Fluid Coupling System of High-Lift Hoist Vertical Shiplift" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 66 Number 4 (17 April 2020)

Authors

Affiliations

  • Wuhan University, Key Laboratory of Hydraulic Machinery Transients, China 1
  • Wuhan University, School of Power and Mechanical Engineering, China 2

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 66(2020)4, 266-275

https://doi.org/10.5545/sv-jme.2019.6467

Pitch stability of the high-lift wire rope hoist vertical shiplift under dynamic hydraulic levelling has always been an issue of concern. It not only affects working efficiency but also brings significant challenges to operational safety. A new mechanical-hydraulic-structural-fluid (MHSF) coupling dynamics model and a developed semi-analytical method are presented for stable property analysis. The models of the hydraulic levelling subsystem, shallow water sloshing subsystem, the main hoist mechanical subsystem, and the shiplift chamber structure subsystem are built using a closed-loop transfer function, multi-modal theory, and an second-type Lagrangian equation, respectively. Then, a core twenty-one order state matrix of the MHSF coupling system is established using the state-space method. Subsequently, the Lyapunov motion stability theory and Eigen-analysis method are used in combination to judge the pitch stability and analyse the characteristics of the subsystems. Taking four typical high-lift hoist vertical shiplifts as examples, the rationality of the proposed model and method is validated. The results indicate that although the pitch stability safety factor under hydraulic dynamic levelling is reduced by about 15 % to 44 % with respect to hydraulic static levelling, hydraulic dynamic levelling still can meet stability requirements. Furthermore, for the designed 200 m level hoist vertical shiplift, the preliminary design parameters can ensure the pitch stability safety factor under dynamic hydraulic levelling of not less than 1.1. The element most prone to instability is the shallow water sloshing subsystem; increasing the synchronous shaft stiffness or the water boundary layer damping ratio can effectively enhance the pitch stability.

shiplift; pitch stability; hydraulic leveling; Eigen-analysis; dynamics