Papers by Seyyed Ali Mousavi Gavgani
Ocean engineering, Apr 1, 2024
Marine systems and ocean technology/Marine systems & ocean technology, Jul 9, 2024
مهندسی عمران شریف, May 22, 2021
|wHDUH sD} Qwor= 'xOW nvy=ty |tQH Qo = Q}t '|vwr@=W |wmU %|O}rm u=oS=w "p=}U w xR=U u}@ VvmQOv= '... more |wHDUH sD} Qwor= 'xOW nvy=ty |tQH Qo = Q}t '|vwr@=W |wmU %|O}rm u=oS=w "p=}U w xR=U u}@ VvmQOv= '|vwtQ=y xtOkt "1 uwvm= w CU= Gwt |wQ}v '=ywmU |L=Q] CyH ?r=e Q=@ 'TQ=i G}rN R}NxrRrR [5] "CU= OwHwt TQ=i G}rN QO |vwr@=W`wv R= |}=} QO C@=F |wmU =yOY '=yu; QO xWQa xHwD p@=k sQH w |vwr@=W |=ywmU sm |DNU x@ xHwD =@ Vy=m "Ovm|t =i}= =yu; ?U=vt OQmrta QO |tyt Vkv '=yV=aDQ= u= R}t Vy=m Qta |Q@= Q@ wO V}=Ri= x@ QHvt Ov=wD|t wmU l} V=aDQ= |xvt=O |OYQO 15 [6] "OwW |UQR=@ w |Q=Oyov 'Q}taD |=yxv}Ry Vy=m w wmU |v=UQCtON |=yVwQ R= xO=iDU= '=yxR=U |=yV=aDQ= Vy=m |= Q@ ?U=vt |=yxO}= R= |m} xt}v 'p=ai 'p=aiQ}e %|xDUO 4 x@ |rm CQwYx@ xR=U pQDvm |=yVwQ "CU= pQDvm [7] "OvwW|t s}UkD |@}mQD w p=ai Q=@ u}rw= xm 'CU= pQDvm |=yVwQ u} QDxDi=} xaUwD R= |m} p=aiQ}e pQDvm '1979 p=U QO [8] "OW |iQat V}B p=U 120 R= V}@ w 1 ur}t u=H \UwD |Div |wmU |=yV=aDQ= Vy=m QO xOW xQ=W= |rQDvm |=yQ= R@= Q}F-=D Q=@ u}rw= |= Q@ =ywmU p=aiQ}e pQDvm |= Q@ |irDNt |=yQ= R@= R= u= QoVywSB [9] "CU= xOW xar=]t |=y?; QO , qwtat xm 'OvDUy C@=F |x}=B =@ |=ywmU`wv R= |vwr@=W |=ywmU 1890 p=U R= |vwr@=W |=ywmU [1] "OvwW|t xO=iDU= QDt 100 R= QDtm jta =@ =yu; O}it Qta w Ov=xOW xO=iDU= |a}@]`@=vt h=WDm= |= Q@ |}xOQDUo CQwYx@ QO OwN O}it Qta pw] QO QwmPt |=yxR=U [2] "CU= xOw@ p=U 25 OwOL QO xrRrR w |}=} QO u=}QH 'M} 'O=@ '=}QO Gwt %Ovv=t '|irDNt |]}Lt |=yQ=@ ZQat |Q}F-=D Q@ xwqa Ovv=wD|t w OvQ=O |m}t=v}O C}y=t '|]}Lt |=yQ=@ [3] "OvQ=O Q= Qk xDW=O x= Qty x@ R}v = Q |}xR=U <= RH= |@=QN 'wmU R= |Q=OQ@xQy@ OvwQ QO |ivt [4] "OvW=@ 'u; R= |W=v |=yV=aDQ= w G=wt= |wQ}v 'xOW Qm P |m}t=v}O |=ywQ}v u}@ R= u=OvJ xv j]=vt QO u}vJty "Ovvm|t =i}= wmU Qta w OQmrta QO |QFwt Vkv pwUt xOvU}wv "1399 7 5 VQ}PB '1399 6 2 x}LqY= '1399 2 27 Ci=} QO %M}Q=D
Journal of Vibration Engineering & Technologies
Journal of Building Engineering
Advances in Bridge Engineering
Early detection of structural damages and making necessary interventions to repair them are one o... more Early detection of structural damages and making necessary interventions to repair them are one of the main challenges in structural health monitoring. The wavelet transform is one of the common methods for this purpose, and its efficiency is proven by many researchers. In the present study, this approach is used to assess the performance of Sani-khani bridge with single and multiple-damage scenarios. For this purpose, the displacement response difference between the intact and damaged bridge decks under a moving load is analyzed by discrete wavelet transform (DWT). In the present study, 10 sensors and one-time sampling are used, In fact, the proposition of a method that uses the minimum number of required sensors for practical damage detection. To verify the reliability of the suggested method, not only different damage locations were considered, but also 5% noise is considered for the input signals. The attained results proved that even in the presence of the noise, the proposed a...
Advances in Intelligent Systems and Computing
Jacket platforms are life bloods of oil-rich countries and one of the well-studied offshore struc... more Jacket platforms are life bloods of oil-rich countries and one of the well-studied offshore structures subjected to environmental loads. In the Persian Gulf, wave loads are the dominant load in designing procedure. Vibration control of jacket platforms is always one of the important issues for demanding requirements such as production activity, safety and serviceability. Tuned Mass Damper (TMD) is one of the well-established control systems in this context. The present study investigates the dynamic behavior of the Ressalat platform located in the Persian Gulf under the wave loads. An Active Tuned Mass Damper (ATMD) is employed for vibration control, while taking the actuator saturation into account. A fuzzy controller is applied to calculate the control force. Moreover, the Harmony Search Algorithm (HSA) is examined to optimize the power of the actuator in the control system. Results obtained through this study indicate superior performance of the proposed ATMD in comparison to the TMD, leading to significant reduction in vibration of the Ressalat platform under studied wave loads.
Advances in Structural Engineering—Optimization
This chapter describes some of the recent studies on the optimal control of structures. Initially... more This chapter describes some of the recent studies on the optimal control of structures. Initially, different passive, active and semi-active control devices are introduced and the importance of optimization in each case is discussed. A comprehensive literature review on the optimal design of various well-known control devices of each category i.e., Tuned Mass Damper (Active, Passive and Semi-Active modifications), Fluid Viscous Damper (Passive and Semi-Active), Viscoelastic Damper and Base Isolation (Passive and Semi-Active) and Active Tendon with special attention to the first studies and studies performed in the last decades, is presented. To suppress tall building vibrations subjected to wind and seismic loads, Tuned Mass Dampers (TMDs) modification have recently gained attention due to their simplicity, stability and reliability. Therefore, in the last section, the results of some recent studies on the optimization of Active and passive Tuned Mass Dampers and a recently proposed promising modification of TMD (i.e. Tuned Mass Damper Inerter) are comprehensively discussed.
Applied Ocean Research, 2021
Jacket platforms are among the most used offshore platforms for energy extraction from seabed and... more Jacket platforms are among the most used offshore platforms for energy extraction from seabed and are prone to failure caused by the inherent dynamic nature of wave loads. Therefore, vibration control of these structures with the goal of enhancing efficiency and preventing structural damage is of outmost importance. In current work, semi-active control of the Ressalat jacket platform using a large-scale magnetorheological (MR) damper with fuzzy logic controller is investigated with the aid of the computationally efficient modified endurance wave analysis (MEWA), considering waves with return periods of 2, 5, 10, 20, 50 and 100 years. The effect of number of dampers, fluid-structure interaction, added mass effects and actuator saturation has been simultaneously implemented in the current study. A total of six performance indices based on maximum and root mean square (RMS) of responses (inter-story displacement, velocity and acceleration) are used to assess the efficiency of the control method for waves with different intensities and return periods. Results of current analyses provide a comprehensive overview of the performance of the MR damper for the semi-active control of the Ressalat jacket platform under different wave loads with different return periods and show an acceptable performance for all the considered wave loads, with the goal of enhanced safety and increased service life.
Proceedings of 6th International Conference on Harmony Search, Soft Computing and Applications, 2020
Jacket platforms are life bloods of oil-rich countries and one of the well-studied offshore struc... more Jacket platforms are life bloods of oil-rich countries and one of the well-studied offshore structures subjected to environmental loads. In the Persian Gulf, wave loads are the dominant load in designing procedure. Vibration control of jacket platforms is always one of the important issues for demanding requirements such as production activity, safety and serviceability. Tuned Mass Damper (TMD) is one of the well-established control systems in this context. The present study investigates the dynamic behavior of the Ressalat platform located in the Persian Gulf under the wave loads. An Active Tuned Mass Damper (ATMD) is employed for vibration control, while taking the actuator saturation into account. A fuzzy controller is applied to calculate the control force. Moreover, the Harmony Search Algorithm (HSA) is examined to optimize the power of the actuator in the control system. Results obtained through this study indicate superior performance of the proposed ATMD in comparison to the TMD, leading to significant reduction in vibration of the Ressalat platform under studied wave loads.
Books by Seyyed Ali Mousavi Gavgani
Springer, Cham, 2020
This chapter describes some of the recent studies on the optimal control of structures. Initially... more This chapter describes some of the recent studies on the optimal control of structures. Initially, different passive, active and semi-active control devices are introduced and the importance of optimization in each case is discussed. A comprehensive literature review on the optimal design of various well-known control devices of each category i.e., Tuned Mass Damper (Active, Passive and Semi-Active modifications), Fluid Viscous Damper (Passive and Semi-Active), Viscoelastic Damper and Base Isolation (Passive and Semi-Active) and Active Tendon with special attention to the first studies and studies performed in the last decades, is presented. To suppress tall building vibrations subjected to wind and seismic loads, Tuned Mass Dampers (TMDs) modification have recently gained attention due to their simplicity, stability and reliability. Therefore, in the last section, the results of some recent studies on the optimization of Active and passive Tuned Mass Dampers and a recently proposed promising modification of TMD (i.e. Tuned Mass Damper Inerter) are comprehensively discussed.
Uploads
Papers by Seyyed Ali Mousavi Gavgani
Books by Seyyed Ali Mousavi Gavgani