The structural damping property of re zinc base composites 復合材料的結(jié)構(gòu)阻尼特性
The research history and recent develepment of structural damping 結(jié)構(gòu)阻尼的發(fā)展及其研究近況
Structure vibration control is a new kind of anti - earthquake technique . structural damping by energy dampers is one of effective passive control methods and can effectively reduce structure ' s wind vibration and earthquake response 結(jié)構(gòu)振動控制是一種新型的抗震技術,利用耗能器進行結(jié)構(gòu)減震就是一種有效的被動控制方法,能有效的減小建筑結(jié)構(gòu)的風振和地震反應。
The study shows that adequate modes are important to ensure the precision of computation , and different ways to deal with cross terms of force spectra and modals have a great effect on results , and the resonant responses are sensitive to the structural damping ratio 研究表明,選擇足夠數(shù)量的參振模態(tài)對保證計算精度非常重要,力譜交叉項、模態(tài)交叉項的不同處理方法對計算結(jié)果有較大影響,并且結(jié)構(gòu)共振響應對結(jié)構(gòu)阻尼很敏感。
Then a simplified computational modal of damping isolation systems is established for a platform structure , and the relationships between the parameters of isolation layer and structural damping ratio , including their vibration - suppressed effect on the whole structure and the relative displacement of isolation layer are studied , and the simulation analysis under several representative load case of random wave force and earthquake affairs is performed . under random wave force , using complex mode theories , non - classically damp problems considering the interaction between the structure and wave , lying in deepwater , are studied . and the resolution solution of structural response are achieved . the results of calculating and analysing show that adding damping isolation to a jacket is an effective way to reduce vibration for offshore platforms 針對某一典型平臺結(jié)構(gòu),建立了海洋平臺結(jié)構(gòu)阻尼隔振體系簡化計算模型,進行了波浪荷載工況和地震工況的數(shù)值模擬,研究了隔振參數(shù)與結(jié)構(gòu)阻尼比的關系以及它們對結(jié)構(gòu)整體和隔振層層間相對位移的控制效果,運用復模態(tài)理論研究了位于較深水位的固定式導管架海洋平臺在隨機波浪力作用下考慮結(jié)構(gòu)與波浪相互作用時運動方程中非經(jīng)典阻尼的解耦問題,獲得了結(jié)構(gòu)響應的解析解。