振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2015年
17期
131-136
,共6页
江民圣%牛军川%郑建华%隋富生
江民聖%牛軍川%鄭建華%隋富生
강민골%우군천%정건화%수부생
L 型耦合板%能量传递系数%激励频率%波型转换
L 型耦閤闆%能量傳遞繫數%激勵頻率%波型轉換
L 형우합판%능량전체계수%격려빈솔%파형전환
L-shaped coupled plate%energy transfer coefficient%excitation frequency%wave transforming
采用功率流有限元等能量方法研究高铁车厢等大型耦合结构的振动传递特性时,能量传递系数是必须首先要解决的关键问题之一。将 L 型耦合板结构用两耦合的半无限板代替,同时考虑了结构中传递的弯曲波、面内的纵向波和剪切波,采用行波方法对耦合边界处的波型转换进行了研究,对各传递系数进行了求解。在此基础上,讨论了入射波的入射角、板厚、入射波激励频率(20 rad /s 2e6 rad /s)等对波型变换和能量传递系数的影响规律,结果表明板厚和频率对波型变换有着重要影响,同时板厚和激励频率的增加会使面内纵向波和剪切波的作用越来越大,不可忽略。
採用功率流有限元等能量方法研究高鐵車廂等大型耦閤結構的振動傳遞特性時,能量傳遞繫數是必鬚首先要解決的關鍵問題之一。將 L 型耦閤闆結構用兩耦閤的半無限闆代替,同時攷慮瞭結構中傳遞的彎麯波、麵內的縱嚮波和剪切波,採用行波方法對耦閤邊界處的波型轉換進行瞭研究,對各傳遞繫數進行瞭求解。在此基礎上,討論瞭入射波的入射角、闆厚、入射波激勵頻率(20 rad /s 2e6 rad /s)等對波型變換和能量傳遞繫數的影響規律,結果錶明闆厚和頻率對波型變換有著重要影響,同時闆厚和激勵頻率的增加會使麵內縱嚮波和剪切波的作用越來越大,不可忽略。
채용공솔류유한원등능량방법연구고철차상등대형우합결구적진동전체특성시,능량전체계수시필수수선요해결적관건문제지일。장 L 형우합판결구용량우합적반무한판대체,동시고필료결구중전체적만곡파、면내적종향파화전절파,채용행파방법대우합변계처적파형전환진행료연구,대각전체계수진행료구해。재차기출상,토론료입사파적입사각、판후、입사파격려빈솔(20 rad /s 2e6 rad /s)등대파형변환화능량전체계수적영향규률,결과표명판후화빈솔대파형변환유착중요영향,동시판후화격려빈솔적증가회사면내종향파화전절파적작용월래월대,불가홀략。
To study large coupled structures,such as,high speed train bodies,their energy transfer coefficients should be solved firstly when using energy methods,such as,the energy flow finite element method (EFFEM).By using two semi-infinite plates to substitute a L-shaped coupled plate and considering flexural wave,longitudinal wave and share wave in plane simultaneously,the characteristics of wave transforming were investigated and transfer coefficients were solved at the coupled boundary by using the traveling wave method.Furthermore,the effects of incident wave's incident angle,plate thickness and incident wave excitation frequency (20rad /s 2e6rad /s)on the wave transforming and energy transfer coefficients were analyzed.The results showed that the plate thickness and the incident wave excitation frequency have important influences on the wave transforming and energy transfer coefficients;the actions of longitudinal wave and shear wave in plane become larger with increase in plate thickness and incident wave excitation frequency,they can not be neglected.