噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2013年
z1期
367-369
,共3页
声学%铝型材%结构声-耦合%透射声功率%隔声%结构优化
聲學%鋁型材%結構聲-耦閤%透射聲功率%隔聲%結構優化
성학%려형재%결구성-우합%투사성공솔%격성%결구우화
acoustics%aluminium extrusion%coupled vibro-acoustic%sound transmission loss%structural optimization
对铝型材结构建立结构-声耦合有限元模型,通过结构优化的方法提高铝型材结构的低频(50 Hz~1200 Hz)隔声效果。在入射声功率不变的条件下,隔声优化等效为透射声功率最小化。方法是采用混合整数规划算法,以各层板厚度为设计变量,在不明显改变质量的约束下使得带宽透射声功率最小。结果显示优化后600 Hz以上隔声效果有较明显提高。
對鋁型材結構建立結構-聲耦閤有限元模型,通過結構優化的方法提高鋁型材結構的低頻(50 Hz~1200 Hz)隔聲效果。在入射聲功率不變的條件下,隔聲優化等效為透射聲功率最小化。方法是採用混閤整數規劃算法,以各層闆厚度為設計變量,在不明顯改變質量的約束下使得帶寬透射聲功率最小。結果顯示優化後600 Hz以上隔聲效果有較明顯提高。
대려형재결구건립결구-성우합유한원모형,통과결구우화적방법제고려형재결구적저빈(50 Hz~1200 Hz)격성효과。재입사성공솔불변적조건하,격성우화등효위투사성공솔최소화。방법시채용혼합정수규화산법,이각층판후도위설계변량,재불명현개변질량적약속하사득대관투사성공솔최소。결과현시우화후600 Hz이상격성효과유교명현제고。
An optimization study of Aluminium Extrusion for minimum sound transmission in low frequency band (50 Hz~1 200 Hz), subject to the constraints on the Weight is presented. Taken the thickness of each layer as design variable, with the use of Mixed Integer Programming Algorithm, minimized value of transmission power and corresponding thickness are obtained. Results show that sound power transmission is reduced and sound transmission loss is increased above 600 Hz.