噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2015年
3期
87-91
,共5页
振动与波%声振耦合%平板%动力吸振器%遗传算法%声振优化
振動與波%聲振耦閤%平闆%動力吸振器%遺傳算法%聲振優化
진동여파%성진우합%평판%동력흡진기%유전산법%성진우화
vibration and wave%vibro-acoustic coupling%plate%dynamic vibration absorber%genetic algorithm%vibro-acoustic optimization
研究多个动力吸振器优化结构的声振特性。根据Hamilton变分原理建立多个动力吸振器—平板—介质系统的声振耦合动力学方程，给出简支边界条件下耦合方程的解；以吸振器的质量、刚度、阻尼和位置为设计变量，以平板结构表面平均振速级和辐射声功率级为优化目标，采用遗传算法进行优化研究。研究表明：在一定频段内，单个动力吸振器能够降低优化目标10 dB左右，采用多个动力吸振器能够控制结构较宽频带的噪声；对于水下结构，可采用两个动力吸振器进行优化，但不能将空气中吸振器的优化结果直接用于水下结构。研究结果可为动力吸振器的减振降噪设计提供理论依据。
研究多箇動力吸振器優化結構的聲振特性。根據Hamilton變分原理建立多箇動力吸振器—平闆—介質繫統的聲振耦閤動力學方程，給齣簡支邊界條件下耦閤方程的解；以吸振器的質量、剛度、阻尼和位置為設計變量，以平闆結構錶麵平均振速級和輻射聲功率級為優化目標，採用遺傳算法進行優化研究。研究錶明：在一定頻段內，單箇動力吸振器能夠降低優化目標10 dB左右，採用多箇動力吸振器能夠控製結構較寬頻帶的譟聲；對于水下結構，可採用兩箇動力吸振器進行優化，但不能將空氣中吸振器的優化結果直接用于水下結構。研究結果可為動力吸振器的減振降譟設計提供理論依據。
연구다개동력흡진기우화결구적성진특성。근거Hamilton변분원리건립다개동력흡진기—평판—개질계통적성진우합동역학방정，급출간지변계조건하우합방정적해；이흡진기적질량、강도、조니화위치위설계변량，이평판결구표면평균진속급화복사성공솔급위우화목표，채용유전산법진행우화연구。연구표명：재일정빈단내，단개동력흡진기능구강저우화목표10 dB좌우，채용다개동력흡진기능구공제결구교관빈대적조성；대우수하결구，가채용량개동력흡진기진행우화，단불능장공기중흡진기적우화결과직접용우수하결구。연구결과가위동력흡진기적감진강조설계제공이론의거。
The problem of vibro-acoustic characteristic optimization of a plate with dynamic vibration absorbers was investigated. The vibro-acoustic coupling equations of the absorber-plate-medium system were formulated based on Hamilton variational principle. The solutions of the coupling equations under simply-supported constraint condition were given by modal expansion method. Taking the mass, stiffness, damping and location of the vibration absorber as design variables, and the acoustic radiation power level and the surface quadratic velocity level as the objective, the plate-absorbers system was optimized by means of the genetic algorithm. The results reveal that a single dynamic vibration absorber can reduce the optimization objective by 10 dB in some frequency spectrum band, while using multiple vibration absorbers can control the noise in a wider spectrum band. For underwater structures, the optimization can be realized by using two absorbers. But the optimization results of the absorbers in the air cannot be used in the underwater structures directly. The results of this work can be used to design the dynamic vibration absorbers for vibration and noise control of structures.
