共查询到6条相似文献,搜索用时 0 毫秒
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LiuTao Wan Lin Tang Weilin Fan JunState Key Laboratory of Vibration Shock & Noise Shanghai Jiaotong University Shanghai China 《机械工程学报(英文版)》2002,15(2):116-120
The resonance sound radiation from submerged infinite elastic cylindrical shell, excited by internal harmonic line force, is investigated. The shell radiation power is presented in terms of resonant modal radiation derived from resonance radiation theory (RRT). The resonance radiation formulae are derived from classical Rayleigh normal mode solution, which are useful for understanding the mechanism of sound radiation from submerged shells. As an example, numerical calculation of a thin steel cylindrical shell is done by using these two methods. It seems that the results of RRT solutions are in good agreement with that of Rayleigh normal mode solutions. 相似文献
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初始缺陷和比例加载路径对圆柱壳弹塑性稳定性的影响 总被引:3,自引:1,他引:3
应用非线性弹塑性稳定性理论研究圆柱壳在轴向力和内压联合作用下的弹塑性稳定性问题,得到了不同比例加载路径、初始缺陷和塑性变形发展程度对弹塑性失稳的影响规律曲线。结果表明,在内压的作用下,柱壳的临界轴向压应力在初始阶段有所提高,但从某一内压值开始将会有所下降。对于同一比例加载路径,随着缺陷因子的增加,临界屈曲轴向压应力随着相应地递减。而对于同样的缺陷因子,比例加载参数小于1.0时,临界屈曲轴向压应力随着比例加载参数的增大而增大;比例加载参数大于1.0时,临界屈曲轴向压应力随着比例加载参数的增大而减小;比例加载参数等于1.0为理想加载比例参数值。该研究丰富了内高压成形工艺的理论基础。 相似文献
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弹性圆柱壳的稳定性优化设计 总被引:8,自引:3,他引:8
研究任意轴对称边界条件下和受均布法向载荷作用圆柱壳的稳定性优化设计问题,即极大化屈曲临界载荷。利用能量原理分析轴对称变厚度圆柱壳的分支点屈曲,将求解屈曲临界载荷变成求解广义特征值方程,使圆柱壳稳定性优化设计成为极大化最小特征值问题。实际算例验证了本方法的有效性。研究结果可用于圆柱壳的加肋优化设计。 相似文献
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Fan Zijie Dept of Automotive Eng. Qinghua University Kim Kwang Joon Dept of Mechanical Eng. KAIST Korea 《机械工程学报(英文版)》1999,12(4)
0 INTRODUCTIONViscoelasticsurfacedampingtreatmentshavebeenusedformanyyearstoreducevibrationandnoiseofstructuresespeciallyforbeamandplatelikestructures.Althoughsuchsurfacedampingtreatmentshavebeenshowntobeeffectiveinvibrationandnoisecontrol,however,… 相似文献