上海交通大学学报(自然版) ›› 2015, Vol. 49 ›› Issue (09): 1300-1305.
王伊卿a,张腾a,匡新斌a,卢秉恒a,洪军a,徐明龙b
收稿日期:
2014-09-05
出版日期:
2015-09-30
发布日期:
2015-09-30
基金资助:
机械结构强度与振动国家重点实验室开放课题(SV2013KF03),陕西省工业攻关项目(2014K0603)
WANG Yiqinga,ZHANG Tenga,KUANG Xinbina, LU Binghenga,HONG Juna,XU Minglongb
Received:
2014-09-05
Online:
2015-09-30
Published:
2015-09-30
摘要:
摘要: 根据Timoshenko梁理论考虑NiTi回复应力作用,建立了NiTiAl金属基复合材料梁(简称复合梁)的自由振动微分方程,研究了复合梁的固有频率调节特性.对于悬臂梁,NiTi回复应力使复合梁呈压应力状态,造成固有频率降低,在梁长度80 mm、NiTi体积分数8%、预应变3%时,温度由20 ℃升至80 ℃,固有频率的减小量可达52.1%.对于固支梁,其内部应力状态取决于NiTi回复应力和热膨胀共同作用,使固支梁固有频率增加的最小NiTi体积分数约为20%.最后,利用超声波焊接技术制造了复合梁,通过热模态实验测试了NiTiAl悬臂梁固有频率随温度变化规律.结果表明,埋入NiTi能有效调节复合梁固有频率,且实验结果与理论计算结果规律一致. 关键词: 中图分类号: 文献标志码: A
中图分类号:
王伊卿a,张腾a,匡新斌a,卢秉恒a,洪军a,徐明龙b. NiTi-Al金属基复合材料梁固有频率调节特性理论与实验研究[J]. 上海交通大学学报(自然版), 2015, 49(09): 1300-1305.
WANG Yiqinga,ZHANG Tenga,KUANG Xinbina, LU Binghenga,HONG Juna,XU Minglongb. Theoretical and Experimental Research of Frequency Tuning Characteristics of NiTi-Al MMCs Beam[J]. Journal of Shanghai Jiaotong University, 2015, 49(09): 1300-1305.
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