共查询到18条相似文献,搜索用时 140 毫秒
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《现代制造技术与装备》2021,(8)
介绍了前置后驱客车传动轴的具体设计校核方式,主要从传动轴的结构、布置形式、临界转速校核、扭矩应力及传动轴总成不平衡量等关键参数展开说明,并根据关键参数的管控合理性设计了传动轴,使整车能够平稳运行。 相似文献
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介绍了十字万向传动轴的工作原理,对其运动特性、常用布置形式、主要性能参数进行了分析;并以梅钢热轧厂热卷箱传动轴为例,进行强度校核及轴承寿命计算,对于十字万向传动轴的实际应用有一定的指导意义. 相似文献
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基于虚拟样机的轿车天窗运动机构的设计 总被引:5,自引:0,他引:5
针对轿车天窗国产化和自主开发中的关键技术进行设计研究。首先分析轿车天窗的结构组成及工作原理,采用逆向工程建立轿车天窗的三维数模,构建虚拟样机,并对其进行虚拟装配。采用虚拟样机分析软件ADAMS对轿车天窗运动执行机构进行仿真分析。重点分析影响天窗运动执行机构工作状态的关键参数,并从运动学原理角度对天窗运动执行机构的设计方法进行研究。在仿真分析的基础上对运动执行机构进行优化设计,基于虚拟样机的仿真分析和优化结果试制物理样机。运动测试表明,所设计的运动执行机构能够满足轿车天窗各种工况的要求,并能为构建轿车天窗自主开发平台奠定基础。 相似文献
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基于尺度自适应模拟的汽车天窗风振噪声特性分析 总被引:1,自引:0,他引:1
采用尺度自适应湍流模型对一个简易天窗进行数值模拟,通过与试验结果对比,验证数值计算方法的准确性。针对某轿车天窗风振噪声问题,进行不同来流速度条件下的数值模拟,模拟结果表明,轿车天窗风振噪声是声反馈和亥姆霍兹共振两种机制共同作用的结果。在发生亥姆霍兹共振时,通过对一个周期内天窗开口处涡运动对乘员耳旁处压力的影响分析,揭示天窗产生风振的压力特性。深入地研究剪切层失稳特性,对于最强的风振噪声,流向上和横向上速度的方均根值最大,表明亥姆霍兹共振加剧了剪切层里的扰动,产生的风振能量最高。在乘员舱发生亥姆霍兹共振的风速条件下,随着乘员人数的增加,风振噪声的峰值声压级有所降低,与之相关的频率变化很小。 相似文献
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Hyung-Seok Kook Seong-Ryong Shin Gang-Duck Ih 《International Journal of Precision Engineering and Manufacturing》2010,11(1):5-11
A wind deflector that is properly installed near the leading edge of the sunroof opening of a vehicle is known to effectively
suppress the sunroof buffeting noise. However, the efficiency of wind noise reduction is very sensitive to the position and
angle of the deflector. An automatic deflector-traversing device was devised to automate the sunroof deflector test procedure.
It can automatically place a deflector at any desired position and angle with high accuracy. The deflector-traversing device
was tested in a SUV vehicle at various wind speeds in an acoustically treated wind tunnel. In the test reported in the present
work, the investigation area within which the position of the deflector could be varied was approximately 12mm × 20mm. Hundreds
of deflector positions and angles were tested in the investigation area in a relatively short time period. A post-processing
program was then used to process the abundant data obtained from the automatic measurements. For a narrow region of investigation,
the post-processing program yielded color maps with high resolution for the high-frequency wind rush noise levels as well
as the low-frequency sunroof buffeting noise levels as functions of the positions and angles of the deflector. It is concluded
that the deflector-traversing device can be used together with an analytical model for the prediction of the buffeting noise
for optimizing the deflector position to effectively suppress both the buffeting noise and the wind rush noise. 相似文献