Based on discrete random vibration theory, recurrence formulas are developed to calculate the dynamic response of structures under white noise excitations.
基于随机振动的离散分析理论，推导出白噪声激励下结构动力响应的递推公式。
In this paper, the relationship between the structure vibration and the surface noise radiation is analyzed and deduced from the acoustic and vibrational theory.
本文从声学振动理论出发，分析并导出了结构的振动与表面辐射噪声的关系。
And derived the expressions of parameters in teeth vibration equation, which completed essentially the theory of noise prediction and CAD on gears of transmission systems.
导出了轮齿振动方程序中各参数的表达式。初步完成了传动系齿轮部分的噪声预估及CAD的理论研究工作。
Finally, Based the analysis of theory modal, a modal testing program has been designed according to the existing test equipments, which prepares for the next testing of the vibration and noise.
在理论模态分析的基础上，根据现有的试验设备设计了合理的试验方案，为下步的振动与噪声的试验做了必要的理论准备。
Contributes to a research on the vibration radiation noise of piezoelectric pump. Two theory models are introduced, which calculate the synthetic sound pressure according to the vibration quantity.
研究压电泵振动放射噪声，提出两种由振动量计算压电泵合成声压的理论模型。
The gear dynamics analysis is, according to the theory of vibrate dynamics, to study the basic rule of vibration, shock and noise which created by gear system while transferring power and motion.
齿轮动力学分析是利用振动力学理论，研究齿轮系统在传递动力和运动过程中振动、冲击、噪声的基本规律，对齿轮传动的降噪、降振非常重要。
The relationship between the vibration and the noise of rolling bearings is studied based on the grey system theory.
以灰色系统理论为基础，通过实验研究6201和6203轴承振动与噪声的灰色关联性。
According the theory analysis, the effective method is applied in actual site and noise reduction effect is obvious after vibration isolation.
依据理论分析结果，对实际现场采取了有效的隔振降噪方法，隔振后降噪效果明显。
A 4d dynamic model has been established for the vehicle suspension system. No-linear random vibration theory is used to discuss how to solve this equation by FPK based on filtered white noise input.
建立了四自由度车辆悬挂系统的动力学模型，并应用非线性随机振动理论，在对模型输入进行过滤白噪声简化的基础上，探讨了用FPK法解方程的可能途径。
The theory of coherence function and spectrum of vibration and noise signals is applied in gearbox noise analysis in the paper. The basis of fault diagnosis of gearbox is theoretically introduced.
应用振动、噪声信号频谱分析和相干函数分析技术，从理论上说明变速箱故障诊断的依据。
Based on the theory analysis, the reason was discovered of oil- blocking during the operation of a gear oil pump, which resulted in power loss, vibration and noise.
通过分析 ，找出了齿轮油泵在运转过程中造成困油容积而形成功率损失、振动和噪声的原因 ，为设计和维修齿轮油泵提供了消除困油现象的方法和结构措施。
Based on the theory analysis, the reason was discovered of oil- blocking during the operation of a gear oil pump, which resulted in power loss, vibration and noise.
通过分析 ，找出了齿轮油泵在运转过程中造成困油容积而形成功率损失、振动和噪声的原因 ，为设计和维修齿轮油泵提供了消除困油现象的方法和结构措施。
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