Question

翻译啊。。。谢谢谢谢。

Measurement tests for actual railway vehicles were conducted to evaluate the validity of the LPM-based modal property identification method. A stationary vibration test using an exciter (a suitable technique to ascertain modal properties clearly since the input/output relationship is definite and the results are easily comparable to those of other methods) was carried out first. In this test, a railway vehicle was situated on the rail and excited using an exciter to measure the response vibration of the carbody.
Figure 1 shows the railway vehicle tested here. This is a test vehicle belonging to the Railway Technical Research Institute (RTRI), and has almost identical carbody structures to those of current commuter-type vehicles used in commercial service. The carbody shell is made of stainless steel, which is the dominant material for commuter-type vehicles in Japan.The test vehicle has no service equipment such as passenger seats or lighting, and the airconditioner on the roof is a dummy unit with mass and inertia moments equivalent to those of an actual model. The length, width and height of the carbody are 19.5 m, 2.95 m and 2.67 m,respectively, and its mass (without bogies) is approximately 10.7 tons.
The acceleration measurement points on the carbody and the excitation point are shown in Fig. 2. In this vibration test, a total of 43 acceleration pickups were attached to the carbody (17 points on the floor in the vertical direction, 14 points on the roof in the vertical direction, 6 points on the side panel in the lateral direction, and 3 points on each end panel in the longitudinal direction), and an electrodynamic exciter (maximum excitation capacity 1 kN)was fixed in the center of the floor from underneath with a driving rod. A load cell was installed between the driving rod and the carbody to measure the excitation force. Thus, the numbers of input and output signals were P = 1 and Q = 43, respectively, in this case.A band-limited random signal with a uniform frequency component in the range of 5-30Hz was used to excite the vehicle, and the excitation test duration was 120 s. The measured
data were recorded in digital format with a sampling time of Δt = 0.005 s (200 Hz) , and the cut-off frequency of the anti-aliasing filter was set to 80 Hz.

Answer 1

实际的铁路车辆的测量测试基于LPM-Modal属性识别方法的有效性进行评估。静止的振动测试使用励磁（合适的技术来确定模态性质清楚，因为输入/输出关系是明确的，结果是很容易与其他方法）进行了第一。在该试验中，坐落在轨道上的铁道车辆和兴奋使用激励器来测量车体的振动响应。
图1示出这里测试的铁道车辆。这是一个测试车辆属于铁路技术研究所（RTRI）的，当前的通勤型商业服务中使用的车辆，并具有几乎相同的车体结构。车体外壳采用不锈钢，这是占主导地位的通勤型材料，在日本。测试车辆的车辆没有如乘客座椅或照明的服务设备，并在屋顶上的空调是一个虚拟的单位质量和惯性相当于一个实际模型的时刻。车体的长度，宽度和高度19.5米，2.95 m和2.67米的，分别和它的质量（无转向架）约10.7吨。
示于图上的车体的加速度测量点和激励点。 2。在此振动试验中，一共有43个加速度拾音器连接到车体（地板上，在垂直方向上的17个点，14点在垂直方向上的屋顶上，在横向方向上的侧板上的6点，和3被固定在地板上，从下方与驱动杆的中心的长度方向上的各端部面板的点），和一个电动激励器（最大激发容量1千牛顿）。 A称重传感器测量的激振力的驱动杆和车体之间安装。因此，输入和输出信号的数字分别为P = 1，Q = 43，分别在此case.A被用来激发车辆具有均匀的在5-30Hz的范围内的频率分量的带限随机信号，并激发试验持续时间为120秒。测量
数据以数字格式被记录，可与采样时间长Δt= 0.005秒（200赫兹），抗混叠滤波器的截止频率被设置为80赫兹。