NVH Experiments and Analyses for an Single Cylinder Engine Model Assembled with Tap-Bolts and with Through-Bolts Okamura NVH Laboratory

Format:

Conference/Event

Author/Creator:

Okamura, Hideo, author.

Conference Name:

SAE 2005 Noise and Vibration Conference and Exhibition (2005-05-16 : Grand Traverse, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

A series of NVH experiments were performed for a set of single cylinder engine models made of aluminum, with bore sizes of 100mm. Each engine model consists of a cylinder head, a cylinder block and a bedplate. Each has the same size of 150mm 150mm, with different heights of 100mm, 200mm and 80mm, respectively. By choosing 112 measuring points on the structure surfaces, we performed a series of impact tests for the following cases,From a series of acceleration measurements, it was found thatTo investigate the reasons of such differences, the engine structure model was idealized as a set of beam elements consisting of variable cross-sections, to calculate the fundamental natural frequency, by Rayleigh's method. By applying 38 beam elements, and 3 sets of bolt joints each consisting of bolt and clamped member, we could calculate the fundamental natural frequencies successfully. Finally, we found that the higher natural frequencies and excellent NVH characteristics are caused by the larger values of flexural rigidity for the case (b)

Notes:

Vendor supplied data

Publisher Number:

2005-01-2531

Access Restriction:

Restricted for use by site license